For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Was the Content Theft Deterrent System Check performed? | -- | Go to Step 2 | Go to Diagnostic System Check - Theft Deterrent .
2 |

1. Install the scan tool.
2. Select BODY CONTROL MODULE.
3. Select INPUTS.
4. Select KEY DISARM.
5. Insert the ignition key into the door lock switch.
6. Turn the door lock switch to unlock.

Does the scan tool display ON?

--

Go to Step 3

Go to Step 4

3 |

1. Check the door lock switch for intermittent malfunction, by turning the switch several times while monitoring the scan tool.
2. If OK, check circuits XY8, F4, F8, and F1 for intermittent operation.

Was a problem found with the above circuits

--

Go to Step 5

Go to Step 6

4 |

1. Disconnect connector C1 from the Body Control Module (BCM).
2. Using the DMM on the ohms scale, connect the DMM from terminal A03 to a good ground.
3. Insert the ignition key in the door lock switch and turn to the unlock position.
4. Measure the resistance.

Is the measured resistance within the specified value?

Less than 5 ohms

Go to Step 6

Go to Step 7

5 | Repair the intermittent circuit malfunction or replace the door lock switch. Refer to Doors. Is the repair or replacement complete? | -- | Go to Diagnostic System Check - Theft Deterrent . | --
6 |

1. Check for poor connections at the BCM.
2. Replace the BCM. Refer to Body Control Module.

Is the replacement complete?

--

Go to Diagnostic System Check - Theft Deterrent .

--

7 |

1. Remove the connector from the door lock switch.
2. Install the scan tool.
3. Select KEY DISARM.
4. Using a fused jumper wire, connect the jumper wire between terminals 1 and 2.

Does the scan tool display ON?

--

Go to Step 8

Go to Step 9

8 | Replace the door lock switch. Refer to Doors. Is the replacement complete? | -- | Go to Diagnostic System Check - Theft Deterrent . | --
9 | Remove the jumper wire end from terminal 1 and connect it to a known good ground. Does the scan tool display ON? | -- | Go to Step 10 | Go to Step 11
10 |

1. Locate an open or a high resistance in the ground circuit.
2. Repait the open or the high resistance in the ground circuit.

Is repair complete?

--

Go to Diagnostic System Check - Theft Deterrent .

--

11 |

1. Locate an open or a high resistance in circuit XY810.
2. Repair the open or the high resistance in circuit XY810.

Is the repair complete?

--

Go to Diagnostic System Check - Theft Deterrent .

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