Diagnostic Instructions
| • | Perform the Diagnostic Starting Point - Roof prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
DTC Descriptors
DTC B3670: Pump Motor Temperature Sensor CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Folding Top Control Module Battery Voltage | 1 | 1 | -- | -- |
Folding Top Control Module Control | B1420 | B1420 | -- | -- |
Folding Top Control Module Ground | -- | 1, 2 | -- | -- |
Folding Top Control Switch Battery Voltage | 2 | 2 | -- | -- |
Folding Top Control Switch Close Signal | 2 | 2 | B3602 | -- |
Folding Top Control Switch Open Signal | 2 | 2 | B3602 | -- |
Front Panel Position Sensor 5-Volt Reference | B3665, B3666, B3971 | B3665 | B3665, B3666, B3670, B3971 | -- |
Front Panel Position Sensor Signal | B3665 | B3665 | B3665 | -- |
Front Panel Position Sensor Low Reference | -- | B3665 | -- | -- |
Folding Top Position Sensor 5-Volt Reference | B3665, B3666, B3971 | B3971 | B3665, B3666, B3670, B3971 | -- |
Folding Top Position Sensor Signal | B3971 | B3971 | B3971 | -- |
Folding Top Position Sensor Low Reference | -- | B3971 | -- | -- |
Rear Panel Position Sensor 5-Volt Reference | B3665, B3666, B3971 | B3666 | B3665, B3666, B3670, B3971 | -- |
Rear Panel Position Sensor Signal | B3666 | B3666 | B3666 | -- |
Rear Panel Position Sensor Low Reference | -- | B3666 | -- | -- |
Folding Top Pump Motor Temperature Sensor 5-Volt Reference | B3665, B3666, B3971 | 2, 7 | B3665, B3666, B3971, B3670 | -- |
Folding Top Pump Motor Temperature Sensor Signal | 2, 7 | 2, 7 | B3670 | -- |
Hard Top Connected Signal | B1420 | 4, 7 | B1310 | -- |
Folding Top Closed Switch Control | B1420 | 4, 7 | -- | -- |
Front Latched Position Switch Signal | B1420, 3, 4, 7 | 3, 4, 7 | B1300 | -- |
Front Latched Position Switch Control | B1420 | 3, 4, 7 | -- | -- |
Front Unlatched Position Switch Signal | B1420, 9 | 9 | B1300 | -- |
Front Unlatched Position Switch Control | B1420 | 9 | -- | -- |
Compartment Partition Position Switch Signal | B1420, 2, 7 | 2, 7 | 8 | -- |
Compartment Partition Position Switch Control | B1420 | 2, 7 | -- | -- |
Pump Direction A Control | B1011 | 2 | -- | -- |
Pump Direction B Control | B1011 | 2 | -- | -- |
Rear Compartment Lid Open Switch Signal | B1420, 3, 4 | 3, 4 | B3669 | -- |
Rear Compartment Lid Open Switch Control | B1420 | 3, 4 | -- | -- |
Folding Top Valve 1 Control | 1 | 3 | -- | -- |
Folding Top Valve 1 - Ground | -- | 3 | -- | -- |
Folding Top Valve 2 Control | 1 | 4 | -- | -- |
Folding Top Valve 2 - Ground | -- | 4 | -- | -- |
Folding Top Valve 3 Control | 1 | 3, 4, 6 | -- | -- |
Folding Top Valve 3 - Ground | -- | 3, 4, 6 | -- | -- |
Folding Top Valve 4 Control | 1 | B1297, 3, 4, 5 | -- | -- |
Folding Top Valve 4 - Ground | -- | B1297, 3, 4, 5 | -- | -- |
Folding Top Valve 5 Control | 1 | 2 | -- | -- |
Folding Top Valve 5 - Ground | -- | 2 | -- | -- |
1. No communication with the FTC module 2. Power folding top is inoperative 3. Power folding top does not open or complete the top opening procedure 4. Power folding top does not close or complete the top closing procedure 5. Rear Compartment lid will not open 6. Rear compartment lid will not close 7. DIC warning message displayed 8. Folding top will operate with the rear compartment partition removed 9. No effect on power folding top operation | ||||
Circuit/System Description
The temperature sensor that set this diagnostic trouble code (DTC) is part of the folding top pump/motor assembly. The folding top control (FTC) module supplies a 5-volt reference voltage and a signal circuit to the sensor. The module monitors the voltage of the sensor signal circuit once every 300 milliseconds to determine the temperature of the motor. The temperature sensor is a variable resistor, It's resistance changes as the temperature of the pump motor changes. When the FTC module detects that the temperature is above the maximum operating range, it will set this DTC.
Conditions for Running the DTC
| • | The battery voltage is between 9-16 volts. |
| • | The FTC module is in Accessory, RUN, or RAP. |
Conditions for Setting the DTC
The FTC module detects that the folding top pump motor temperature is greater than 95°C (203°F) or 242 counts.
Action Taken When the DTC Sets
| • | Stores a current and history DTC B3670 in the FTC module. |
| • | The FTC module will allow the top to be closed but not opened until the condition is cleared. |
| • | When the folding top switch is pressed, a class 2 message is sent to the driver information center (DIC), TOP MOTOR OVER TEMP. |
Conditions for Clearing the DTC
| • | This DTC will become history once the pump motor temperature is below 90°C (194°F). |
| • | A history DTC will clear after 50 consecutive ignition cycles without a fault present. |
Diagnostic Aids
| • | This DTC may set under normal operating conditions. Each time the folding top is moved to the open and closed positions it will cause the temperature of the pump motor to increase. Therefore, numerous cycles of the power folding top may raise the temperature to the point for which this DTC will set. Because this DTC can set under normal operating conditions, the following conditions must also be considered when diagnosing this DTC: |
| - | High ambient temperature--A high ambient temperature will limit the number of times the system will operate. |
| - | Low ambient temperature--A low ambient temperature will limit the number of times the system will operate. |
| • | This DTC may set in low temperature conditions that is below the recommended temperature for folding top operation. |
| • | The following conditions may cause an intermittent malfunction: |
| - | An intermittent sticking or binding linkage condition can cause excessive current draw resulting in a temperature out of range. |
| - | The folding top pump motor or thermistor is shorted internally. |
| • | The Rear Compartment Lid is also referenced as the Deck Lid for this vehicle. |
Reference Information
Schematic Reference
Connector End View Reference
Power Roof Systems Connector End Views
Description and Operation
Power Folding Top Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Ignition ON, observe the scan tool Pump Motor Temp. Sensor parameter. The reading should be less than 242 counts.
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the folding top pump motor temperature sensor.
- Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal 2 and ground.
- Verify the scan tool Pump Motor Temp. Sensor parameter is less than 38 counts.
- Install a 3A fused jumper wire between the signal circuit terminal 1 and the 5-volt reference circuit terminal 2. Verify the scan tool Pump Motor Sensor parameter is greater than 242 counts.
- If all circuits test normal, replace the folding top pump and valve assembly.
| ⇒ | If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the FTC module. |
| ⇒ | If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the FTC module. |
| ⇒ | If greater than the specified range, test the signal circuit terminal 1 for a short to voltage. If the circuit tests normal, replace the FTC module. |
| ⇒ | If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the FTC module. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for FTC module replacement, setup, and programming |
