Pinpoint Test C: The Door Locks Operate Only One Way
Handles, Locks, Latches and Entry Systems
Pinpoint Test C: The Door Locks Operate Only One Way
Normal Operation
The Smart Junction Box (SJB) sends voltage signals to the door lock control switches through the lock and unlock input circuits. When the lock or unlock switch is pressed, the corresponding voltage signal is routed to ground, signaling the SJB (Smart Junction Box) to lock or unlock the doors. The door lock control switches have a dedicated ground circuit.
The side and rear cargo doors equipped with the E-Guard Cargo Protection(TM), only unlock with the key from outside of the vehicle. All doors lock with a command from a Remote Keyless Entry (RKE) transmitter or door lock control switch, but only the front doors unlock from an RKE (Remote Keyless Entry) or door lock control switch command.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Door lock control switch
- SJB (Smart Junction Box)
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 System(TM), the side and rear cargo doors do not unlock electronically or from the interior door lock rod. The side and rear cargo doors with the E-Guard Cargo Protection System(TM) can only be unlocked with a key in the door lock cylinder or the interior emergency release handle.
C1 RETRIEVE THE RECORDED SJB (Smart Junction Box) DTCs FROM THE SELF-TEST
- Check for recorded SJB (Smart Junction Box) DTCs from the self-test.
Is DTC B2A25 present?
Yes
GO to Pinpoint Test E. Pinpoint Test E: DTC B2A25
No
GO to C2.
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.
C3 CHECK THE LOCK INPUT OR UNLOCK INPUT CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: SJB (Smart Junction Box) C2280C.
- If the doors do not lock, measure the resistance between the suspect door lock control switch and SJB (Smart Junction Box) as follows:
Suspect Door Lock Switch Connector-Pin Circuit SJB (Smart Junction Box) Connector-Pin LH C505-1CPL42 (GY/YE) C2280C-17 RH C605-1CPL42 (GY/YE) C2280C-17 Rear C4121-2CPL42 (GY/YE) C2280C-17
- If the doors do not unlock, measure the resistance between the suspect door lock control switch and SJB (Smart Junction Box) as follows:
Suspect Door Lock Switch Connector-Pin Circuit SJB (Smart Junction Box) Connector-Pin LH C505-3CPL43 (VT/GY) C2280C-4 RH C605-3CPL43 (VT/GY) C2280C-4 Rear C4121-6CPL43 (VT/GY) C2280C-4
Are the resistances less than 5 ohms?
Yes
GO to C4.
No
REPAIR the circuit in question for an open. TEST the system for normal operation.
C4 CHECK FOR CORRECT SJB (Smart Junction Box) OPERATION
- Disconnect all the SJB (Smart Junction Box) connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the SJB (Smart Junction Box) 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 (Smart Junction Box). 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.