For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Steering Wheel Control System Check? | -- | Go to Step 2 | Go to Steering Wheel Control System Check
2 | Do all of the radio functions operate correctly from the radio? | -- | Go to Step 3 | Go to Radio/Audio System Check
3 | Do all of the heater and A/C functions operate correctly from the heater and A/C control? | -- | Go to Step 4 | Go to Diagnostic System Check in HVAC
4 | Do one or more of the steering wheel control switches operate correctly? | -- | Go to Step 15 | Go to Step 5
5 | Caution: This vehicle is equipped with a Supplemental Inflatable Restraint (SIR) System. Failure to follow the correct procedure could cause the following conditions:

• | Air bag deployment

• | Personal injury

• | Unnecessary SIR system repairs

In order to avoid the above conditions, observe the following guidelines:

• | Refer to SIR Component Views in order to determine if you are performing service on or near the SIR components or the SIR wiring.

• | If you are performing service on or near the SIR components or the SIR wiring, disable the SIR system. Refer to Disabling the SIR System.

1. Disconnect the harness side connector of the inflatable restraint steering wheel module coil.
2. Measure the voltage from the inflatable restraint steering wheel module coil terminal A (harness side) to ground.

Does the voltage measure in the specified range?

10-15 V

Go to Step 9

Go to Step 6

6 | Inspect the 2A switch fuse in the steering column fuse block. Is the fuse open? | -- | Go to Step 7 | Go to Step 8
7 | Repair the short to ground in the inflatable restraint steering wheel module coil or the steering wheel control switch. Did you complete the repair? | -- | Go to Steering Wheel Control System Check | --
8 | Repair an open or a short to ground in CKT 43 (YEL). Did you complete the repair? | -- | Go to Steering Wheel Control System Check | --
9 |

1. Press and hold the steering wheel control VOL DOWN switch.
2. Measure the resistance from the inflatable restraint steering wheel module coil terminals A to C (steering column side).

Does the resistance measure in the specified range?

1408-1720 ohms

Go to Step 12

Go to Step 10

10 | Caution: This vehicle is equipped with a Supplemental Inflatable Restraint (SIR) System. Failure to follow the correct procedure could cause the following conditions:

• | Air bag deployment

• | Personal injury

• | Unnecessary SIR system repairs

In order to avoid the above conditions, observe the following guidelines:

• | Refer to SIR Component Views in order to determine if you are performing service on or near the SIR components or the SIR wiring.

• | If you are performing service on or near the SIR components or the SIR wiring, disable the SIR system. Refer to Disabling the SIR System.

1. Disconnect the steering wheel controls.
2. Press and hold the steering wheel control VOL DOWN switch.
3. Measure the resistance from the steering wheel controls connector terminals A to C.

Does the resistance measure in the specified range?

1408-1720 ohms

Go to Step 11

Go to Step 15

11 | Replace the Inflatable Restraint Steering Wheel Module Coil Replacement . Did you complete the repair? | -- | Go to Steering Wheel Control System Check | --
12 | Inspect CKT 1011 (LT GRN) for an open, a short to ground, or high resistence. Is CKT 1011 (LT GRN) OK? | -- | Go to Step 14 | Go to Step 13
13 | Repair CKT 1011 (LT GRN). Did you complete the repair? | -- | Go to Steering Wheel Control System Check | --
14 | Replace the radio. Refer to one of the following procedures:

• | Radio Replacement

• | Radio Replacement

• | Radio Replacement

Did you complete the repair?

--

Go to Steering Wheel Control System Check

--

15 | Replace the steering wheel controls. Did you complete the repair? | -- | Go to Steering Wheel Control System Check | --