DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
PRECAUTION
DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (DLC3 CAN BRANCH WIRE)
CONNECT CONNECTOR
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR SIDE)
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - CENTER AIRBAG SENSOR ASSEMBLY)
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - MAIN BODY ECU)
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - ECM)
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (CENTER AIRBAG SENSOR ASSEMBLY)
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (MAIN BODY ECU)
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (ECM)
CONNECT CONNECTOR
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR)
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR SIDE)
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - MULTI-MEDIA MODULE RECEIVER ASSEMBLY)
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - HEADLIGHT SWIVEL ECU ASSEMBLY)
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - NETWORK GATEWAY ECU)
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (MULTI-MEDIA MODULE RECEIVER ASSEMBLY)
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (AIR CONDITIONING AMPLIFIER ASSEMBLY)
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (HEADLIGHT SWIVEL ECU ASSEMBLY)
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NETWORK GATEWAY ECU)
CONNECT CONNECTOR
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR)
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (COMBINATION METER ASSEMBLY)
CAN COMMUNICATION SYSTEM (for RHD) - Short to B+ in CAN Bus Line
DESCRIPTION
There may be a short circuit between the CAN bus lines and +B when the resistance between terminals 6 (CANH) and 16 (BAT) or terminals 14 (CANL) and 16 (BAT) of the DLC3 is below 6 kΩ.
| Symptom | Trouble Area |
| The resistance between terminals 6 (CANH) and 16 (BAT) or terminals 14 (CANL) and 16 (BAT) of the DLC3 is below 6 kΩ. | Short between CAN bus lines and +B
ECM
Center airbag sensor assembly*1
Headlight swivel ECU assembly*2
Multi-media module receiver assembly*3
Air conditioning amplifier assembly
Network gateway ECU
Main body ECU (cowl side junction block LH)
Combination meter assembly
No. 1 junction connector
No. 2 junction connector
No. 3 junction connector
|
*1: w/ Airbag System
*2: w/ Dynamic Headlight Auto Leveling
*3: w/ Navigation System
WIRING DIAGRAM
INSPECTION PROCEDURE
- Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.
- 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 ().
| 2.DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL |
Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the CAN main wire and the CAN branch wire.
- For vehicles with an SRS system:
- Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
- When disconnecting the cable, some systems need to be initialized after the cable is reconnected ().
| 3.CHECK FOR SHORT TO B+ IN CAN BUS WIRE (DLC3 CAN BRANCH WIRE) |
Disconnect the E75 No. 3 junction connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| E22-6 (CANH) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
| E22-14 (CANL) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
Text in Illustration| *a | Front view of DLC3 |
| | REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DLC3 (CANH, CANL) |
|
|
Reconnect the E75 No. 3 junction connector.
| 5.CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR SIDE) |
Disconnect the E72 No. 1 junction connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| E22-6 (CANH) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
| E22-14 (CANL) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
Text in Illustration| *a | Front view of DLC3 |
| 6.CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - CENTER AIRBAG SENSOR ASSEMBLY) |
- For vehicles without an airbag system, go to "Check for Short to B+ in CAN Bus Wire (No. 1 Junction Connector - Main Body ECU)".
