Circuit Description
The exterior trunk release switch is located just under the lip of the deck lid in the license plate pocket area. As a vehicle with locked doors is approached with a key fob and the exterior trunk release switch is pressed, the keyless entry antenna transmitter broadcasts a challenge approximately in a 1-meter range to the key fob. If the response from the key fob via radio frequency (RF) is a valid response, the locked door will be passively unlocked/unlatched allowing the trunk to be opened.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B3618 Exterior Trunk Release Switch Circuit
Conditions for Running the DTC
The remote control door lock receiver (RCDLR) will only run the DTC when the vehicle system voltage is greater than 9 volts.
Conditions for Setting the DTC
The RCDLR will set DTC B3618 when the exterior trunk release switch circuit is shorted to ground for more than 3 minutes.
Action Taken When the DTC Sets
The RCDLR will set and store a DTC B3618.
Conditions for Clearing the DTC
| • | The RCDLR no longer detects an open, short to power or short to ground on the exterior trunk release switch circuit. |
| • | The use of a scan tool |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
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This step verifies that DTC B3618 is a current DTC.
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This step tests for a ground in the exterior trunk release switch signal circuit. The exterior rear compartment lid release state is normally in an open state. Continuity between the exterior trunk release signal circuit and ground would indicate a short to ground in the circuit or an exterior rear compartment lid release switch that is continually closed.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Body Rear End Schematics Connector End View Reference: Body Rear End 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 |
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Important: To achieve service by pass mode, key ON engine OFF, a programmed key fob must be detected within the passenger compartment of the vehicle.
Does the scan tool display DTC B3618 as a current DTC? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | |
Is continuity found between the trunk release switch signal circuit and a good ground? | Go to Step 4 | Go to Step 5 | |
4 | Test the exterior trunk release switch 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 9 | Go to Step 6 |
5 | Inspect for poor connections at 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 9 | Go to Step 7 |
6 | Inspect for poor connections at the exterior trunk release switch. 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 9 | Go to Step 8 |
7 | Replace the RCDLR. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 9 | -- |
8 | Replace the exterior trunk release switch. Did you complete the replacement? | Go to Step 9 | -- |
9 |
Does the DTC reset? | Go to Step 2 | System OK |
