B1297

DTC B1297

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.



DTC Descriptor
DTC B1297
- Trunk Unlatched Signal Circuit




Diagnostic Fault Information






Circuit/System Description

The folding top control (FTC) module checks the integrity of the signal circuit from the rear compartment lid pulldown actuator at least once every 300 milliseconds. The rear compartment lid pulldown actuator has a constant battery positive voltage supplied. During truck or folding top operation, the rear compartment lid pull down actuator will apply the battery positive voltage to the FTC module. The FTC uses this signal as assurance that the latch is clear of the striker.


Conditions for Running the DTC

* Battery voltage must be between 9-16 volts.
* DTC B1327 is not set as current.



Conditions for Setting the DTC

* The FTC module detects a short to voltage in the rear compartment lid pulldown actuator circuit when the rear compartment lid is not ajar.
* The FTC module detects an open or high resistance in the rear compartment lid pulldown actuator circuit for more than 5 seconds when the rear compartment lid is ajar.



Actions Taken When the DTC Sets

* FTC module stores DTC B1297 to memory.
* The rear compartment lid pulldown feature and folding top operation shall be suspended until the fault is corrected.



Conditions for Clearing the DTC

* The condition responsible for setting the DTC no longer exists.
* You issue a scan tool CLEAR DTCs command.
* A history DTC will clear once 50 consecutive malfunction-free ignition cycles have occurred.



Diagnostic Aids

The following conditions may cause an intermittent malfunction:

* Manual operation of the rear compartment lid may cause DTC B1297 to set.
* A fault which allows the rear compartment lid to release, but does not allow normal folding top operation will set DTC B1297.



Reference Information
Schematic Reference

* Release Systems Schematics (Release Systems Schematics)
* Folding Top Schematics ([1][2]Convertible Top)

Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

* Power Door Latch Description and Operation (Description and Operation)
* Power Folding Top Description and Operation (Power Folding Top Description and Operation)

Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning)


Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the rear compartment lid pull down actuator.
2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal H and ground.

• If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the B+ circuit fuse is open, test the signal circuit terminal C for a short to ground.

3. Ignition ON, verify the scan tool Deck Lid Latch Switch parameter is deck closed.

• If not the specified value, test the signal circuit terminal C for a short to voltage. If the circuit tests normal, replace the FTC module.

4. Install a 3A fused jumper wire between the signal circuit terminal C and the B+ circuit terminal H. Verify the scan tool deck lid latch switch parameter is deck open.

• If not the specified value, test the signal circuit terminal C for an open/high resistance. If the circuit tests normal, replace the FTC module.

5. If all circuits test normal, test or replace the rear compartment lid pulldown actuator.



Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Rear Compartment Lid Latch Replacement (Service and Repair)
* Control Module References (Programming and Relearning) for FTC module replacement, setup, and programming