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| E72-4 (CANH) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
| E72-15 (CANL) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
Text in Illustration| *a | Rear view of wire harness connector
(to No. 1 Junction Connector) |
| *b | Front view of DLC3 |
| 7.CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - MAIN BODY ECU) |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| E72-3 (CANH) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
| E72-14 (CANL) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
Text in Illustration| *a | Rear view of wire harness connector
(to No. 1 Junction Connector) |
| *b | Front view of DLC3 |
| 8.CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - ECM) |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| E72-2 (CANH) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
| E72-13 (CANL) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
Text in Illustration| *a | Rear view of wire harness connector
(to No. 1 Junction Connector) |
| *b | Front view of DLC3 |
| OK | |
| |
| REPLACE NO. 1 JUNCTION CONNECTOR |
|
| 9.CHECK FOR SHORT TO B+ IN CAN BUS WIRE (CENTER AIRBAG SENSOR ASSEMBLY) |
Disconnect the E47 center airbag sensor assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| E72-4 (CANH) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
| E72-15 (CANL) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
Text in Illustration| *a | Rear view of wire harness connector
(to No. 1 Junction Connector) |
| *b | Front view of DLC3 |
| | REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO CENTER AIRBAG SENSOR ASSEMBLY (CANH, CANL) |
|
|
| OK | |
| |
| REPLACE CENTER AIRBAG SENSOR ASSEMBLY ()
|
|
| 10.CHECK FOR SHORT TO B+ IN CAN BUS WIRE (MAIN BODY ECU) |
Disconnect the E3 main body ECU (cowl side junction block LH) connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| E72-3 (CANH) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
| E72-14 (CANL) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
Text in Illustration| *a | Rear view of wire harness connector
(to No. 1 Junction Connector) |
| *b | Front view of DLC3 |
| | REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO MAIN BODY ECU (CANH, CANL) |
|
|
| OK | |
| |
| REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH) |
|
| 11.CHECK FOR SHORT TO B+ IN CAN BUS WIRE (ECM) |
Disconnect the A52 ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| E72-2 (CANH) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
| E72-13 (CANL) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
Text in Illustration| *a | Rear view of wire harness connector
(to No. 1 Junction Connector) |
| *b | Front view of DLC3 |
Result| Result | Proceed to |
| OK (for 1GR-FE) | A |
| OK (for 1UR-FE) | B |
| OK (for 1VD-FTV) | C |
| NG | D |
| |
|
| |
|
| | REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO ECM (CANH, CANL) |
|
|
Reconnect the E72 No. 1 junction connector.
| 13.CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR) |
Disconnect the E69 No. 2 junction connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| E69-4 (CANH) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
| E69-15 (CANL) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
Text in Illustration| *a | Rear view of wire harness connector
(to No. 2 Junction Connector) |
| *b | Front view of DLC3 |
| | REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 2 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR) |
|
|
| 14.CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR SIDE) |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| E22-6 (CANH) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
| E22-14 (CANL) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
Text in Illustration| *a | Front view of DLC3 |
| 15.CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - MULTI-MEDIA MODULE RECEIVER ASSEMBLY) |
- For vehicles without an navigation system, go to "Check for Short to B+ in CAN Bus Wire (No. 2 Junction Connector - Air Conditioning Amplifier)".
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| E69-2 (CANH) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
| E69-13 (CANL) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
Text in Illustration| *a | Rear view of wire harness connector
(to No. 2 Junction Connector) |
| *b | Front view of DLC3 |
| 16.CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER ASSEMBLY) |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| E69-5 (CANH) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
| E69-16 (CANL) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
Text in Illustration| *a | Rear view of wire harness connector
(to No. 2 Junction Connector) |
| *b | Front view of DLC3 |
| 17.CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - HEADLIGHT SWIVEL ECU ASSEMBLY) |
- For vehicles without an dynamic headlight auto leveling, go to "Check for Short to B+ in CAN Bus Wire (No. 2 Junction Connector - Network Gateway ECU)".
