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. |
|
*1: w/ Entry and Start System
*2: w/o Entry and Start System
*3: for Radio and Display Type
INSPECTION PROCEDURE
For vehicles with an entry and start system:
Before replacing the certification ECU, refer to the entry and start system (for Entry Function) (Click here).
Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.
PROCEDURE
PRECAUTION
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).
DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the CAN main wire and CAN branch wire.
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 (Click here).
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (DLC3 CAN BRANCH WIRE)
Disconnect the H88 No. 2 junction connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| *1 | Front view of DLC3 |
CONNECT CONNECTOR
Reconnect the H88 No. 2 junction connector.
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR SIDE)
Disconnect the A50 No. 1 junction connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| *1 | Front view of DLC3 |
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY)
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| *1 | Rear view of wire harness connector (to No. 1 Junction Connector) |
| *2 | Front view of DLC3 |
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 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| *1 | Rear view of wire harness connector (to No. 1 Junction Connector) |
| *2 | Front view of DLC3 |
CONNECT CONNECTOR
Reconnect the A50 No. 1 junction connector.
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (BRAKE ACTUATOR ASSEMBLY)
Disconnect the A52*1 or A54*2 brake actuator assembly (VSC ECU) connector.
| *1 | for AD Series Engine | *2 | for ZR Series Engine |
| *3 | Front view of wire harness connector (to Brake Actuator Assembly) |
*4 | Front view of DLC3 |
*1: for AD Series Engine
*2: for ZR Series Engine
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
|||||||||
|
CONNECT CONNECTOR
Reconnect the A50 No. 1 junction connector.
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (ECM)
Disconnect the A51 ECM connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
|||||||||
|
| *1 | Front view of wire harness connector (to ECM) |
| *2 | Front view of DLC3 |
| *3 | for AD Series Engine |
| *4 | for ZR Series Engine |
| Result | Proceed to |
|---|---|
| OK (for 1AD-FTV) | A |
| OK (for 2AD-FHV) | B |
| OK (for 1ZR-FAE) | C |
| OK (for 2ZR-FAE) | D |
| NG | E |
CONNECT CONNECTOR
Reconnect the A50 No. 1 junction connector.
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR)
Disconnect the H88 No. 2 junction connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| *1 | Rear view of wire harness connector (to No. 2 junction connector) |
| *2 | Front view of DLC3 |
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - POWER MANAGEMENT CONTROL ECU)
For vehicles without an entry and start system, go to "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 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| *1 | Rear view of wire harness connector (to No. 2 junction connector) |
| *2 | Front view of DLC3 |
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - CERTIFICATION ECU)
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| *1 | Rear view of wire harness connector (to No. 2 junction connector) |
| *2 | Front view of DLC3 |
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)
For vehicles with an entry and start system, go to "Check for Short to B+ in CAN Bus Wire (No. 2 Junction Connector - Power Steering ECU Assembly)".
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| *1 | Rear view of wire harness connector (to No. 2 junction connector) |
| *2 | Front view of DLC3 |
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - POWER STEERING ECU ASSEMBLY)
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| *1 | Rear view of wire harness connector (to No. 2 junction connector) |
| *2 | Front view of DLC3 |
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - RADIO AND DISPLAY RECEIVER ASSEMBLY)
For vehicles without a radio and display receiver type, go to "Check for Short to B+ in CAN Bus Wire (No. 2 Junction Connector - Spiral Cable Sub-assembly)".
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| *1 | Rear view of wire harness connector (to No. 2 junction connector) |
| *2 | Front view of DLC3 |
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - SPIRAL CABLE SUB-ASSEMBLY)
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| *1 | Rear view of wire harness connector (to No. 2 junction connector) |
| *2 | Front view of DLC3 |
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - YAW RATE SENSOR)
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| *1 | Rear view of wire harness connector (to No. 2 junction connector) |
| *2 | Front view of DLC3 |
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - MAIN BODY ECU)
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| *1 | Rear view of wire harness connector (to No. 2 junction connector) |
| *2 | Front view of DLC3 |
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - CENTER AIRBAG SENSOR ASSEMBLY)
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| *1 | Rear view of wire harness connector (to No. 2 junction connector) |
| *2 | Front view of DLC3 |
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| *1 | Rear view of wire harness connector (to No. 2 junction connector) |
| *2 | Front view of DLC3 |
CONNECT CONNECTOR
Reconnect the H88 No. 2 junction connector.
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (POWER MANAGEMENT CONTROL ECU)
Disconnect the H71 power management control ECU connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| *1 | Rear view of wire harness connector (to Power Management Control ECU) |
| *2 | Front view of DLC3 |
| Result | Proceed to |
|---|---|
| OK (for LHD) | A |
| OK (for RHD) | B |
| NG | C |
CONNECT CONNECTOR
Reconnect the H88 No. 2 junction connector.
