For 1990-2009 cars

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

1. Perform the following steps in order to enter the body control module (MALL) diagnostic mode:

1.1. | Press and hold the power door unlock switch.

1.2. | Cycle the headlamps ON and OFF 6 times.

1.3. | Release the power door unlock switch.

2. The MALL module may sound a series of tones (history codes) upon entering the diagnostic mode. Refer to Body Control Module Diagnostic Information in Body Control System.
3. Press a door lock switch to the UNLOCK position.

Does the MALL module sound 1 tone each time the switch is pressed?

--

Go to Step 3

Go to Step 5

3 |

1. Turn the ignition switch to the OFF position.
2. Disconnect the MALL module connector C2.
3. Use a J 39200 digital multimeter (DMM) in order to measure the resistance between the MALL connector C2 terminal C6 and ground while pressing the door lock switch to the UNLOCK position.

Is the resistance within the specified range?

0-5 ohms

Go to Step 7

Go to Step 6

4 |

1. Place the ignition switch in the OFF position.
2. Disconnect the MALL connector C1.
3. Disconnect the left front door lock actuator connector C2.
4. Use the DMM inorder to measure the resistance between connector C1 terminal A and connector C2 terminal A.

Is the resistance within the specified range?

0-5 ohms

Go to Step 7

Go to Step 5

5 | Repair a short to ground in CKT 694 (TAN). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Power Door Locks System Check | --
6 | Repair the open in CKT 781 (ORN/BLK). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Power Door Locks System Check | --
7 | Replace the MALL module. Refer to Body Control Module Replacement in Body Control System. Did you complete the repair? | -- | Go to Power Door Locks System Check | --