Pinpoint Test A: All Door Locks Are Inoperative
Handles, Locks, Latches and Entry Systems
Pinpoint Tests
Pinpoint Test A: All Door Locks Are Inoperative
Refer to Wiring Diagram Set 110, Power Door Locks for schematic and connector information. Diagrams By Number
Normal Operation
The Smart Junction Box (SJB) fuse 6 (20A) provides voltage for the power lock/unlock system. Ground for the power lock/unlock system is internal to the SJB. The SJB contains internal relays that are energized depending on input received.
Upon a lock request, the SJB supplies voltage on the all door and liftgate lock circuit and ground on the driver, passenger door, and liftgate unlock circuits. Upon an unlock request, the voltage and ground are reversed on the previously listed circuits. When the door lock and unlock relays are not energized they are connected to ground.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- SJB
PINPOINT TEST A: ALL DOOR LOCKS ARE INOPERATIVE
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
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A1 VERIFY THE OPERATION OF BOTH DOOR LOCK CONTROL SWITCHES
- Press the lock and unlock button of both door lock control switches while observing the door lock operation.
- Are the door locks inoperative from both switches?
Yes
GO to A2.
No
GO to Pinpoint Test D. Pinpoint Test D: All Door Locks Are Inoperative From One Switch
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A2 RETRIEVE THE RECORDED SJB DTCs FROM THE CONTINUOUS AND ON-DEMAND SELF-TESTS
- Check for recorded SJB DTCs from the continuous and on-demand self-tests.
- Is DTC B1300, DTC B1982, DTC B2250, DTC B2574, DTC B2575 or DTC B2671 recorded?
Yes
For DTC B2574 and DTC B2575, GO to Pinpoint Test E. Pinpoint Test E: DTC B2574 Or DTC B2575
For DTC B1300, DTC B1982, DTC B2250, and DTC B2671, GO to Pinpoint Test F. Pinpoint Test F: DTC B1300, DTC B1982, DTC B2250, Or DTC B2671
No
GO to A3.
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A3 CHECK THE ALL LOCK CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: SJB C2280a .
- Disconnect: LH Front Door Lock Actuator C525 .
- Measure the resistance between the LH front door lock actuator C525-1, circuit CPL11 (GY/BN), harness side and the SJB C2280a-4, circuit CPL11 (GY/BN), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to A4.
No
REPAIR circuit CPL11 (GY/BN) for an open. TEST the system for normal operation.
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A4 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. REFER to Body Control Systems. 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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