Pinpoint Test K : A Single Or More Than One Door Lock Is Inoperative
- Refer to REMOTE KEYLESS ENTRY AND ALARM
for schematic and connector information.
Normal Operation and Fault Conditions
REFER to: Handles, Locks, Latches and Entry Systems - System Operation and Component Description .
Possible Sources
- Fuse
- Wiring, terminals or connectors
- Door lock actuator
- Door latch
- BCM
- NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
- K1 CHECK THE DOOR LATCH FOR BINDING
- Use the service information door lock to check for a binding lock. The manual door lock is a recessed circle located on the rear edge of the door just above the door latch opening
- Turn the manual door lock 1/8 turn toward the inside of the vehicle to lock the door in question.
- Turn the manual door lock 1/8 turn toward the outside of the vehicle to unlock the door in question.
Does the door lock and unlock?
Yes GO to K2 No INSTALL a new door latch.* For a front door latch, REFER to: Front Door Latch . * For a rear door latch, REFER to: Rear Door Latch . * For the tailgate latch, REFER to: Tailgate Latch . - Use the service information door lock to check for a binding lock. The manual door lock is a recessed circle located on the rear edge of the door just above the door latch opening
- K2 CHECK THE BCM (BODY CONTROL MODULE) ALL LOCK OUTPUT CIRCUIT FOR AN OPENNOTE: The following step uses a test lamp to simulate normal circuit loads. Use only a Rotunda Test Lamp (SGT27000) or 250-300mA incandescent bulb test lamp. To avoid connector terminal damage, use the Rotunda Flex Probe kit for the test lamp probe connection to the vehicle. Do not use the test lamp probe directly on any connector.
- Ignition OFF.
- Disconnect: Suspect door lock actuator.
- For the suspect door lock actuator, connect:
LHF Door Lock Actuator
Lead 1 Measurement / Action Lead 2 C525-7 Ground RHF Door Lock Actuator
Lead 1 Measurement / Action Lead 2 C609-2 Ground RHR Door Lock Actuator
Lead 1 Measurement / Action Lead 2 C805-2 Ground Tailgate Lock Actuator
Lead 1 Measurement / Action Lead 2 C4223B-2 Ground LHR Door Lock Actuator
Lead 1 Measurement / Action Lead 2 C705-7 Ground
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NOTE: The BCM only supplies voltage to the actuator momentarily. It is important to monitor the test lamp while pressing the door lock control switch.
While pressing the door lock control switch in the lock position, monitor the test lamp.
Does the test lamp momentarily illuminate?
Yes GO to K3 No REPAIR the circuit. - K3 CHECK THE BCM (BODY CONTROL MODULE) UNLOCK OUTPUT CIRCUIT FOR AN OPENNOTE: The following step uses a test lamp to simulate normal circuit loads. Use only a Rotunda Test Lamp (SGT27000) or 250-300mA incandescent bulb test lamp. To avoid connector terminal damage, use the Rotunda Flex Probe kit for the test lamp probe connection to the vehicle. Do not use the test lamp probe directly on any connector.
- For the suspect door latch, connect:
LHF Door Lock Actuator
Lead 1 Measurement / Action Lead 2 C525-8 Ground RHF Door Lock Actuator
Lead 1 Measurement / Action Lead 2 C609-1 Ground RHR Door Lock Actuator
Lead 1 Measurement / Action Lead 2 C805-1 Ground Tailgate Lock Actuator
Lead 1 Measurement / Action Lead 2 C4223B-1 Ground LHR Door Lock Actuator
Lead 1 Measurement / Action Lead 2 C705-8 Ground
-
NOTE: The BCM only supplies voltage to the actuator momentarily. It is important to monitor the test lamp while pressing the door lock control switch.
While pressing the door lock control switch in the unlock position, monitor the test lamp.
Does the test lamp momentarily illuminate?
Yes INSTALL a new door lock actuator in question. No REPAIR the circuit. - For the suspect door latch, connect: