| 1 |
INSPECT FOR MALFUNCTION IN BCM POWER SUPPLY CIRCUIT OR ELSEWHERE
- Did any of the following items operate during the keyless entry system operation inspection?
- All doors lock/unlock
- Hazard wiring light flashes
|
Yes |
Go to the next step. |
| No |
Inspect the connection of the BCM connectors, and go to Step 4. |
| 2 |
INSPECT FOR MALFUNCTION IN KEYLESS SWITCH OR ELSEWHERE
- Did the following item operate during the keyless entry system operation inspection?
|
Yes |
Go to the next step |
| No |
Go to Step 9. |
| 3 |
INSPECT FOR MALFUNCTION IN DOOR LOCK ACTUATOR OR ELSEWHERE
- Did the following item operate during the keyless entry system operation inspection?
- Hazard warning light flashes
|
Yes |
Go to the next step. |
| No |
Go to Step 11. |
| *4 |
INSPECT BCM POWER SUPPLY CIRCUIT
- Are the BCM power supply and voltage normal?
- IG1 signal (terminal 3AB, 4A)
- B+ signal (terminal 2D, 2J, 4B, 4C)
|
Yes |
Go to the next step. |
| No |
- Inspect for burnt fuse
- Inspect the power supply system wiring harness for an open or short circuit.
- Then go to Step 14.
|
| *5 |
INSPECT BCM GROUND CIRCUIT
- Is the BCM ground voltage normal?
|
Yes |
Go to the next step. |
| No |
Inspect the ground system wiring harness for open circuit. Then go to Step 14 |
| *6 |
INSPECT DOOR SWITCH SIGNAL
- Monitor following BCM (door switch) PID using the M-MDS
- TR/LG_SW (Trunk lid latch switch)
- DRSW_P (Passenger's door latch switch)
- DRSW_D (Driver's door switch)
- Are monitored PID values normal?
|
Yes |
Go to the next step |
| No |
- Inspect for open or short circuit in wiring harness between BCM and suspected door latch/trunk lid latch switch
|
| *7 |
INSPECT DOOR SWITCH SIGNAL VOLTAGE
- Are the wiring harness between the BCM and each door latch switch normal?
- Inspect each terminal (8B, 8D, 8F, 8H) under the following conditions
- Door closed 1.0V or less
- Door open: B+
|
Yes |
Go to the next step |
| No |
- Inspect the door switch.
- Inspect the door switch system wiring harness for a short circuit
- Then go to Step 14
|
| 8 |
INSPECT KEYLESS SWITCH
- Is the keyless switch normal?
ON. 12V
OFF 0V |
Yes |
Replace the BCM |
| No |
Replace the keyless switch, then go to Step 14 |
| *9 |
INSPECT IF MALFUNCTION IS IN DOOR LOCK ACTUATOR, BCM GROUND CIRCUIT OR ELSEWHERE
- Measure the voltage at the BCM terminals 71, 7M and 7K while operating the transmitter
- All doors locked. 1.0 V or less
→ B+
→ 1.0 V or less
(7I terminal)
- All doors unlocked. 1.0 V or less
→ B+
→ 1.0 V or less
(7M terminal)
- Driver-side door unlocked 1.0 V or less
→ B+
→ 1.0 V or less
(7K terminal)
- Is the voltage as above?
|
Yes |
Go to the next step |
| No |
- Inspect the wiring harness between BCM and the door lock actuator for an open or short circuit.
- Inspect the door lock actuator
- Then go to Step 14
|
| 10 |
INSPECT DOOR LOCK LINKAGE
- Operate the key cylinder and verify the door locks and unlock manually
- Does every door lock system work?
|
Yes |
Go to step 12 |
| No |
Inspect the door lock linkage then go to Step 14 |
| *11 |
INSPECT FOR MALFUNCTION IN THEFT-DETERRENT SYSTEM OR ELSEWHERE
- Is the theft-deterrent system equipped?
|
Yes |
Go to the next step. |
| No |
Go to step 13 |
| 12 |
INSPECT BONNET SWITCH AND TRUNK SIGNAL
- Monitor following BCM PID using the M-MDS
- TR/LG_SW (trunk lid latch switch)
- HOOD_SW (bonnet latch switch)
- Are monitored PID values ON (open)?
|
Yes |
Normal operation (Hazard warning light flashing on vehicles with theft-deterrent system operates in conjunction with theft-deterrent system). |
| No |
Go to the next step |
| *13 |
INSPECT TURN LIGHT SIGNAL CIRCUIT
- Measure voltage at the BCM terminals 81,8J, 1P (right side turn signal), 8K, 8L and 1R (left side turn signal) while operating hazard and/ or turn signal on.
- Are the terminal voltages are alternated between 1.0V or less and B+
?
|
Yes |
Verify the malfunction symptom again. |
| No |
- Inspect the wiring harnesses between the BCM and each turn light for a short circuit.
- Inspect each turn light.
- If these items are normal, replace the BCM.
|
| *14 |
REINSPECT MALFUNCTION SYMPTOM AFTER REPAIR
- Does the keyless entry system operate properly?
|
Yes |
Troubleshooting completed. Explain repairs to the customer. |
| No |
Reinspect the malfunction symptoms, then repeat from Step 1 if the malfunction recurs. |