Pinpoint Test

CHECK THE BCM DTCs FROM THE SELF-TEST
1. Using a scan tool, perform the BCM self-test.
Is DTC B126A:01 present?
- Yes: REFER to Diagnostic Routine E: B126A:01 .
- No: GO to 2 .
VERIFY THE OPERATION OF BOTH DOOR LOCK CONTROL SWITCHES
1. Ignition OFF.
2. 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 4.
- No: GO to 3 .

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:

LH Door Lock Control Switch			LH Door Lock Control Switch

C541			C541
Pin	Circuit	Measurement / Action	Pin	Circuit
7	CPK19 (BU/GN)		6	GD233 (BK)

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 4 .
No: REMOVE the jumper wire. REPAIR the circuit.

CHECK THE UNLOCK INPUT CIRCUIT FOR AN OPEN (SINGLE SWITCH INOPERATIVE)

For the LH door lock control switch, connect a fused jumper wire:

LH Door Lock Control Switch			LH Door Lock Control Switch

C541			C541
Pin	Circuit	Measurement / Action	Pin	Circuit
8	CPK23 (YE/VT)		6	GD233 (BK)

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.

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 6 .
No: REPAIR the affected circuit.

CHECK FOR CORRECT BCM OPERATION
1. Ignition OFF.
2. Disconnect and inspect all BCM connectors.
3. 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
4. Reconnect the BCM connectors. Make sure they seat and latch correctly.
5. 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 BODY CONTROL MODULE (BCM) - WITH INTELLIGENT ACCESS (IA) .
- 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.