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (CERTIFICATION ECU)
Disconnect the H51 certification ECU connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| *1 | Rear view of wire harness connector (to Certification ECU) |
| *2 | Front view of DLC3 |
CONNECT CONNECTOR
Reconnect the H88 No. 2 junction connector.
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (AIR CONDITIONING AMPLIFIER ASSEMBLY)
Disconnect the H46*1 or H9*2 air conditioning amplifier assembly connector.
| *1 | for Automatic Air Conditioning System | *2 | for Manual Air Conditioning System or w/o Air Conditioning System |
| *3 | Front view of wire harness connector (to Air Conditioning Amplifier Assembly) |
*4 | Front view of DLC3 |
*1: for Automatic Air Conditioning System
*2: for Manual Air Conditioning System or w/o Air Conditioning System
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
|||||||||
|
CONNECT CONNECTOR
Reconnect the H88 No. 2 junction connector.
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (POWER STEERING ECU ASSEMBLY)
Disconnect the H49 power steering ECU assembly connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| *1 | Front view of wire harness connector (to Power Steering ECU Assembly) |
| *2 | Front view of DLC3 |
CONNECT CONNECTOR
Reconnect the H88 No. 2 junction connector.
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (RADIO AND DISPLAY RECEIVER ASSEMBLY)
Disconnect the H105 radio and display receiver assembly connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| *1 | Front view of wire harness connector (to Radio and Display Receiver Assembly) |
| *2 | Front view of DLC3 |
CONNECT CONNECTOR
Reconnect the H88 No. 2 junction connector.
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (SPIRAL CABLE SUB-ASSEMBLY)
Disconnect the H69 spiral cable sub-assembly (steering angle sensor) connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| *1 | Rear view of wire harness connector (to Spiral Cable Sub-assembly) |
| *2 | Front view of DLC3 |
CONNECT CONNECTOR
Reconnect the H88 No. 2 junction connector.
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (YAW RATE SENSOR)
Disconnect the H68 yaw rate sensor connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| *1 | Front view of wire harness connector (to Yaw Rate Sensor) |
| *2 | Front view of DLC3 |
CONNECT CONNECTOR
Reconnect the H88 No. 2 junction connector.
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (MAIN BODY ECU)
Disconnect the H81 main body ECU (instrument panel junction block assembly) connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| *1 | Front view of wire harness connector (to Main Body ECU) |
| *2 | Front view of DLC3 |
CONNECT CONNECTOR
Reconnect the H88 No. 2 junction connector.
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (CENTER AIRBAG SENSOR ASSEMBLY)
Disconnect the H19 center airbag sensor assembly connector (Click here).
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| *1 | Rear view of wire harness connector (to Center Airbag Sensor Assembly) |
| *2 | Front view of DLC3 |
CONNECT CONNECTOR
Reconnect the H88 No. 2 junction connector.
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (COMBINATION METER ASSEMBLY)
Disconnect the H62 combination meter assembly connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| *1 | Rear view of wire harness connector (to Combination Meter Assembly) |
| *2 | Front view of DLC3 |
REPLACE COMBINATION METER ASSEMBLYClick here
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DLC3 (CANH, CANL)
REPLACE NO. 1 JUNCTION CONNECTOR
REPLACE BRAKE ACTUATOR ASSEMBLY (VSC ECU)Click here
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO BRAKE ACTUATOR ASSEMBLY (CANH, CANL)
REPLACE ECMClick here
REPLACE ECMClick here
REPLACE ECMClick here
REPLACE ECMClick here
REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO ECM (CANH, CANL)
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 2 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR)
REPLACE NO. 2 JUNCTION CONNECTOR
REPLACE POWER MANAGEMENT CONTROL ECUClick here
REPLACE POWER MANAGEMENT CONTROL ECUClick here
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO POWER MANAGEMENT CONTROL ECU (CA1H, CA1L)
REPLACE CERTIFICATION ECU
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO CERTIFICATION ECU (CANH, CANL)
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLYClick here
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO AIR CONDITIONING AMPLIFIER ASSEMBLY (CANH, CANL)
REPLACE POWER STEERING ECU ASSEMBLYClick here
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO POWER STEERING ECU ASSEMBLY (CANH, CANL)
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLYClick here
REPLACE CAN BRANCH WIRE CONNECTED TO RADIO AND DISPLAY RECEIVER ASSEMBLY (CANH, CANL)
REPLACE SPIRAL CABLE SUB-ASSEMBLYClick here
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO SPIRAL CABLE SUB-ASSEMBLY (CANH, CANL)
REPLACE YAW RATE SENSORClick here
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO YAW RATE SENSOR (CANH, CANL)
REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO MAIN BODY ECU (CANH, CANL)
REPLACE CENTER AIRBAG SENSOR ASSEMBLYClick here
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO CENTER AIRBAG SENSOR ASSEMBLY (CANH, CANL)
REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO COMBINATION METER ASSEMBLY (CANH, CANL)