The body control module (BCM) internally grounds the driver door unlock relay control circuit for the driver door unlock relay when it receives a switched ground signal from any door lock switch or a keyless entry unlock transmission. When the BCM grounds the driver door unlock relay control circuit, the driver door unlock relay is energized and unlocks the driver door.
This diagnostic procedure supports the following DTC:
DTC B1017 Driver Door Unlock Relay Control
• | Battery voltage is between 9-16 volts. |
• | The DTC will set if the driver door unlock function is active or inactive. |
The DTC will set if the driver door unlock relay control circuit is shorted to ground or open for more than one second.
• | If a short to ground is present on the driver door unlock relay control circuit, the driver door unlock relay will be energized and the driver door lock actuator will be held in the unlock position and will not lock. |
• | If an open condition is present on the driver door unlock relay control circuit, the driver door will lock but not unlock. |
When the fault is no longer present, the BCM changes the current DTC to a history DTC. The BCM will clear the history DTC after 50 fault-free ignition cycles.
• | DTC B1017 could set if the driver door unlock relay winding is open. |
• | DTC B1017 could set if there is: |
- | A short to ground in the relay battery positive voltage circuit |
- | A short to ground in the driver door lock actuator unlock control circuit |
The numbers below refer to the step numbers on the diagnostic table.
Listen for an audible click when the driver door unlock relay operates. Command both the ON and OFF states. Repeat the commands as necessary.
This step tests for voltage at the coil side of the driver door unlock relay. The DRV LKS fuse supplies power to the coil side of the rear door unlock relay.
This step verifies that the BCM is providing ground to the driver door unlock relay.
This step tests if ground is constantly being applied to the driver door unlock relay.
Step | Action | Yes | No |
---|---|---|---|
Schematic Reference: Door Lock/Indicator Schematics Connector End View Reference: Power Door Systems Connector End Views | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
Does the driver door unlock relay turn ON and OFF with each command? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 | |
Does the test lamp illuminate? | Go to Step 4 | Go to Step 9 | |
Does the test lamp turn ON and OFF with each command? | Go to Step 8 | Go to Step 5 | |
Does the test lamp remain illuminated without being commanded? | Go to Step 7 | Go to Step 6 | |
6 | Test the driver door unlock relay control circuit for a poor connection or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 11 |
7 | Test the driver door unlock relay control circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 11 |
8 | Test for a short to ground in the driver door latch actuator unlock control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 10 |
9 | Repair an open or short to ground in the battery positive voltage circuit of the DRV UNLK relay. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 14 | Go to Step 12 |
10 | Inspect for poor connections at the DRV UNLK relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 12 |
11 | Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 13 |
12 | Replace the DRV UNLK relay. Refer to Relay Replacement . Did you complete the replacement? | Go to Step 14 | -- |
13 | Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 14 | -- |
14 |
Does the DTC reset? | Go to Step 2 | System OK |