GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Audible Warnings Diagnostic System Check performed?

--

Go to Step 2

Go to Diagnostic System Check - Audible Warnings

2

  1. Place the Ignition Switch in the OFF or LOCK position.
  2. Remove the key from the Ignition Switch.
  3. Close the LF doors
  4. Remove the Audio Alarm Module from the Convenience Center.
  5. With a J 39200 test for continuity between Convenience Center Terminal J3 and ground.

Is there continuity to ground?

--

Go to Step 3

Go to Step 8

3

  1. Disconnect connector C266.
  2. Using a J 39200 , check for continuity between the IP Harness side of connector C266 cavity B3 and ground.

Is there continuity to ground?

--

Go to Step  4

Go to Step 5

4

Repair short to ground between connector C266 and the convenience center. Refer to Wiring Repairs in wiring.

Is the repair complete?

--

Go to Diagnostic System Check - Audible Warnings

--

5

With connector C266 disconnected, using a J 39200 , check for continuity between IP harness side of connector C266 cavity B4 and ground.

Is there continuity to ground?

--

Go to Step 6

Go to Step 7

6

Disconnect LF Door Jamb Switch and with a J 39200 , check for Short to ground between connector C266 cavity B4 and the LF jamb switch cavity C.

Is there continuity to ground?

--

Go to Step 9

Go to Step 10

7

Using a J 39200 DMM, inspect for continuity between Steering Column side of connector C266 cavity B3 and B4.

Is continuity present?

--

Go to Step 11

Go to Diagnostic System Check - Audible Warnings

8

Replace audio alarm module.

Is the repair complete?

--

Go to Diagnostic System Check - Audible Warnings

--

9

Repair short to ground in CKT 159 between connector C266 cavity B4 and LF Door Jamb Switch Cavity C. Refer to Wiring Repairs in wiring.

Is the repair complete?

--

Go to Diagnostic System Check - Audible Warnings

--

10

Replace the LF door jamb switch. Refer to Door Jamb Switch Replacement in Doors.

Is the repair complete?

--

Go to Diagnostic System Check - Audible Warnings

--

11

Replace the key-in warning buzzer switch. Refer to Ignition and Key Alarm Switch Assembly - Disassemble - Off Vehicle in Steering.

Is the repair complete?

--

Go to Diagnostic System Check - Audible Warnings

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