Can Communication System Check Can Bus Line For Short To Gnd

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR SHORT TO GND IN CAN BUS WIRE (DLC3 BRANCH WIRE)

CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 JUNCTION CONNECTOR)

CHECK FOR SHORT TO GND IN CAN BUS WIRE (ECM MAIN WIRE)

CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 JUNCTION CONNECTOR - SKID CONTROL ECU)

CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 JUNCTION CONNECTOR - ECM)

CHECK FOR SHORT TO GND IN CAN BUS WIRE (POWER STEERING ECU BRANCH WIRE)

CHECK FOR SHORT TO GND IN CAN BUS WIRE (STEERING ANGLE SENSOR BRANCH WIRE)

CHECK FOR SHORT TO GND IN CAN BUS WIRE (YAW RATE SENSOR BRANCH WIRE)

CHECK FOR SHORT TO GND IN CAN BUS WIRE (MAIN BODY ECU BRANCH WIRE)

CHECK FOR SHORT TO GND IN CAN BUS WIRE (AIR CONDITIONING AMPLIFIER BRANCH WIRE)

CHECK FOR SHORT TO GND IN CAN BUS WIRE (CENTER AIRBAG SENSOR ASSEMBLY BRANCH WIRE)

CHECK FOR SHORT TO GND IN CAN BUS WIRE (COMBINATION METER MAIN WIRE)

CHECK FOR SHORT TO GND IN CAN BUS WIRE (ACCESSORY GATEWAY BRANCH WIRE)

CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 JUNCTION CONNECTOR - POWER STEERING ECU)

CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 JUNCTION CONNECTOR - STEERING ANGLE SENSOR)

CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 JUNCTION CONNECTOR - YAW RATE SENSOR)

CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 JUNCTION CONNECTOR - MAIN BODY ECU)

CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER)

CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 JUNCTION CONNECTOR - CENTER AIRBAG SENSOR ASSEMBLY)

CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 JUNCTION CONNECTOR - COMBINATION METER)

CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 JUNCTION CONNECTOR - ACCESSORY GATEWAY)

CAN COMMUNICATION SYSTEM - Check CAN Bus Line for Short to GND

DESCRIPTION

There may be a short circuit between the CAN bus line and GND when there is no resistance between terminals 6 (CANH) and 4 (CG) or terminals 14 (CANL) and 4 (CG) of the DLC3.

Symptom	Trouble Area
No resistance exists between terminals 6 (CANH) and 4 (CG) or terminals 14 (CANL) and 4 (CG) of DLC3.	Short to GND in CAN bus wire Short to GND in CAN bus wire Skid control ECU Power steering ECU Steering angle sensor (w/ VSC) Yaw rate sensor (w/ VSC) ECM Center airbag sensor assembly Air conditioning amplifier Combination meter ECU Main body ECU Accessory Gateway

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

1. Turn the ignition switch off before measuring the resistance between main CAN bus wires and CAN Bus branch wires.
   
2. After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not operating.
   
3. Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors. If any doors need to be opened in order to check the connectors, open the doors and leave them open.
   

HINT:

1. Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN. This communication will cause the resistance value to change.
   
2. Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.
   

1.CHECK FOR SHORT TO GND IN CAN BUS WIRE (DLC3 BRANCH WIRE)

1. Turn the ignition switch off.
   

2. Disconnect the CAN No. 1 junction connector.
   

   Text in Illustration

   *A	for TMC Made
   *B	except TMC Made
   *a	Rear view of wire harness connector (to CAN No. 1 Junction Connector)

3. Measure the resistance according to the value(s) in the table below.
   

   Text in Illustration

   *1

   DLC3

   HINT:

   The resistance must be measured after the CAN No. 1 junction connector is disconnected.

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E11-6 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
   E11-14 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

NG	REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DLC3

OK

2.CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 JUNCTION CONNECTOR)

1. Reconnect the CAN No. 1 junction connector.
   

2. Disconnect the CAN No. 2 junction connector.
   

3. Measure the resistance according to the value(s) in the table below.
   

   Text in Illustration

   *1

   DLC3

   HINT:

   The resistance must be measured after the CAN No. 2 junction connector is disconnected.

