GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

  1. Using a test light, backprobe between connector C205 terminal G 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 or open in circuit 43.

Is the repair complete?

--

Go to Steering Wheel Control System Check

--

3

  1. Disconnect C205.
  2. Connect a DMM between C205 (female side) terminal G and terminal H.
  3. Press each of the LH steering wheel control buttons one at a time.
  4. Compare the approximate resistance values to the list below:
  5. • Volume Up: 1270ohms
    • Volume Down: 1564ohms
    • Seek Up: 3102ohms
    • Prog: 13,632ohms

Do all the resistance values approximately equal those above?

--

Go to Step 7

Go to Step 4

4

  1. Disconnect the LH radio control switch.
  2. Connect a DMM between the LH radio control switch pigtail harness connector terminal G and terminal H.
  3. Press each of the LH steering wheel control buttons, one at a time.
  4. Compare the approximate resistance values to the list below:
  5. • Volume Up: 1270ohms
    • Volume Down: 1564ohms
    • Seek Up: 3102ohms
    • Prog: 13,632ohms

Do all the resistance values approximately equal those above?

--

Go to Step 6

Go to Step 5

5

Replace the LH radio control switch. Refer to Steering Wheel Control Switches Replacement for service procedure.

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 - Off Vehicle in SIR for service procedure.

Is the repair complete?

--

Go to Steering Wheel Control System Check

--

7

  1. Using a test light, backprobe between the radio harness connector terminal E6 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 terminal E6 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

Check 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 for service procedure.

Is the repair complete?

--

Go to Steering Wheel Control System Check

--