DESCRIPTION
There may be a short circuit between the CAN bus main wires and/or CAN branch wires when the resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is below 54 Ω.
Symptom | Trouble Area |
---|---|
Resistance between terminals 6 (CANH) and 14 (CANL) of DLC3 is below 54 Ω. |
|
*1: w/ Navigation system
*2: w/ Audio and visual system (w/ Multi-display)
WIRING DIAGRAM
INSPECTION PROCEDURE
Note
Turn the engine switch off before measuring the resistances between CAN bus main wires and between CAN bus branch wires.
Turn the engine switch off before inspecting CAN bus wires for a ground short.
After the engine 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 1minute and do not operate the engine 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 engine 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 IN CAN BUS WIRE (CAN NO. 1 J/C - CAN NO. 2 J/C)
Turn the engine 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.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 2 J/C - CAN NO. 1 J/C) Click here |
OK |
CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 1 J/C - ECM)
*1 | Front view of wire harness connector (to CAN No. 1 Junction Connector) |
*2 | to ECM |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
CHECK FOR SHORT IN CAN BUS WIRE (ECM) Click here |
OK |
CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 1 J/C - DLC3)
*1 | Front view of wire harness connector (to CAN No. 1 Junction Connector) |
*2 | to DLC3 |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DLC3 |
OK |
CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 1 J/C - COMBINATION METER)
*1 | Front view of wire harness connector (to Combination Meter) |
Disconnect the combination meter connector.
*2 | Front view of wire harness connector (to CAN No. 1 Junction Connector) |
*3 | to Combination Meter |
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 - COMBINATION METER) |
OK |
CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 1 J/C - STEERING ANGLE SENSOR)
*1 | Front view of wire harness connector (to Steering Angle Sensor) |
Disconnect the steering angle sensor connector.
*2 | Front view of wire harness connector (to CAN No. 1 Junction Connector) |
*3 | to Steering Angle 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. 1 J/C - STEERING ANGLE SENSOR) |
OK |
CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 1 J/C - POWER STEERING ECU)
*1 | Front view of wire harness connector (to Power Steering ECU) |
Disconnect the power steering ECU connector.
*2 | Front view of wire harness connector (to CAN No. 1 Junction Connector) |
*3 | to Power Steering 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 STEERING ECU) |
OK |
CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 1 J/C - YAW RATE SENSOR)
*1 | Front view of wire harness connector (to Yaw Rate Sensor) |
Disconnect the yaw rate sensor connector.
*2 | Front view of wire harness connector (to CAN No. 1 Junction Connector) |
*3 | to Yaw Rate 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. 1 J/C - YAW RATE SENSOR) |
OK |
CHECK FOR SHORT 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 | 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 |
CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 1 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. 1 Junction Connector) |
*3 | 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. 1 J/C - CENTER AIRBAG SENSOR ASSEMBLY) |
OK |
CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 1 J/C - MAIN BODY ECU)
*1 | Front view of wire harness connector (to Main Body ECU) |
Disconnect the main body ECU connector.
*2 | Front view of wire harness connector (to CAN No. 1 Junction Connector) |
*3 | to Main Body 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 - MAIN BODY ECU) |
OK |
CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 1 J/C)
Reconnect the CAN No. 1 junction connector.
*1 | DLC3 |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
Note
The resistance must be measured after the main wire connected ECUs (ECM and certification ECU), and the CAN No. 1 and No. 2 junction connectors are reconnected.
NG |
REPLACE CAN NO. 1 JUNCTION CONNECTOR |
OK |
CHECK FOR SHORT IN CAN BUS WIRES (COMBINATION METER)
Reconnect the combination meter connector.
*1 | DLC3 |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
REPLACE COMBINATION METER ASSEMBLY |
OK |
CHECK FOR SHORT IN CAN BUS WIRES (STEERING ANGLE SENSOR)
Reconnect the steering angle sensor connector.
*1 | DLC3 |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
REPLACE SPIRAL CABLE W/STEERING SENSOR SUB-ASSEMBLY |
OK |
CHECK FOR SHORT IN CAN BUS WIRES (POWER STEERING ECU)
Reconnect the power steering ECU connector.
*1 | DLC3 |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
REPLACE POWER STEERING ECU |
OK |
CHECK FOR SHORT IN CAN BUS WIRES (YAW RATE SENSOR)
Reconnect the yaw rate sensor connector.
*1 | DLC3 |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
REPLACE YAW RATE SENSOR ASSEMBLY |
OK |
CHECK FOR SHORT IN CAN BUS WIRES (POWER MANAGEMENT CONTROL ECU)
Reconnect the power management control ECU connector.
