DESCRIPTION
There may be a short circuit between the CAN bus main wire and GND when there is no resistance between terminals 6 (CANH) and 4 (CG) or 14 (CANL) and 4 (CG) of the DLC3.
| Symptom | Trouble Area |
|---|---|
| No resistance exists between terminals 6 (CANH) and 4 (CG) or 14 (CANL) and 4 (CG) of DLC3. |
|
*1: for AWD
*2: w/ Smart entry and start system
*3: w/o Smart entry and start system
*4: for Navigation receiver type
*5: for Radio and display type
WIRING DIAGRAM
INSPECTION PROCEDURE
Note
Turn the ignition switch off before measuring the resistances between CAN bus main wires and between CAN bus branch wires.
Turn the ignition switch off before inspecting CAN bus wires for a ground short.
After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not operating.
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 connectors, open the doors and leave them open.
Tech Tips
Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
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.
PROCEDURE
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 J/C)
Turn the ignition switch off.
| *1 | Front view of wire harness connector (to CAN No. 1 Junction Connector) |
| *2 | to CAN No. 2 Junction Connector |
Disconnect the CAN No. 1 junction connector (D56).
| *3 | DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 J/C - CAN NO. 1 J/C) Click here |
| OK |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 J/C)
Disconnect the CAN No. 1 junction connector (A44) .
| *1 | Front view of wire harness connector (to CAN No. 1 Junction Connector) |
| *2 | DLC3 |
| *3 | to Skid Control ECU (Brake Actuator Assembly) |
| *4 | to ECM |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
| Result | ||||||||
|---|---|---|---|---|---|---|---|---|
|
| B |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 J/C - SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)) Click here |
| C |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 J/C - ECM) Click here |
| A |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 J/C)
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
*1: w/o Smart entry and start system
*2: w/ Smart entry and start system
*3: for AWD
| *1 | Front view of wire harness connector (to CAN No. 1 Junction Connector) |
| *2 | DLC3 |
| *3 | to Air Conditioning Amplifier Assembly |
| *4 | to Power Management Control ECU |
| *5 | to AWD Control ECU |
| Result | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
| B |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 J/C - AIR CONDITIONING AMPLIFIER ASSEMBLY) Click here |
| C |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 J/C - POWER MANAGEMENT CONTROL ECU) Click here |
| D |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 J/C - AWD CONTROL ECU) Click here |
| A |
|
REPLACE CAN NO. 1 J/C
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 J/C - CAN NO. 1 J/C)
| *1 | Front view of wire harness connector (to CAN No. 2 Junction Connector) |
| *2 | DLC3 |
| *3 | to CAN No. 1 Junction Connector |
Disconnect the CAN No. 2 junction connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (CAN NO. 2 J/C - CAN NO. 1 J/C) |
| OK |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 J/C)
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
| *1 | Front view of wire harness connector (to CAN No. 2 Junction Connector) |
| *2 | DLC3 |
| *3 | to Center Airbag Sensor Assembly |
| *4 | to Yaw Rate and Acceleration Sensor |
| *5 | to Main Body ECU (Driver Side Junction Block Assembly) |
| *6 | to Steering Angle Sensor (Spiral Cable with Sensor Sub-assembly) |
| Result | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
| B |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 J/C - CENTER AIRBAG SENSOR ASSEMBLY) Click here |
| C |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 J/C - YAW RATE AND ACCELERATION SENSOR) Click here |
| D |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 J/C - MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)) Click here |
| E |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 J/C - STEERING ANGLE SENSOR (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY)) Click here |
| A |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 J/C)
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
*1: w/ Smart entry and start system
| *1 | Front view of wire harness connector (to CAN No. 2 Junction Connector) |
| *2 | DLC3 |
| *3 | to DLC3 |
| *4 | to Power Steering ECU Assembly |
| *5 | to Combination Meter Assembly |
| *6 | to Certification ECU (Smart Key ECU Assembly) |
| Result | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
| B |
|
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DLC3 |
| C |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 J/C - POWER STEERING ECU ASSEMBLY) Click here |
| D |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 J/C - COMBINATION METER ASSEMBLY) Click here |
| E |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 J/C - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)) Click here |
| A |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 J/C)
| *1 | Front view of wire harness connector (to CAN No. 2 Junction Connector) |
| *2 | DLC3 |
| *3 |
|
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
| Result | ||||||||
|---|---|---|---|---|---|---|---|---|
|
| B |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 J/C - NAVIGATION RECEIVER ASSEMBLY) Click here |
| C |
|
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 J/C - RADIO AND DISPLAY RECEIVER ASSEMBLY) Click here |
| A |
|
REPLACE CAN NO. 2 J/C
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 J/C - SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY))
| *1 | Front view of wire harness connector: (to Skid Control ECU (Brake Actuator Assembly)) |
Disconnect the skid control ECU (brake actuator assembly) connector.
