PINPOINT TEST C : The Door Locks Operate Only One Way
- C1 CHECK THE BCM DTCs FROM THE SELF-TEST
- Using a scan tool, perform the BCM self-test.
Is DTC B126A:01 present?
Yes GO to Pinpoint Test E . No GO to C2. - C2 VERIFY THE OPERATION OF BOTH DOOR LOCK CONTROL SWITCHES
- Ignition OFF.
- Press the lock and unlock button of both door lock control switches while observing the door lock operation.
Do the door locks operate only one way from both switches?
Yes GO to C5. No GO to C3. - C3 CHECK THE LOCK INPUT CIRCUIT FOR AN OPEN (SINGLE SWITCH INOPERATIVE)
- Disconnect: Suspect Door Lock Control Switch.
- Unlock the doors from the working door lock control switch.
- For the LH door lock control switch, connect a fused jumper wire:
Positive Lead Measurement / Action Negative Lead C541-7 C541-6
- For the RH door lock control switch, connect a fused jumper wire:
RH Door Lock Control Switch RH Door Lock Control Switch C605 C605 Pin Circuit Measurement / Action Pin Circuit 4 CPK19 (BU/GN) 3 GD348 (BK/YE)
Do the doors lock with the jumper wire?
Yes REMOVE the jumper wire. GO to C4. No REMOVE the jumper wire. REPAIR the circuit. - C4 CHECK THE UNLOCK INPUT CIRCUIT FOR AN OPEN (SINGLE SWITCH INOPERATIVE)
- For the LH door lock control switch, connect a fused jumper wire:
Positive Lead Measurement / Action Negative Lead C541-8 C541-6
- For the RH door lock control switch, connect a fused jumper wire:
RH Door Lock Control Switch RH Door Lock Control Switch C605 C605 Pin Circuit Measurement / Action Pin Circuit 2 CPK23 (YE/VT) 3 GD348 (BK/YE)
Do the doors unlock with the jumper wire?
Yes REMOVE the jumper wire. INSTALL a new door lock control switch. REFER to Door Lock Control Switch . No REMOVE the jumper wire. REPAIR the circuit. - For the LH door lock control switch, connect a fused jumper wire:
- C5 CHECK THE LOCK INPUT OR THE UNLOCK INPUT CIRCUIT FOR AN OPEN (BOTH SWITCHES INOPERATIVE)
- Disconnect: LH Door Lock Control Switch.
- Disconnect: BCM C2280C.
- Measure:
BCM LH Door Lock Control Switch C2280C C541 Pin Circuit Measurement / Action Pin Circuit 6 CPK19 (BU/GN) 7 CPK19 (BU/GN) 8 CPK23 (YE/VT) 8 CPK23 (YE/VT)
Are the resistances less than 3 ohms?
Yes GO to C6. No REPAIR the affected circuit. - C6 CHECK FOR CORRECT BCM OPERATION
- Ignition OFF.
- Disconnect and inspect all BCM connectors.
- Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary
- Reconnect the BCM connectors. Make sure they seat and latch correctly.
- Operate the system and determine if the concern is still present.
Is the concern still present?
Yes CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new BCM. REFER to Multifunction Electronic Modules . No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
