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• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Driver Door Uncatch High Control | B250B 02 | B251B 04 | B250B 01 | - |
Driver Door Uncatch Low Control | B250B 02 | B251B 04 | B250B 01 | -- |
When any exterior door handle is lifted, switched ground signals are sent to the keyless entry control module through the door handle switch signal circuits. Upon receipt of these inputs, the keyless entry control module will check the door lock status of the following inputs:
• | Door unlock switch activation |
• | Keyless entry unlock command |
• | Passive keyless entry unlock command message is received by the keyless entry control module |
Once the enable criteria have been met, the keyless entry control module will supply power and ground to door catch control circuits and the door will release.
Battery voltage is between 9-16 V.
The keyless entry control module detects a short-circuit to battery in the driver door release motor release control low circuit.
The keyless entry control module detects a short-circuit to ground in the driver door release motor release control low circuit.
The keyless entry control module ignores inputs from the driver exterior door handle switch.
• | The DTC will be current for as long as the fault is present. |
• | When the fault is no longer present, the DTC will be a history DTC. |
• | A history DTC will clear after 50 ignition cycles. |
Door Lock/Indicator Schematics
Power Door Locks Description and Operation
Control Module References for scan tool information
Ignition ON, command the body control module Driver Door Unlatch to Unlatch and return to Idle. The driver door latch should Unlatch when commanded.
⇒ | If the test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, replace the K84 Keyless Entry Control Module. |
⇒ | If the test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, replace the K84 Keyless Entry Control Module. |
⇒ | If the test lamp illuminates, test the control circuit for a short to ground. If the circuit tests normal, replace the K84 Keyless Entry Control Module. |
⇒ | If the test lamp illuminates, test the control circuit for a short to ground. If the circuit tests normal, replace the K84 Keyless Entry Control Module. |
⇒ | If the test lamp does not illuminate, test the control circuits for an open/high resistance. If the circuits test normal, replace K84 Keyless Entry Control Module. |
⇒ | If the function does not perform as specified, replace the A23D Door Latch Assembly - Driver. |
⇒ | If the function does not perform as specified, replace the A23D Door Latch Assembly - Driver. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for keyless entry control module replacement, setup, and programming |
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