| *2 | Front view of wire harness connector (to CAN No. 1 Junction Connector) |
| *3 | DLC3 |
| *4 | to Skid Control ECU (Brake Actuator Assembly) |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 1 J/C - SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)) |
| OK |
|
REPLACE BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) Click here
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 J/C - ECM)
| *1 | Front view of wire harness connector (to ECM) |
Disconnect the ECM connector.
| *4 | Front view of wire harness connector (to CAN No. 1 Junction Connector) |
| *5 | DLC3 |
| *6 | to ECM |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (CAN NO. 1 J/C - ECM) |
| OK |
|
REPLACE ECM Click here
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 J/C - AIR CONDITIONING AMPLIFIER ASSEMBLY)
| *1 | Front view of wire harness connector (to Air Conditioning Amplifier Assembly) |
Disconnect the air conditioning amplifier assembly connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| *2 | Front view of wire harness connector (to CAN No. 1 Junction Connector) |
| *3 | DLC3 |
| *4 | to Air Conditioning Amplifier Assembly |
| NG |
|
REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 1 J/C - AIR CONDITIONING AMPLIFIER ASSEMBLY) |
| OK |
|
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 J/C - POWER MANAGEMENT CONTROL ECU)
| *1 | Rear view of wire harness connector (to Power Management Control ECU) |
Disconnect the power management control ECU connector.
| *2 | Front view of wire harness connector (to CAN No. 1 Junction Connector) |
| *3 | DLC3 |
| *4 | to Power Management Control ECU |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 1 J/C - POWER MANAGEMENT CONTROL ECU) |
| OK |
|
REPLACE POWER MANAGEMENT CONTROL ECU Click here
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 1 J/C - AWD CONTROL ECU)
| *1 | Front view of wire harness connector (to AWD Control ECU) |
Disconnect the AWD control ECU connector.
| *2 | Front view of wire harness connector (to CAN No. 1 Junction Connector) |
| *3 | DLC3 |
| *4 | to AWD Control ECU |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 1 J/C - AWD CONTROL ECU) |
| OK |
|
REPLACE AWD CONTROL ECU Click here
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 J/C - CENTER AIRBAG SENSOR ASSEMBLY)
| *1 | Front view of wire harness connector (to Center Airbag Sensor Assembly) |
Disconnect the center airbag sensor assembly connector.
| *2 | Front view of wire harness connector (to CAN No. 2 Junction Connector) |
| *3 | DLC3 |
| *4 | to Center Airbag Sensor Assembly |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 2 J/C - CENTER AIRBAG SENSOR ASSEMBLY) |
| OK |
|
REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 J/C - YAW RATE AND ACCELERATION SENSOR)
| *1 | Front view of wire harness connector (to Yaw Rate and Acceleration Sensor) |
Disconnect the yaw rate and acceleration sensor connector.
