For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you review the operation and perform the necessary inspections? | -- | Go to Step 2 | Go to Symptoms
2 | Turn ON the ignition, with the engine OFF. Is the LOW OIL PRESSURE message on? | -- | Go to LOW OIL PRESSURE Message Always On in Instrument Panel, Gauges and Console | Go to Step 3
3 | Is the LOW FUEL message on? | -- | Go to Fuel Gage Inaccurate or Inoperative in Instrument Panel, Gauges and Console | Go to Step 4
4 | Is the fasten safety belt indicator on? | -- | Go to Fasten Safety Belt Indicator/Chime Always On in Seat Belts | Go to Step 5
5 | Is the left or right turn signal indicator on? | -- | Go to Turn Signal Indicator Always On - Left Side or Turn Signal Indicator Always On - Right Side in Lighting Systems | Go to Step 6
6 | Make sure all of the doors are closed. Is the DOOR AJAR message on? | -- | Go to DOOR AJAR Message Always On in Doors | Go to Step 7
7 | Test the control circuit of the IP BCM chime request for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 8
8 | Inspect for poor connections at the harness connector of the headlamp and IP lamp dimmer switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 9
9 | Inspect for poor connections at the harness connector of the BCM connector C2. Refer Testing for Intermittent Conditions and Poor Connections to and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 10
10 |

1. Turn OFF the ignition.
2. Make sure the headlamp and IP lamp dimmer switch is in the off position.
3. Disconnect the BCM connector C2.
4. Test the control circuit of the headlamp and IP lamp dimmer switch for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 18

Go to Step 11

11 | Important: Refer to Caution: When you are performing service on or near the SIR components or the SIR wiring, you must disable the SIR system. Refer to Disabling the SIR System. Failure to follow the correct procedure could cause air bag deployment, personal injury, or unnecessary SIR system repairs. before working in the steering column.

Connect a test lamp between the control circuit of the ignition key alarm switch and ground. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 12

Go to Step 13

12 |

1. Take the ignition key out of the ignition switch.
2. Connect a test lamp between the control circuit of the ignition key alarm switch and B+. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 14

Go to Step 15

13 | Replace the headlamp and IP lamp dimmer switch. Refer to Headlamp Switch Replacement in Lighting Systems. Is the repair complete? | -- | Go to Step 18 | --
14 |

1. Disconnect C201.
2. Leave the test lamp at the same location.

Does the test lamp illuminate?

--

Go to Step 16

Go to Step 17

15 | Replace the BCM. Refer to Body Control Module Replacement in Body Control Systems. Is the repair complete? | -- | Go to Step 18 | --
16 | Repair a short to ground in the control circuit of the ignition key alarm switch. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 18 | --
17 | Replace the ignition key alarm switch. Refer to Ignition and Key Alarm Switch Assembly - Disassemble - Off Vehicle and Ignition and Key Alarm Switch Assembly - Assemble - Off Vehicle in Steering Wheel and Column - Tilt. Is the repair complete? | -- | Go to Step 18 | --
18 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2