For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Power Sunroof System Check ? | -- | bvGo to Step 2 | Go to Power Sunroof System Check
2 |

1. Turn the ignition switch to OFF.
2. Disconnect the sunroof control module connectors C1 and C2.
3. Turn the ignition switch to RUN.
4. Connect a J 39200 digital multimeter (DMM) between the sunroof control module connector C1 terminal C and ground.

Is the measured voltage within the specified range?

10-15V

Go to Step 4

Go to Step 3

3 | Repair the open in CKT 341 (BRN). Is the repair complete? | -- | Go to Step 28 | --
4 | Connect a DMM between the sunroof control module connector C1 terminals C and D. Is the measured voltage within the specified range? | 10-15V | Go to Step 6 | Go to Step 5
5 | Repair the open in CKT 1450 (BLK). Is the repair complete? | -- | Go to Step 28 | --
6 |

1. Disconnect the sunroof switch.
2. Using a DMM, measure the following voltages:

• | From battery positive voltage to sunroof control module connector C2 terminal 7.

• | From battery positive voltage to sunroof control module connector C2 terminal 6.

Is either measured voltage within the specified range?

10-15V

Go to Step 7

Go to Step 8

7 | Repair the short to ground in CKT 100 (BRN) or CKT 110 (ORN). Is the repair complete? | -- | Go to Step 28 | --
8 | Using a DMM, measure the following resistances:

• | Across sunroof control module connector C2 terminals 5 and 6.

• | Across sunroof control module connector C2 terminals 5 and 7.

Is either measured resistance less than the specified value?

Infinite (OL)

Go to Step 9

Go to Step 10

9 | Repair the short from CKT 110 (ORN) or CKT 100 (BRN) to CKT 128 (BLK). Is the repair complete? | -- | Go to Step 28 | --
10 |

1. Reconnect the sunroof switch.
2. Connect a DMM set to ohms scale across sunroof control module connector C2 terminals 5 and 6.
3. Press the sunroof switch to OPEN, then release the switch.

Is the measured resistance less than the specified value with the switch pressed and infinite (OL) with the switch released?

5ohms

Go to Step 11

Go to Step 12

11 |

1. Connect a DMM set to ohms scale across sunroof control module connector C2 terminals 5 and 7.
2. Press the sunroof switch to CLOSE, then release the switch.

Is the measured resistance less than the specified value with the switch pressed and infinite (OL) with the switch released?

5ohms

Go to Step 24

Go to Step 14

12 |

1. Disconnect the sunroof switch.
2. Connect a fused jumper across sunroof switch terminals D and E.
3. Using a DMM, measure the resistance across sunroof control module terminals 5 and 6.

Is the measured resistance less than the specified value with the jumper installed and infinite (OL) with the jumper removed?

5ohms

Go to Step 16

Go to Step 13

13 | Repair the open in CKT 100 (BRN) or CKT 128 (BLK). Is the repair complete? | -- | Go to Step 28 | --
14 |

1. Disconnect the sunroof switch.
2. Connect a fused jumper across sunroof switch terminals D and C.
3. Using a DMM, measure the resistance across sunroof control module terminals 5 and 7.

Is the measured resistance less than the specified value with the jumper installed and infinite (OL) with the jumper removed?

5ohms

Go to Step 16

Go to Step 15

15 | Repair the open in CKT 110 (ORN) or CKT 128 (BLK). Is the repair complete? | -- | Go to Step 28 | --
16 |

1. Inspect the sunroof switch connector for poor terminal contact.
2. If OK, replace the sunroof switch. Refer to Sunroof Switch Replacement .

Is the repair complete?

--

Go to Step 28

--

17 |

1. Open the sunroof using the following method:

1.1. | Partially lower the headliner.

1.2. | Locate the slot in the track transmission.

1.3. | Using a flat-bladed screwdriver, apply upward pressure to release the clutch and manually turn the transmission.

2. Using a DMM, measure the resistance between the sunroof control module connector C2 terminal 8 and ground.

Is the measured resistance less than the specified value?

Infinite (OL)

Go to Step 18

Go to Step 20

18 | Inspect CKT 132 (RED) for a short to ground. Is the circuit OK? | -- | Go to Step 27 | Go to Step 19
19 | Repair short to ground on CKT 132 (RED). Is the repair complete? | -- | Go to Step 28 | --
20 | Using a DMM, measure the resistance between the sunroof control module connector C2 terminal 8 and terminal 1. Is the measured resistance less than the specified value? | Infinite (OL) | Go to Step 23 | Go to Step 21
21 | Inspect for a short between CKT 132 (RED) and CKT 133 (YEL). Are the circuits OK? | -- | Go to Step 27 | Go to Step 22
22 | Repair the short between CKT 132 (RED) and CKT 133 (YEL). Is the repair complete? | -- | Go to Step 28 | --
23 |

1. Close the sunroof.
2. Connect a fused jumper between the sunroof control module connector C1 terminals C and B.
3. Connect a fused jumper between the sunroof control module connector C1 terminals A and D.

Does the sunroof motor operate?

--

Go to Step 24

Go to Step 25

24 |

1. Inspect the sunroof control module connector C1 for proper terminal contact.
2. If OK, replace the sunroof control module. Refer to Power Sunroof Express Module Replacement

--

Go to Step 28

--

25 | Inspect CKT 127 (GRN) and CKT 129 (LT GRN) for an open or a short to ground. Are the circuits OK? | -- | Go to Step 27 | Go to Step 26
26 | Repair the open or short to ground on CKT 127 (GRN) or CKT 129 (LT GRN). Is the repair complete? | -- | Go to Step 28 | --
27 |

1. Inspect the sunroof actuator terminals for poor terminal contact.
2. If OK, replace the sunroof actuator. Refer to Power Sunroof Motor Replacement .

Is the repair complete?

--

Go to Step 28

--

28 |

1. Make sure any components removed during diagnosis are installed in place and that all connectors are connected.
2. Repeat the system check. Refer to Power Sunroof System Check .

Is the system check complete?

--

System OK

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