| *2 | Front view of wire harness connector (to CAN No. 2 Junction Connector) |
| *3 | DLC3 |
| *4 | to Yaw Rate and Acceleration Sensor |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 2 J/C - YAW RATE AND ACCELERATION SENSOR) |
| OK |
|
REPLACE YAW RATE AND ACCELERATION SENSOR Click here
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 J/C - MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY))
| *1 | Front view of wire harness connector (to Main Body ECU (Driver Side Junction Block Assembly)) |
Disconnect the main body ECU (driver side junction block assembly) connector.
| *2 | Front view of wire harness connector (to CAN No. 2 Junction Connector) |
| *3 | DLC3 |
| *4 | to Main Body ECU (Driver Side Junction Block Assembly) |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 2 J/C - MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)) |
| OK |
|
REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) Click here
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 J/C - STEERING ANGLE SENSOR (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY))
| *1 | Front view of wire harness connector (to Steering Angle Sensor (Spiral Cable with Sensor Sub-assembly)) |
Disconnect the steering angle sensor (spiral cable with sensor sub-assembly) connector.
| *2 | Front view of wire harness connector (to CAN No. 2 Junction Connector) |
| *3 | DLC3 |
| *4 | to Steering Angle Sensor (Spiral Cable with Sensor Sub-assembly) |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 2 J/C - STEERING ANGLE SENSOR (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY)) |
| OK |
|
REPLACE STEERING ANGLE SENSOR (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY) Click here
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 J/C - POWER STEERING ECU ASSEMBLY)
| *1 | Front view of wire harness connector (to Power Steering ECU Assembly) |
Disconnect the power steering ECU assembly connector.
| *2 | Front view of wire harness connector (to CAN No. 2 Junction Connector) |
| *3 | DLC3 |
| *4 | to Power Steering ECU Assembly |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 2 J/C - POWER STEERING ECU ASSEMBLY) |
| OK |
|
REPLACE POWER STEERING ECU ASSEMBLY Click here
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 J/C - COMBINATION METER ASSEMBLY)
| *1 | Front view of wire harness connector (to Combination Meter Assembly) |
Disconnect the combination meter assembly connector.
| *2 | Front view of wire harness connector (to CAN No. 2 Junction Connector) |
| *3 | DLC3 |
| *4 | to Combination Meter Assembly |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (CAN NO. 2 J/C - COMBINATION METER ASSEMBLY) |
| OK |
|
REPLACE COMBINATION METER ASSEMBLY Click here
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 J/C - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))
| *1 | Front view of wire harness connector (to Certification ECU (Smart Key ECU Assembly)) |
Disconnect the certification ECU (smart key ECU assembly) connector.
| *2 | Front view of wire harness connector (to CAN No. 2 Junction Connector) |
| *3 | DLC3 |
| *4 | to Certification ECU (Smart Key ECU Assembly) |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 2 J/C - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)) |
| OK |
|
REPLACE SMART KEY ECU ASSEMBLY (CERTIFICATION ECU)
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 J/C - NAVIGATION RECEIVER ASSEMBLY)
| *1 | Front view of wire harness connector (to Navigation Receiver Assembly) |
Disconnect the navigation receiver assembly connector.
| *2 | Front view of wire harness connector (to CAN No. 2 Junction Connector) |
| *3 | DLC3 |
| *4 | to Navigation Receiver Assembly |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 2 J/C - NAVIGATION RECEIVER ASSEMBLY) |
| OK |
|
REPLACE NAVIGATION RECEIVER ASSEMBLY Click here
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN NO. 2 J/C - RADIO AND DISPLAY RECEIVER ASSEMBLY)
| *1 | Front view of wire harness connector (to Radio and Display Receiver Assembly) |
Disconnect the radio and display receiver assembly connector.
| *2 | Front view of wire harness connector (to CAN No. 2 Junction Connector) |
| *3 | DLC3 |
| *4 | to Radio and Display Receiver Assembly |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 2 J/C - RADIO AND DISPLAY RECEIVER ASSEMBLY) |
| OK |
|
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here