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E11-6 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
   E11-14 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

NG	Go to step 6

OK

3.CHECK FOR SHORT TO GND IN CAN BUS WIRE (ECM MAIN WIRE)

1. Measure the resistance according to the value(s) in the table below.
   

   Text in Illustration

   *a	Front view of wire harness connector (to CAN No. 2 Junction Connector)
   *1	DLC3

   HINT:

   The resistance must be measured after the CAN No. 2 junction connector is disconnected.

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   A48-2 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
   A48-4 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

NG	Go to step 5

OK

4.CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 JUNCTION CONNECTOR - SKID CONTROL ECU)

1. Disconnect the skid control ECU connector.
   

   Text in Illustration

   *A	w/o VSC
   *B	w/ VSC
   *a	Front view of wire harness connector (to Skid Control ECU with Actuator)

2. Measure the resistance according to the value(s) in the table below.
   

   Text in Illustration

   *a	Front view of wire harness connector (to CAN No. 2 Junction Connector)
   *1	DLC3

   HINT:

   The resistance must be measured after the skid control ECU connector and CAN No. 2 junction connector are disconnected.

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   A48-1 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
   A48-3 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

   Result:

   Result	Proceed to
   OK (w/o VSC)	A
   OK ( w/ VSC)	B
   NG	C

B	REPLACE BRAKE ACTUATOR ASSEMBLY (COROLLA_ZRE142 RM000003CZU00MX.html)
C	REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 2 JUNCTION CONNECTOR - SKID CONTROL ECU)

A
REPLACE BRAKE ACTUATOR ASSEMBLY (COROLLA_ZRE142 RM0000013P6022X.html)

5.CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 JUNCTION CONNECTOR - ECM)

1. Disconnect the ECM connector.
   

   Text in Illustration

   *a	Front view of wire harness connector (to ECM)

2. Measure the resistance according to the value(s) in the table below.
   

   Text in Illustration

   *a	Front view of wire harness connector (to CAN No. 2 Junction Connector)
   *1	DLC3

   HINT:

   The resistance must be measured after the ECM connector and CAN No. 2 junction connector are disconnected.

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   A48-2 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
   A48-4 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

   Result:

   Result	Proceed to
   OK (for 2ZR-FE)	A
   OK (for 2AZ-FE)	B
   NG	C

B	REPLACE ECM (COROLLA_ZRE142 RM000002WT506MX.html)
C	REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (CAN NO. 2 JUNCTION CONNECTOR - ECM)

A
REPLACE ECM (COROLLA_ZRE142 RM000001CN0030X.html)

6.CHECK FOR SHORT TO GND IN CAN BUS WIRE (POWER STEERING ECU BRANCH WIRE)

1. Reconnect the CAN No. 2 junction connector.
   

2. Disconnect the CAN No. 1 junction connector.
   

3. TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      1. The resistance must be measured after the CAN No. 2 junction connector is reconnected.
         
      2. The resistance must be measured after the CAN No. 1 junction connector is disconnected.
         

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E58-3 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E58-14 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

4. Except TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      1. The resistance must be measured after the CAN No. 2 junction connector is reconnected.
         
      2. The resistance must be measured after the CAN No. 1 junction connector is disconnected.
         

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E71-3 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E71-14 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

NG	Go to step 14

OK

7.CHECK FOR SHORT TO GND IN CAN BUS WIRE (STEERING ANGLE SENSOR BRANCH WIRE)

1. TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the CAN No. 1 junction connector is disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E58-5 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E58-16 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

2. Except TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the CAN No. 1 junction connector is disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E71-8 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E71-19 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

NG	Go to step 15

OK

8.CHECK FOR SHORT TO GND IN CAN BUS WIRE (YAW RATE SENSOR BRANCH WIRE)

1. TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the CAN No. 1 junction connector is disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E58-6 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E58-17 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

2. Except TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the CAN No. 1 junction connector is disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E71-9 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E71-20 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

