Power Source Network. Land Cruiser. Urj200, 202 Grj200 Vdj200
Networking. Land Cruiser. Urj200, 202 Grj200 Vdj200
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (ECM - NO. 1 CAN JUNCTION CONNECTOR)
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (COMBINATION METER ASSEMBLY - NO. 2 CAN JUNCTION CONNECTOR)
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (CENTRAL GATEWAY ECU - NO. 1 CAN JUNCTION CONNECTOR)
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 1 CAN JUNCTION CONNECTOR)
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 CAN JUNCTION CONNECTOR)
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (ECU, SENSOR)
CAN COMMUNICATION SYSTEM (for LHD with Central Gateway ECU) - Check Bus 2 Line for Short to +B |
DESCRIPTION
There may be a short circuit between one of the CAN bus wires and +B when no resistance exists between terminal 18 (CA4H) of the central gateway ECU and terminal 16 (BAT) of the DLC3, or terminal 17 (CA4L) of the central gateway ECU and terminal 16 (BAT) of the DLC3.| Detection Item | Trouble Area |
| No resistance exists between terminal 18 (CA4H) of the central gateway ECU and terminal 16 (BAT) of the DLC3, or terminal 17 (CA4L) of the central gateway ECU and terminal 16 (BAT) of the DLC3. |
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- *1: w/ Variable Flow Control Solenoid Valve
- *2: w/ Tire Pressure Warning System
- *3: w/ Entry and Start System
- *4: w/ Variable Gear Ratio Steering System
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output (Click here).
- Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key, switches or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
- After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work (Click here).
- After the repair, perform CAN Bus Check and check that all the ECUs and sensors connected to the CAN communication system are displayed (Click here).
- HINT:
- Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.
- 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 B+ IN CAN BUS WIRE (ECM - NO. 1 CAN JUNCTION CONNECTOR) |
Disconnect the cable from the negative (-) battery terminal.
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Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
for 1UR-FE, 1GR-FE: Tester Connection Condition Specified Condition A38-10 (CANH) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher A38-11 (CANL) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher for 1VD-FTV: Tester Connection Condition Specified Condition A38-41 (CANH) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher A38-49 (CANL) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher for 3UR-FE: Tester Connection Condition Specified Condition A38-11 (CANH) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher A38-19 (CANL) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
Text in Illustration *A for 1UR-FE, 1GR-FE *B for 1VD-FTV *C for 3UR-FE *a Front view of wire harness connector
(to ECM)*b Front view of DLC3 Result Result Proceed to OK (for 1UR-FE) A OK (for 1VD-FTV) B OK (for 1GR-FE) C OK (for 3UR-FE) D NG E
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| A | ||
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| 2.CONNECT CONNECTOR |
Reconnect the A38 ECM connector.
| NEXT | |
| 3.CHECK FOR SHORT TO B+ IN CAN BUS WIRE (COMBINATION METER ASSEMBLY - NO. 2 CAN JUNCTION CONNECTOR) |
Disconnect the combination meter assembly connector.
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Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition E119-39 (CANH) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher E119-40 (CANL) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
Text in Illustration *a Rear view of wire harness connector
(to Combination Meter Assembly)*b Front view of DLC3
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| OK | ||
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| 4.CONNECT CONNECTOR |
Reconnect the E119 combination meter assembly connector.
| NEXT | |
| 5.CHECK FOR SHORT TO B+ IN CAN BUS WIRE (CENTRAL GATEWAY ECU - NO. 1 CAN JUNCTION CONNECTOR) |
Disconnect the central gateway ECU connector.
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Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition E145-18 (CA4H) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher E145-17 (CA4L) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
Text in Illustration *a Front view of wire harness connector
(to Central Gateway ECU)*b Front view of DLC3
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| OK | ||
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| 6.CONNECT CONNECTOR |
Reconnect the E145 central gateway ECU connector.
| NEXT | |
| 7.CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 1 CAN JUNCTION CONNECTOR) |
Disconnect the No. 1 CAN junction connector.
