The remote control door lock receiver (RCDLR) communicates with the body control module (BCM) through the keyless entry serial data circuit. When any button on the keyless entry transmitter is pressed, the transmitter sends a signal to the RCDLR. The RCDLR sends either a lock or unlock request to the BCM, depending on which button is pressed on the transmitter. The BCM receives the message and performs the appropriate function.
The system voltage must be between 9.0 and 16.0 volts.
The keyless entry serial data circuit is shorted to ground for 500 milliseconds.
The keyless entry system does not operate.
• | The current DTC will clear on after the short to ground is corrected. |
• | A history DTC will clear after 100 consecutive ignition cycles without a fault present. |
• | A scan tool may be used in order to clear history and current DTC(s). |
The numbers below refer to the step numbers on the diagnostic table.
The normal state of the input displayed on the scan tool before pressing a transmitter button is NONE.
When the UNLOCK button is pressed on the transmitter, Actv Unlock Fob# will be displayed on the scan tool.
The normal state of the input displayed on the scan tool before pressing a transmitter button is NONE.
Tests the signal circuit for a short to ground.
Step | Action | Yes | No |
---|---|---|---|
Schematic Reference: Keyless Entry Schematics | |||
1 | Did you perform the Remote Keyless Entry Diagnostic System Check? | Go to Step 2 | |
Does the scan tool display NONE? | Go to Step 3 | Go to Step 4 | |
Does the RFA Message Since Wake-up parameter change state? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 4 | |
Does the scan tool display NONE? | Go to Step 7 | Go to Step 5 | |
Test the keyless entry serial data 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 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 10 | Go to Step 8 |
7 | Inspect for poor connections at the harness connector of the RCDLR. 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 |
8 |
Important: Perform the BCM programming procedure when replacing the BCM. Replace the BCM. Refer to Body Control Module Replacement in Body Control System. Did you complete the replacement? | Go to Step 10 | -- |
9 | Replace the Remote Control Door Lock Receiver. Refer to Remote Control Door Lock Receiver Replacement . Did you complete the replacement? | Go to Step 10 | -- |
10 |
Does the DTC reset? | Go to Step 2 | System OK |