NG	Go to step 16

OK

9.CHECK FOR SHORT TO GND IN CAN BUS WIRE (MAIN BODY ECU BRANCH WIRE)

1. TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the CAN No. 1 junction connector is disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E58-8 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E58-19 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

2. Except TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the CAN No. 1 junction connector is disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E71-1 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E71-12 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

NG	Go to step 17

OK

10.CHECK FOR SHORT TO GND IN CAN BUS WIRE (AIR CONDITIONING AMPLIFIER BRANCH WIRE)

1. TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the CAN No. 1 junction connector is disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E58-4 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E58-15 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

2. Except TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the CAN No. 1 junction connector is disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E71-7 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E71-18 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

NG	Go to step 18

OK

11.CHECK FOR SHORT TO GND IN CAN BUS WIRE (CENTER AIRBAG SENSOR ASSEMBLY BRANCH WIRE)

1. TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the CAN No. 1 junction connector is disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E58-9 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E58-20 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

2. Except TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the CAN No. 1 junction connector is disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E71-5 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E71-16 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

NG	Go to step 19

OK

12.CHECK FOR SHORT TO GND IN CAN BUS WIRE (COMBINATION METER MAIN WIRE)

1. TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the CAN No. 1 junction connector is disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E58-2 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E58-13 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

2. Except TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the CAN No. 1 junction connector is disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E71-4 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E71-15 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

NG	Go to step 20

OK

13.CHECK FOR SHORT TO GND IN CAN BUS WIRE (ACCESSORY GATEWAY BRANCH WIRE)

1. TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the CAN No. 1 junction connector is disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E58-11 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E58-22 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

2. Except TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the CAN No. 1 junction connector is disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E71-11 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E71-22 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

Result:

Result	Proceed to
OK	A
NG (w/o remote engine start)	B
NG (w/ remote engine start)	C

B	REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 1 JUNCTION CONNECTOR - ACCESSORY GATEWAY)
C	Go to step 21

A
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (CAN NO. 1 JUNCTION CONNECTOR - CAN NO. 2 JUNCTION CONNECTOR)

14.CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 JUNCTION CONNECTOR - POWER STEERING ECU)

1. Disconnect the power steering ECU connector.
   

   Text in Illustration

   *a	Front view of wire harness connector (to Power Steering ECU)

2. TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the power steering ECU connector and CAN No. 1 junction connector are disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E58-3 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E58-14 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

3. Except TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the power steering ECU connector and CAN No. 1 junction connector are disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E71-3 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E71-14 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

Result:

Result	Proceed to
OK (for 2AZ-FE)	A
OK (for 2ZR-FE)	B
NG	C

B	REPLACE POWER STEERING ECU (COROLLA_ZRE142 RM000002XN605BX.html)
C	REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 1 JUNCTION CONNECTOR - POWER STEERING ECU)

A
REPLACE POWER STEERING ECU (COROLLA_ZRE142 RM000002XN605AX.html)

15.CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 JUNCTION CONNECTOR - STEERING ANGLE SENSOR)

1. Disconnect the steering angle sensor connector.
   

   Text in Illustration

   *a	Rear view of wire harness connector (to Steering Angle Sensor)

2. TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the steering angle sensor connector and CAN No. 1 junction connector are disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E58-5 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E58-16 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

3. Except TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the steering angle sensor connector and CAN No. 1 junction connector are disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E71-8 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E71-19 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

NG	REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 1 JUNCTION CONNECTOR - STEERING ANGLE SENSOR)

OK
REPLACE STEERING ANGLE SENSOR (COROLLA_ZRE142 RM000002VP1018X.html)

16.CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 JUNCTION CONNECTOR - YAW RATE SENSOR)

1. Disconnect the yaw rate sensor connector.
   

   Text in Illustration

   *a	Front view of wire harness connector (to Yaw Rate Sensor)

2. TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the yaw rate sensor connector and CAN No. 1 junction connector are disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E58-6 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E58-17 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

3. Except TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the yaw rate sensor connector and CAN No. 1 junction connector are disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E71-9 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E71-20 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

