For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 |

1. Reconnect all the previously disconnected components.
2. Cycle the ignition switch from the OFF to the RUN position.

Ensure that the engine remains OFF.

3. Connect a Scan Tool into the Diagnostic Link Connector (DLC).

Does the Scan Tool communicate with the body control module (BCM)?

--

Go to Step 3

Go to Step 2

2 | Refer to Data Link Connector (DLC) in Electrical Diagnosis. Are you able to establish communication? | -- | Go to Step 3 | --
3 |

1. Place the Scan Tool menu in Body Functions.
2. Using the Scan Tool , read the BCM DTC(s).

Are there any current diagnostic trouble codes?

--

Go to the applicable DTC table

Go to Step 4

4 |

1. Remove the Scan Tool from the DLC.
2. Cycle the ignition from the OFF to the RUN position.

Did all of the indicators turn ON then OFF?

--

Go to Step 6

Go to Step 5

5 |

1. Start the vehicle.
2. Do any of the indicator(s) stay ON or FLASH for an extended period of time?

--

Go to the Symptom Table

Go to Step 6

6 | Are there any history DTCs? | -- | Go to Step 7 | System OK
7 |

1. Refer to the appropriate DTC table for the history DTC.
2. Read the diagnostic aids, and the Condition For Setting the DTC.

Did the history DTC set as a current DTC?

--

Go to the applicable DTC table

System OK