*1 | DLC3 |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
REPLACE POWER MANAGEMENT CONTROL ECU |
OK |
CHECK FOR SHORT IN CAN BUS WIRES (CENTER AIRBAG SENSOR ASSEMBLY)
Reconnect the center airbag sensor assembly connector.
*1 | DLC3 |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
REPLACE CENTER AIRBAG SENSOR ASSEMBLY |
OK |
REPLACE MULTIPLEX NETWORK BODY ECU (MAIN BODY ECU)
CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 2 J/C - CAN NO. 1 J/C)
Reconnect the CAN No. 1 junction connector.
*1 | Front view of wire harness connector (to CAN No. 2 Junction Connector) |
*2 | 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 BRANCH WIRE OR CONNECTOR (CAN NO. 1 J/C - CAN NO. 2 JUNCTION CONNECTOR) |
OK |
CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 2 J/C - CERTIFICATION ECU)
*1 | Front view of wire harness connector (to CAN No. 2 Junction Connector) |
*2 | to Certification ECU |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
CHECK FOR SHORT IN CAN BUS WIRES (CERTIFICATION ECU) Click here |
OK |
CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 2 J/C - SKID CONTROL ECU)
*1 | Front view of wire harness connector (to Skid Control ECU) |
Disconnect the skid control ECU connector.
*2 | Front view of wire harness connector (to CAN No. 2 Junction Connector) |
*3 | to Skid Control ECU |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
Result | ||||||||
---|---|---|---|---|---|---|---|---|
|
B |
CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 2 J/C) Click here |
C |
REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 2 J/C - SKID CONTROL ECU) |
A |
CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 2 J/C - MULTI-MEDIA MODULE OR RADIO RECEIVER)
w/ Navigation system
*1 | Front view of wire harness connector (to Multi-media Module Receiver Assembly) |
Disconnect the multi-media module receiver assembly connector.
w/ Audio and visual system (w/ Multi-display)
*2 | Front view of wire harness connector ((to Radio Receiver Assembly) |
Disconnect the radio receiver assembly connector.
*3 | Front view of wire harness connector (to CAN No. 2 Junction Connector) |
*4 |
|
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 - MULTI-MEDIA MODULE OR RADIO RECEIVER) |
OK |
CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 2 J/C)
Reconnect the CAN No. 1 and No. 2 junction connectors.
*1 | DLC3 |
Measure the resistance according to the value(s) in the table below.
Note
The resistance must be measured after the main wire connected ECUs (ECM and certification ECU), and the CAN No. 1 and No. 2 junction connectors are reconnected.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
Result | ||||||||
---|---|---|---|---|---|---|---|---|
|
B |
REPLACE BRAKE ACTUATOR (SKID CONTROL ECU) |
C |
REPLACE CAN NO. 2 JUNCTION CONNECTOR |
A |
CHECK FOR SHORT IN CAN BUS WIRES (SKID CONTROL ECU)
Reconnect the skid control ECU connector.
*1 | DLC3 |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
Result | ||||||||
---|---|---|---|---|---|---|---|---|
|
B |
REPLACE RADIO RECEIVER ASSEMBLY (W/ AUDIO AND VISUAL SYSTEM (W/ MULTI-DISPLAY)) |
C |
REPLACE BRAKE ACTUATOR (SKID CONTROL ECU) |
A |
REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY (W/ NAVIGATION SYSTEM)
CHECK FOR SHORT IN CAN BUS WIRE (ECM)
*A | for 2GR-FE |
*B | for 1AR-FE |
*1 | Front view of wire harness connector (to ECM) |
Disconnect the ECM connector.
*2 | Front view of wire harness connector (to CAN No. 1 Junction Connector) |
*3 | to ECM |
Disconnect the CAN No. 1 junction connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
Result | ||||||||
---|---|---|---|---|---|---|---|---|
|
B |
REPLACE ECM Click here |
C |
REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (CAN NO. 1 J/C - ECM) |
A |
REPLACE ECM Click here
CHECK FOR SHORT IN CAN BUS WIRES (CERTIFICATION ECU)
*1 | Front view of wire harness connector (to Certification ECU) |
Disconnect the certification ECU connector.
*1 | Front view of wire harness connector (to CAN No. 2 Junction Connector) |
*2 | to Certification ECU |
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 - CERTIFICATION ECU) |
OK |
REPLACE SMART KEY ECU ASSEMBLY (CERTIFICATION ECU)