GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2001 🢒 Catera 🢒 Body and Accessories 🢒 Roof 🢒 DTC 050, 051, or 055

Circuit Description

Internal defects in the sunroof actuator will set DTC 50, 51 or 55.

Conditions for Setting the DTC

Sunroof actuator hardware failure (EEPROM, RAM or ROM are defective).

Action Taken When the DTC Sets

DTC 50, 51 or 55 will set and the sunroof actuator will become disabled.

Conditions for Clearing the DTC
    • DTC 50, 51 or 55 will clear when the fault is no longer present.
    • DTC 50, 51 or 55 can be cleared by using the scan tool.

Diagnostic Aids

Replace the sunroof actuator.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. This step replaces the sunroof actuator.

    2.

  2. This step programs the sunroof actuator and also checks for any DTCs that may be present.

DTC 050, 051, or 055

Step

Action

Value(s)

Yes

No

1

Did you perform the Power Sunroof Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check - Power Sunroof

2
  1. Install the scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. Select Power Roof and display the DTCs.

Does the scan tool display DTC 55?

--

Go to Step 3

Go to Step 4

3

Replace the sunroof actuator. Refer to Power Sunroof Motor Replacement .

Is the replacement complete?

--

Go to Step 4

--

4
  1. Perform the setup procedure. Refer to Sunroof Motor Synchronization .
  2. Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 3