Circuit 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 pulldown 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.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B1297 Trunk Unlatched Signal Circuit
Conditions for Running the DTC
| • | The battery voltage is between 9-16 volts. |
| • | DTC B1327 is not currently set. |
Conditions for Setting the DTC
| • | If the FTC module detects a short to battery in the rear compartment pulldown actuator circuit when the rear compartment lid is not ajar. |
| • | If the FTC module detects an open in the rear compartment pulldown actuator circuit for more than 5 seconds when the rear compartment lid is ajar. |
Action Taken When the DTC Sets
| • | Stores a current and history DTC B3641 in the FTC module. |
| • | The rear compartment lid pulldown feature and folding top operation shall be suspended until the fault is corrected. |
Conditions for Clearing the DTC
| • | This DTC will clear on the current status after the condition for setting the fault is corrected. |
| • | A history DTC will clear after 50 consecutive ignition cycles without a fault present. |
| • | History and current DTC can be cleared using the scan tool. |
Diagnostic Aids
| • | 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 function, will set a DTC B1297. Refer to Symptoms - Roof . |
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Folding Top Schematics Connector End View Reference: Power Roof Systems Connector End Views | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |
2 |
Is DTC B3641 set as a current DTC? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections |
3 |
Does the status display Deck Closed? | Go to Step 4 | Go to Step 5 |
4 |
Does the status display Deck Open? | Go to Diagnostic Aids | Go to Step 6 |
5 |
Is there continuity between terminals C and H of the rear compartment lid pull down actuator? | Go to Step 9 | Go to Step 6 |
6 | Test the rear compartment lid pulldown actuator signal circuit for a short to B+. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 12 | Go to Step 8 |
7 | Test the rear compartment lid pulldown actuator signal circuit for an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 12 | Go to Step 8 |
8 | Inspect for poor connections at the harness connector of the FTC module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 11 | Go to Step 10 |
9 | Inspect for poor connections at the harness connector of the rear compartment lid pulldown actuator. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 12 | Go to Step 10 |
10 | Replace the rear compartment lid pulldown actuator. Refer to Rear Compartment Lid Latch Replacement . Did you complete the replacement? | Go to Step 12 | -- |
11 | Replace the FTC module. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 12 | -- |
12 |
Does the DTC reset? | Go to Step 2 | -- |