NG	REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 1 JUNCTION CONNECTOR - YAW RATE SENSOR)

OK
REPLACE YAW RATE SENSOR (COROLLA_ZRE142 RM000003D8S00IX.html)

17.CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 JUNCTION CONNECTOR - MAIN BODY ECU)

1. Disconnect the main body ECU connector.
   

   Text in Illustration

   *A	w/ Smart Key System
   *B	w/o Smart Key System
   *a	Front view of wire harness connector (to Main Body ECU)

2. TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the main body ECU connector and CAN No. 1 junction connector are disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E58-8 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E58-19 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

3. Except TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the main body ECU connector and CAN No. 1 junction connector are disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E71-1 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E71-12 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

NG	REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 1 JUNCTION CONNECTOR - MAIN BODY ECU)

OK
REPLACE MAIN BODY ECU

18.CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER)

1. Disconnect the air conditioning amplifier connector.
   

   Text in Illustration

   *A	Auto Air Conditioning
   *B	Manual Air Conditioning, for 2ZR-FE
   *C	Manual Air Conditioning, for 2AZ-FE
   *a	Front view of wire harness connector (to Air Conditioning Amplifier)

2. TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the air conditioning amplifier connector and CAN No. 1 junction connector are disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E58-4 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E58-15 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

3. Except TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the air conditioning amplifier connector and CAN No. 1 junction connector are disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E71-7 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E71-18 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

NG	REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 1 JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER)

OK
REPLACE AIR CONDITIONING AMPLIFIER (COROLLA_ZRE142 RM000002XMC01VX.html)

19.CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 JUNCTION CONNECTOR - CENTER AIRBAG SENSOR ASSEMBLY)

1. Disconnect the center airbag sensor assembly connector.
   

   Text in Illustration

   *a	Rear view of wire harness connector (to Center Airbag Sensor assembly)

2. TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the center airbag sensor assembly connector and CAN No. 1 junction connector are disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E58-9 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E58-20 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

3. Except TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the center airbag sensor assembly connector and CAN No. 1 junction connector are disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E71-5 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E71-16 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

NG	REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 1 JUNCTION CONNECTOR - CENTER AIRBAG SENSOR ASSEMBLY)

OK
REPLACE CENTER AIRBAG SENSOR ASSEMBLY (COROLLA_ZRE142 RM000000UWV074X.html)

20.CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 JUNCTION CONNECTOR - COMBINATION METER)

1. Disconnect the combination meter connector.
   

   Text in Illustration

   *a	Rear view of wire harness connector (to Combination Meter)

2. TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the combination meter connector and CAN No. 1 junction connector are disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E58-2 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E58-13 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

3. Except TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the combination meter connector and CAN No. 1 junction connector are disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E71-4 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E71-15 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

NG	REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (CAN NO. 1 JUNCTION CONNECTOR - COMBINATION METER)

OK
REPLACE COMBINATION METER (COROLLA_ZRE142 RM0000024D7032X.html)

21.CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 JUNCTION CONNECTOR - ACCESSORY GATEWAY)

1. Disconnect the accessory gateway connector from the accessory.
   

   Text in Illustration

   *a	Rear view of wire harness connector (to Accessory Gateway)

2. TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the accessory gateway connector and CAN No. 1 junction connector are disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E58-11 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E58-22 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

3. Except TMC made:
   

   
   
   

   1. Measure the resistance according to the value(s) in the table below.
      

      Text in Illustration

      *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
      *1	DLC3

      HINT:

      The resistance must be measured after the accessory gateway connector and CAN No. 1 junction connector are disconnected.

      Standard Resistance:

      Tester Connection	Switch Condition	Specified Condition
      E71-11 (CANH) - E11-4 (CG)	Ignition switch off	200 Ω or higher
      E71-22 (CANL) - E11-4 (CG)	Ignition switch off	200 Ω or higher

NG	REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 1 JUNCTION CONNECTOR - ACCESSORY GATEWAY)

OK
REPLACE THE ACCESSORY