B3674

DTC B3674

Diagnostic Instructions

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

DTC Descriptors
DTC B3674 01
- Movable Roof Control Valve 1 Circuit short to battery

DTC B3674 02
- Movable Roof Control Valve 1 Circuit short to ground

DTC B3674 04
- Movable Roof Control Valve 1 Circuit open circuit

Diagnostic Fault Information






Circuit/System Description

The folding top uses electronically controlled valves to control the flow of hydraulic fluid. The folding top control (FTC) module controls Valve 1 (V1) by supplying voltage to the valve. The FTC Module also monitors the control circuit of V1 for proper operation.

Conditions for Running the DTC

The FTC module is active.

Conditions for Setting the DTC

B3674 01

A short to voltage on the control circuit of V1.

B3674 02

A short to ground on the control circuit of V1.

B3674 04

An open on the control circuit or low reference circuit of V1.

Action Taken When the DTC Sets

The top is disabled.

Conditions for Clearing the DTC

The fault is no longer present and the top completes one cycle.

Reference Information
Schematic Reference

Folding Top Schematics [1][2]Convertible Top
Connector End View Reference

Component Connector End Views Connector End Views By Name
Description and Operation

Power Folding Top Description and Operation Power Folding Top
Electrical Information Reference

* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Programming and Relearning for scan tool information

Circuit/System Testing

B3674 01

Test the control circuit of V1 for a short to voltage. If the circuit test is normal, replace the FTC module.

B3674 02

Test the control circuit of V1 for a short to ground. If the circuit test is normal, replace the FTC module.

B3674 04
1. Ignition OFF, disconnect the harness connector at V1.
2. Test for less than 5.0 ohm between the low reference circuit terminal 2 and ground.

• If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the FTC module.

3. Connect a test lamp between the control circuit terminal 1 and ground.
4. Ignition ON, command V1 on with a scan tool. The test lamp should illuminate.

• If the test lamp does not illuminate, test the control circuit for an open/high resistance. If the circuit tests normal, replace the FTC module.

5. If all circuits test normal, replace V1.

Repair Instructions

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

* Folding Top Pump with Motor Replacement (Motor) Service and RepairFolding Top Pump with Motor Replacement (Pump) Folding Top Pump with Motor Replacement (Pump)
* Folding Top Control Module Replacement Service and Repair