Text in Illustration *a Front view of wire harness connector
(to No. 1 CAN Junction Connector)*b Front view of DLC3 *c to No. 2 CAN Junction Connector *d to 4WD Control ECU *e to Power Steering ECU Assembly (w/ Variable Flow Control Solenoid Valve) *f to Airbag Sensor Assembly *g to Tire Pressure Warning ECU (w/ Tire Pressure Warning System) *h to ECM *i to Air Conditioning Amplifier Assembly *j to Central Gateway ECU
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition Connect to E135-1 (CANH) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher No. 2 CAN junction connector E135-11 (CANL) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher E135-2 (CANH) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher 4WD control ECU E135-12 (CANL) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher E135-3 (CANH) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Power steering ECU assembly*1 E135-13 (CANL) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher E135-4 (CANH) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Airbag sensor assembly E135-14 (CANL) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher E135-5 (CANH) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Tire pressure warning ECU*2 E135-15 (CANL) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher E135-7 (CANH) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher ECM E135-17 (CANL) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher E135-8 (CANH) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Air conditioning amplifier assembly E135-18 (CANL) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher E135-9 (CANH) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Central gateway ECU E135-19 (CANL) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
- *1: w/ Variable Flow Control Solenoid Valve
- *2: w/ Tire Pressure Warning System
Result Result Proceed to OK A NG (ECM CAN main wire) B NG (Central gateway ECU CAN branch wire) C NG (No. 2 CAN junction connector CAN main wire) D NG (ECU or sensor CAN branch wires) E
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| A | ||
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| 8.CONNECT CONNECTOR |
Reconnect the E135 No. 1 CAN junction connector.
| NEXT | |
| 9.CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 CAN JUNCTION CONNECTOR) |
Disconnect the No. 2 CAN junction connector.
Text in Illustration *a Front view of wire harness connector
(to No. 2 CAN Junction Connector)*b Front view of DLC3 *c to No. 1 CAN Junction Connector *d to Main Body ECU (Multiplex Network Body ECU) *e to Master Cylinder Solenoid (Skid Control ECU) *f to Headlight Leveling ECU Assembly *g to Certification ECU (Smart Key ECU Assembly) (w/ Entry and Start System) *h to Combination Meter Assembly *i to Steering Control ECU (w/ Variable Gear Ratio Steering System) *j to Spiral with Sensor Cable Sub-assembly (Steering Angle Sensor)
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition Connect to E133-1 (CANH) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher No. 1 CAN junction connector E133-11 (CANL) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher E133-2 (CANH) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Main body ECU (multiplex network body ECU) E133-12 (CANL) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher E133-3 (CANH) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Master cylinder solenoid (skid control ECU) E133-13 (CANL) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher E133-4 (CANH) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Headlight leveling ECU assembly E133-14 (CANL) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher E133-6 (CANH) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Certification ECU (smart key ECU assembly)*1 E133-16 (CANL) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher E133-7 (CANH) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Combination meter assembly E133-17 (CANL) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher E133-8 (CANH) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Steering control ECU*2 E133-18 (CANL) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher E133-10 (CANH) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Spiral with sensor cable sub-assembly (steering angle sensor) E133-20 (CANL) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
- *1: w/ Entry and Start System
- *2: w/ Variable Gear Ratio Steering System
Result Result Proceed to OK A NG (Combination meter assembly CAN main wire) B NG (No. 1 CAN junction connector CAN main wire) C NG (ECU or sensor CAN branch wires) D
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| A | ||
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| 10.CHECK FOR SHORT TO B+ IN CAN BUS WIRE (ECU, SENSOR) |
Reconnect the CAN junction connector.
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Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the bus line shorted to +B is connected
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition E145-18 (CA4H) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher E145-17 (CA4L) - E22-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
Text in Illustration *a Component with harness connected
(Central Gateway ECU)*b Front view of DLC3 - HINT:
- If the resistance changes to 6 kΩ or higher when the connector is disconnected from the ECU or sensor, there may be a short in the ECU or sensor.
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| OK | ||
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