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| E69-7 (CANH) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
| E69-18 (CANL) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
Text in Illustration| *a | Rear view of wire harness connector
(to No. 2 Junction Connector) |
| *b | Front view of DLC3 |
| 18.CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - NETWORK GATEWAY ECU) |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| E69-3 (CANH) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
| E69-14 (CANL) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
Text in Illustration| *a | Rear view of wire harness connector
(to No. 2 Junction Connector) |
| *b | Front view of DLC3 |
| OK | |
| |
| REPLACE NO. 2 JUNCTION CONNECTOR |
|
| 19.CHECK FOR SHORT TO B+ IN CAN BUS WIRE (MULTI-MEDIA MODULE RECEIVER ASSEMBLY) |
Disconnect the F77 multi-media module receiver assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| E69-2 (CANH) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
| E69-13 (CANL) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
Text in Illustration| *a | Rear view of wire harness connector
(to No. 2 Junction Connector) |
| *b | Front view of DLC3 |
| | REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO MULTI-MEDIA MODULE RECEIVER ASSEMBLY (CANH, CANL) |
|
|
| OK | |
| |
| REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY ()
|
|
| 20.CHECK FOR SHORT TO B+ IN CAN BUS WIRE (AIR CONDITIONING AMPLIFIER ASSEMBLY) |
Disconnect the E35*1 or E81*2 air conditioning amplifier connector.
*1: w/ Rear Air Conditioning System
*2: w/o Rear Air Conditioning System
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| E69-5 (CANH) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
| E69-16 (CANL) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
Text in Illustration| *a | Rear view of wire harness connector
(to No. 2 Junction Connector) |
| *b | Front view of DLC3 |
| | REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO AIR CONDITIONING AMPLIFIER ASSEMBLY (CANH, CANL) |
|
|
| OK | |
| |
| REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY ()
|
|
| 21.CHECK FOR SHORT TO B+ IN CAN BUS WIRE (HEADLIGHT SWIVEL ECU ASSEMBLY) |
Disconnect the E101 headlight swivel ECU assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| E69-7 (CANH) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
| E69-18 (CANL) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
Text in Illustration| *a | Rear view of wire harness connector
(to No. 2 Junction Connector) |
| *b | Front view of DLC3 |
| | REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO HEADLIGHT SWIVEL ECU ASSEMBLY (MPX1, MPX2) |
|
|
| OK | |
| |
| REPLACE HEADLIGHT SWIVEL ECU ASSEMBLY ()
|
|
| 22.CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NETWORK GATEWAY ECU) |
Disconnect the E31 network gateway ECU connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| E69-3 (CANH) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
| E69-14 (CANL) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
Text in Illustration| *a | Rear view of wire harness connector
(to No. 2 Junction Connector) |
| *b | Front view of DLC3 |
| | REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO NETWORK GATEWAY ECU (CANH, CANL) |
|
|
| OK | |
| |
| REPLACE NETWORK GATEWAY ECU ()
|
|
Reconnect the E69 No. 2 junction connector.
| 24.CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR) |
Disconnect the E75 No. 3 junction connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| E75-1 (CANH) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
| E75-12 (CANL) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
Text in Illustration| *a | Rear view of wire harness connector
(to No. 3 Junction Connector) |
| *b | Front view of DLC3 |
| | REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 3 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR) |
|
|
| 25.CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY) |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| E75-3 (CANH) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
| E75-14 (CANL) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
Text in Illustration| *a | Rear view of wire harness connector
(to No. 3 Junction Connector) |
| *b | Front view of DLC3 |
| OK | |
| |
| REPLACE NO. 3 JUNCTION CONNECTOR |
|
| 26.CHECK FOR SHORT TO B+ IN CAN BUS WIRE (COMBINATION METER ASSEMBLY) |
Disconnect the E7 combination meter assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| E75-3 (CANH) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
| E75-14 (CANL) - E22-16 (BAT) | Ignition switch off | 6 kΩ or higher |
Text in Illustration| *a | Rear view of wire harness connector
(to No. 3 Junction Connector) |
| *b | Front view of DLC3 |
Result| Result | Proceed to |
| OK (w/ Multi-information Display) | A |
| OK (w/o Multi-information Display) | B |
| NG | C |
| | REPLACE COMBINATION METER ASSEMBLY ()
|
|
|
| | REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO COMBINATION METER ASSEMBLY (CANH, CANL) |
|
|
| A | |
| |
| REPLACE COMBINATION METER ASSEMBLY ()
|
|
