Circuit Description
The LF and RF door lock cylinder switches provide a ground input to the body control module (BCM) when either of the switches are turned to the unlock position. This input is needed for the optional content Theft Deterrent System when the keyless entry feature does not unlock the doors.
DTC Descriptors
This diagnostic procedure supports the following DTCs:
| • | DTC B3064 Right Front/Left Front Door Key Lock Switch Circuit Low |
| • | DTC B3069 Right Front/Left Front Door Key Unlock Switch Circuit Low |
Conditions for Setting the DTC
The BCM detects the door lock key switch signal circuit as continuously active for greater than 60 seconds.
Action Taken When the DTC Sets
| • | The BCM stores DTC B3069 in memory. |
| • | The BCM will disable the input and all operations of the input until the fault no longer exists. |
Conditions for Clearing the DTC
| • | The BCM no longer detects the short to ground for greater than 60 seconds. |
| • | 100 consecutive ignition cycles have been recorded without the DTC being detected. |
Diagnostic Aids
| • | If the DTC B3069 is a history DTC, the fault may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. |
| • | The following conditions may cause an intermittent malfunction to occur: |
| - | An intermittent short to ground in the key unlock input circuit |
| - | The key cylinder switch is intermittently shorted to ground internally. |
| - | The BCM is intermittently shorted to ground internally. |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
This step determines whether the short to ground is in the door lock cylinder switches or the door lock key switch unlock signal circuit.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Door Lock/Indicator Schematics Connector End View Reference: Power Door Systems Connector End Views , Computer/Integrating Systems Connector End Views in Computer/Integrating Systems, or Electrical Center Identification Views in Wiring Systems | |||
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 scan tool display Inactive? | Go to Diagnostic Aids | Go to Step 3 | |
Does the scan tool display Inactive? | Go to Step 4 | Go to Step 5 | |
Does the scan tool display Inactive? | Go to Step 7 | Go to Step 8 | |
5 | Test the door lock key switch unlock signal 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 10 | Go to Step 6 |
6 | Inspect for poor connections at the harness connector of the 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 10 | Go to Step 9 |
7 | Replace the RF door lock cylinder switch. Refer to Front Side Door Lock Replacement . Did you complete the replacement? | Go to Step 10 | -- |
8 | Replace the LF door lock cylinder switch. Refer to Front Side Door Lock Replacement . Did you complete the replacement? | Go to Step 10 | -- |
9 | 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 10 | -- |
10 |
Does the DTC reset? | Go to Step 2 | System OK |
