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/ VSC
*3: w/ Display
*4: w/ Air Conditioning System
*5: w/ Stop and Start System
WIRING DIAGRAM
CAUTION / NOTICE / HINT
Note
Turn the ignition switch off before measuring the resistances of the CAN main wire and the CAN branch wire.
After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not in operation.
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 doors need to be opened in order to check connectors, open the doors and leave them open.
Tech Tips
Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.
PROCEDURE
CHECK SHORT TO B+ IN CAN BUS WIRE (DLC3 BRANCH WIRE)
Turn the ignition switch off.
Disconnect the F83 No. 2 junction connector.
| *a | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (DLC3 BRANCH WIRE) |
| OK |
|
CONNECT CONNECTOR
Reconnect the F83 No. 2 junction connector.
| NEXT |
|
CHECK SHORT TO B+ IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR)
Disconnect the A61 and F82 No. 1 junction connectors.
| *a | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
CHECK SHORT TO B+ IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR) Click here |
| OK |
|
CHECK SHORT TO B+ IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - ECM)
| *a | Rear view of wire harness connector (to No. 1 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
CHECK SHORT TO B+ IN CAN BUS WIRE (ECM MAIN WIRE) Click here |
| OK |
|
CHECK SHORT TO B+ IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)
| *a | Rear view of wire harness connector (to No. 1 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
CHECK SHORT TO B+ IN CAN BUS WIRE (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) BRANCH WIRE) Click here |
| OK |
|
CHECK AND REPLACE SHORT TO B+ IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - ENGINE STOP AND START ECU)
Tech Tips
For vehicles without stop and start system, go to step 7.
| *a | Rear view of wire harness connector (to No. 1 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
CHECK SHORT TO B+ IN CAN BUS WIRE (ENGINE STOP AND START ECU BRANCH WIRE) Click here |
| OK |
|
CHECK SHORT TO B+ IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))
| *a | Rear view of wire harness connector (to No. 1 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| OK |
|
REPLACE NO. 1 JUNCTION CONNECTOR |
| NG |
|
CHECK SHORT TO B+ IN CAN BUS WIRE (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) BRANCH WIRE) Click here |
CHECK SHORT TO B+ IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR)
Disconnect the F83 No. 2 junction connector.
| *a | Rear view of wire harness connector (to No. 2 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (NO. 1 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR) |
| OK |
|
CONNECT CONNECTOR
Reconnect the A61 and F82 No. 1 junction connectors.
| NEXT |
|
CHECK SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)
| *a | Rear view of wire harness connector (to No. 2 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
CHECK SHORT TO B+ IN CAN BUS WIRE (COMBINATION METER ASSEMBLY MAIN WIRE) Click here |
| OK |
|
CHECK SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)
Tech Tips
For vehicles without air conditioning system, go to step 12.
| *a | Rear view of wire harness connector (to No. 2 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
CHECK SHORT TO B+ IN CAN BUS WIRE (AIR CONDITIONING AMPLIFIER ASSEMBLY BRANCH WIRE) Click here |
| OK |
|
CHECK SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - STEERING ANGLE SENSOR (SPIRAL CABLE SUB-ASSEMBLY))
Tech Tips
For vehicles without VSC, go to step 13.
| *a | Rear view of wire harness connector (to No. 2 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
CHECK SHORT TO B+ IN CAN BUS WIRE (STEERING ANGLE SENSOR (SPIRAL CABLE SUB-ASSEMBLY) BRANCH WIRE) Click here |
| OK |
|
CHECK SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - POWER STEERING ECU ASSEMBLY)
| *a | Rear view of wire harness connector (to No. 2 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
CHECK SHORT TO B+ IN CAN BUS WIRE (POWER STEERING ECU ASSEMBLY) Click here |
| OK |
|
CHECK SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - RADIO AND DISPLAY RECEIVER ASSEMBLY)
Tech Tips
For vehicles without display, go to step 15.
| *a | Rear view of wire harness connector (to No. 2 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
CHECK SHORT TO B+ IN CAN BUS WIRE (RADIO AND DISPLAY RECEIVER ASSEMBLY BRANCH WIRE) Click here |
| OK |
|
CHECK SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))
Tech Tips
For vehicles without entry and start system, go to step 7.
| *a | Rear view of wire harness connector (to No. 2 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| NG |
|
CHECK SHORT TO B+ IN CAN BUS WIRE (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) BRANCH WIRE) Click here |
| OK |
|
CHECK SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - CENTER AIRBAG SENSOR ASSEMBLY)
| *a | Rear view of wire harness connector (to No. 2 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| OK |
|
REPLACE NO. 2 JUNCTION CONNECTOR |
| NG |
|
CHECK SHORT TO B+ IN CAN BUS WIRE (CENTER AIRBAG SENSOR ASSEMBLY BRANCH WIRE) Click here |
CHECK SHORT TO B+ IN CAN BUS WIRE (ECM MAIN WIRE)
Disconnect the A58*1, A93*2 or A108*3 ECM connector.
