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. Disconnect the BCM connector C2.
2. Turn the ignition switch to the ON position.

Is the Security Indicator Lamp ON?

--

Go to Step 3

Go to Step 4

3 |

1. Locate a short to ground in circuit XP840.
2. Repair the short to ground in circuit XP840.

Is the repair complete?

--

Go to Diagnostic System Check - Theft Deterrent .

--

4 |

1. Check all the power and ground circuits to the BCM.
2. If these circuits are OK, replace the BCM. Refer to Body Control Module.

Is the replacement complete?

--

Go to Diagnostic System Check - Theft Deterrent .

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