Pinpoint Test C: The Door Locks Operate Only One Way
Locks, Latches and Entry Systems
Pinpoint Tests
Pinpoint Test C: The Door Locks Operate Only One Way
Refer to Wiring Diagram Set 117, Remote Keyless Entry and Alarm for schematic and connector information. Diagrams By Number
Normal Operation
The Smart Junction Box (SJB) sends voltage signals to the door lock control switches through circuits CPL42 (GY/YE) and CPL43 (VT/GY) for the lock and unlock requests. When the lock or unlock switch is pressed, the voltage signal is routed to ground.
The SJB contains internal relays that are energized depending on input received. When the SJB receives a lock or unlock request from the door lock control switch, the SJB energizes the appropriate relay(s) to lock or unlock the doors.
The side and rear cargo doors equipped with the E-Guard Cargo Protection(TM), will only unlock with the key from outside of the vehicle. All doors will lock with a command from a Remote Keyless Entry (RKE) transmitter or door lock control switch, but only the front doors will unlock from an RKE or door lock control switch command.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Door lock control switch
- SJB
PINPOINT TEST C: THE DOOR LOCKS OPERATE ONLY ONE WAY
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: For vehicles equipped with the E-Guard Cargo Protection SystemTM, the side and rear cargo doors will not unlock electronically or from the interior door lock rod. The side and rear cargo doors with the E-Guard Cargo Protection SystemTM can only be unlocked with a key in the door lock cylinder or the interior emergency release handle.
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C1 RETRIEVE THE RECORDED SJB DTCs FROM THE SELF-TEST
- Check for recorded SJB DTCs from the self-test.
- Is DTC B2A25 present?
Yes
Go To Pinpoint Test E. Pinpoint Test E: DTC B2A25
No
GO to C2.
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C2 CHECK THE SUSPECT DOOR LOCK CONTROL SWITCH
- Disconnect: Suspect Door Lock Control Switch.
- Carry out the door lock control switch component test.
- Is the door lock control switch OK?
Yes
GO to C3.
No
INSTALL a new door lock control switch for the switch in question. REFER to Door Lock Control Switch - Front Door Door Lock Control Switch - Front Door or Door Lock Control Switch - Rear Door Door Lock Control Switch - Rear Door. TEST the system for normal operation.
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C3 CHECK CIRCUITS CPL42 (GY/YE) AND CPL43 (VT/GY) FOR AN OPEN
- Ignition OFF.
- Disconnect: SJB C2280c.
- If the doors do not lock, measure the resistance between the suspect door lock control switch and SJB as follows:
- If the doors do not unlock, measure the resistance between the suspect door lock control switch and SJB as follows:
- Are the resistances less than 5 ohms?
Yes
GO to C4.
No
REPAIR the circuit in question. TEST the system for normal operation.
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C4 CHECK FOR CORRECT SJB OPERATION
- Disconnect all the SJB connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the SJB connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes
INSTALL a new SJB. TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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