B3674

DTC B3674

DIAGNOSTIC INSTRUCTIONS
- Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
- Review Strategy Based Diagnosis for an overview of the diagnostic approach.
- 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

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.

CIRCUIT/SYSTEM TESTING

B3674 01
Test the control circuit of V1 for a short to voltage. If circuit OK, replace FTC Module.

B3674 02
Test the control circuit of V1 for a short to ground. If circuit OK, replace FTC Module.

B3674 04
1. Disconnect V1.
2. Probe the control circuit of V1 with a test lamp connected to ground.
3. 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 or high resistance.
- If circuit OK, replace FTC Module.
4. Probe the low reference circuit with a test lamp connected to B+. The test lamp should illuminate.
- If the test lamp does not illuminate, test the low reference circuit for an open or high resistance.If circuit OK, replace FTC Module.
5. If circuits tests OK, replace V1.

COMPONENT TESTING

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

- Folding Top Pump with Motor Replacement (Pump) Folding Top Pump with Motor Replacement (Motor)
- Folding Top Control Module Replacement