*1: for 2NR-FKE
*2: for 1KR-FE
*3: for 1ND-TV with DPF
| *a | Rear view of wire harness connector (to No. 1 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| Result | Proceed to |
|---|---|
| NG | A |
| OK (for 2NR-FKE) | B |
| OK (for 1KR-FE) | C |
| OK (for 1ND-TV with DPF) | D |
| A |
|
REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (ECM MAIN WIRE) |
| B |
|
REPLACE ECM Click here |
| C |
|
REPLACE ECM Click here |
| D |
|
REPLACE ECM Click here |
CHECK SHORT TO B+ IN CAN BUS WIRE (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) BRANCH WIRE)
Disconnect the A78 skid control ECU (brake actuator assembly) connector.
| *a | Rear view of wire harness connector (to No. 1 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| OK |
|
REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) Click here |
| NG |
|
REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) BRANCH WIRE) |
CHECK SHORT TO B+ IN CAN BUS WIRE (ENGINE STOP AND START ECU BRANCH WIRE)
Disconnect the F131 engine stop and start ECU connector.
| *a | Rear view of wire harness connector (to No. 1 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| OK |
|
REPLACE ENGINE STOP AND START ECU Click here |
| NG |
|
REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (ENGINE STOP AND START ECU BRANCH WIRE) |
CHECK SHORT TO B+ IN CAN BUS WIRE (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) BRANCH WIRE)
Disconnect the F76 main body ECU (multiplex network body ECU) connector.
| *a | Rear view of wire harness connector (to No. 1 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| OK |
|
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here |
| NG |
|
REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) BRANCH WIRE) |
CHECK SHORT TO B+ IN CAN BUS WIRE (COMBINATION METER ASSEMBLY MAIN WIRE)
Disconnect the F1 combination meter assembly connector.
| *a | Rear view of wire harness connector (to No. 2 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| OK |
|
REPLACE COMBINATION METER ASSEMBLY Click here |
| NG |
|
REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (COMBINATION METER ASSEMBLY MAIN WIRE) |
CHECK SHORT TO B+ IN CAN BUS WIRE (AIR CONDITIONING AMPLIFIER ASSEMBLY BRANCH WIRE)
Disconnect the F42*1 or F41*2 air conditioning amplifier assembly connector.
*1 : w/ Automatic Air Conditioning System
*2 : w/ Manual Air Conditioning System
| *a | Rear view of wire harness connector (to No. 2 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| OK |
|
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here |
| NG |
|
REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY BRANCH WIRE) |
CHECK SHORT TO B+ IN CAN BUS WIRE (STEERING ANGLE SENSOR (SPIRAL CABLE SUB-ASSEMBLY) BRANCH WIRE)
Disconnect the F30 steering angle sensor (spiral cable sub-assembly) connector.
| *a | Rear view of wire harness connector (to No. 2 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| OK |
|
REPLACE STEERING ANGLE SENSOR (SPIRAL CABLE SUB-ASSEMBLY) Click here |
| NG |
|
REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (STEERING ANGLE SENSOR (SPIRAL CABLE SUB-ASSEMBLY) BRANCH WIRE) |
CHECK SHORT TO B+ IN CAN BUS WIRE (POWER STEERING ECU ASSEMBLY)
Disconnect the F6 power steering ECU assembly connector.
| *a | Rear view of wire harness connector (to No. 2 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| OK |
|
REPLACE POWER STEERING ECU ASSEMBLY Click here |
| NG |
|
REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (POWER STEERING ECU ASSEMBLY BRANCH WIRE) |
CHECK SHORT TO B+ IN CAN BUS WIRE (RADIO AND DISPLAY RECEIVER ASSEMBLY BRANCH WIRE)
Disconnect the F115 radio and display receiver assembly connector.
| *a | Rear view of wire harness connector (to No. 2 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| OK |
|
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here |
| NG |
|
REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY BRANCH WIRE) |
CHECK SHORT TO B+ IN CAN BUS WIRE (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) BRANCH WIRE)
Disconnect the F63 certification ECU (smart key ECU assembly) connector.
| *a | Rear view of wire harness connector (to No. 1 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| OK |
|
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
| NG |
|
REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) BRANCH WIRE) |
CHECK SHORT TO B+ IN CAN BUS WIRE (CENTER AIRBAG SENSOR ASSEMBLY BRANCH WIRE)
Disconnect the F16 center airbag sensor assembly connector.
| *a | Rear view of wire harness connector (to No. 2 Junction Connector) |
| *b | Front view of DLC3 |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| OK |
|
REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here |
| NG |
|
REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CENTER AIRBAG SENSOR ASSEMBLY BRANCH WIRE) |