GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 1999 🢒 Grand Prix 🢒 Body and Accessories 🢒 Entertainment 🢒 Steering Wheel Controls Inoperative

Steering Wheel Controls Inoperative One or Both Switches

Step

Action

Value(s)

Yes

No

1
  1. Using a test light, backprobe between connector C205 terminal A to ground.
  2. Turn the ignition switch on.

Is the test light on?

--

Go to Step 3

Go to Step 2

2

Repair poor connection, open, or short to ground in circuit 843.

Is the repair complete?

--

Go to Steering Wheel Control System Check

--

3
  1. Disconnect C205.
  2. Connect a DMM between C205 (female side) terminal A and terminal C.
  3. Press each of the left and the right steering wheel control buttons, one at a time.
  4. Compare the approximate resistance values to the list below:
    5. • For the right side buttons:
       - Volume Up: 1270ohms
       - Volume Down: 1564ohms
       - Play: 1912ohms
       - Mute: 2387ohms
    • For the left side buttons:
       - Seek Up: 3102ohms
       - Seek Down: 4282ohms
       - AM/FM: 6652ohms
       - Preset: 13,632ohms

Do all of the resistance values approximately equal the values above?

--

Go to Step 7

Go to Step 4

4
  1. Remove the inflator module.
  2. Connect a DMM between the radio control switch pigtail harness connector terminal A and terminal C.
  3. Press each of the steering wheel control buttons, one at a time.
  4. Compare the approximate resistance values to the list below:
    5. • For the right side buttons:
       - Volume Up: 1270ohms
       - Volume Down: 1564ohms
       - Play: 1912ohms
       - Mute: 2387ohms
    • For the left side buttons:
       - Seek Up: 3102ohms
       - Seek Down: 4282ohms
       - AM/FM: 6652ohms
       - Preset: 13,632ohms

Do all the resistance values approximately equal those above?

--

Go to Step 6

Go to Step 5

5

Replace the left or the right radio control switch. Refer to Steering Wheel Control Switches Replacement .

Is the repair complete?

--

Go to Steering Wheel Control System Check

--

6

Replace the inflatable restraint steering wheel module coil. Refer to Inflatable Restraint Steering Wheel Module Coil Replacement in SIR.

Is the repair complete?

--

Go to Steering Wheel Control System Check

--

7
  1. Using a test light, probe between the radio harness connector C2 terminal 14 to ground.
  2. Turn the ignition switch on.

Is the test light on?

--

Go to Step 8

Go to Step 9

8

Repair short to B+ on circuit 1796.

Is the repair complete?

--

Go to Steering Wheel Control System Check

--

9

Using a DMM, measure the resistance between the radio harness connector C2 terminal 14 and ground.

Is the resistance measured same as the specified value?

∞

Go to Step 11

Go to Step 10

10

Repair short to ground in circuit 1796.

Is the repair complete?

--

Go to Steering Wheel Control System Check

--

11

Inspect for poor connection or open in circuit 1796.

Is there a poor connection or open in circuit 1796?

--

Go to Step 12

Go to Step 13

12

Repair poor connection or open in circuit 1796.

Is the repair complete?

--

Go to Steering Wheel Control System Check

--

13

Service the radio. Refer to Radio Replacement .

Is the repair complete?

--

Go to Steering Wheel Control System Check

--