GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 SSR 🢒 DTC 🢒 DTC B3670

Circuit Description

The roof door module (RDM) monitors the temperature of the folding top pump motor at least once every 2 milliseconds. The RDM monitors the sensor low reference voltage from the folding top pump motor thermistor. As the folding top pump motor warms up, the thermistors resistance will decrease. When the RDM detects that the temperature is outside the valid ranges, a DTC is set.

Conditions for Running the DTC
    • The battery voltage is between 9.0-16.0 volts.
    • The RDM is in Accessory, RUN, or RAP.

Conditions for Setting the DTC

The RDM detects that the folding top pump motor temperature is out of range, above 100°C or below -50°C (212°F or below -50°F).

Action Taken When the DTC Sets
    • Stores a current and history DTC B3670 in the RDM.
    • The folding top operation is suspended.

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

The following conditions may cause an intermittent malfunction:

    • There is an intermittent sticking or binding condition that can cause excessive current draw resulting in a temperature out of range.
    • The folding top motor is shorted internally.

If the DTC does not reset after the code is cleared, then the switch may be the source of the intermittent fault. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Step

Action

Values

Yes

No

Schematic Reference: Folding Top Schematics

Connector End View Reference: Power and Grounding Connector End Views in Wiring Systems

1

Did you perform the Power Roof Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Power Roof

2
  1. Turn OFF the ignition.
  2. Disconnect the pump motor harness connector.
  3. Measure the resistance across the pump motor thermistor.

Does the resistance measure more than the specified value?

30 K ohms

Go to Step 3

Go to Step 4

3
  1. Connect the pump motor harness connector.
  2. Turn ON the ignition, with the engine OFF.
  3. Test the sensor low reference circuit of the folding top pump motor thermistor for a short to ground, an open, or a short to voltage. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 5

Go to Diagnostic Aids

4

Important: Always perform the reinitialization of the power windows procedure for the RDM.

  1. Replace the folding top pump motor assembly. Refer to Folding Top Pump with Motor Replacement .
  2. Perform the reinitialization of the power windows procedure for the RDM. Refer to Power Window Reinitialization in Doors.

Did you complete the replacement?

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Go to Step 5

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5
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC.

Does the DTC reset?

--

Go to Step 2

System OK