GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Audible Warnings System Check?

--

Go to Step 2

Go to Audible Warnings System Check

2

  1. Verify that the left front safety belt is unbuckled.
  2. Turn the ignition switch to the ON position.
  3. Both of the following events should occur:
  4. • The FASTEN BELTS indicator is illuminated for approximately 70 seconds.
    • The chime sounds for approximately 6 seconds.

Did both of the events occur?

--

Go to Step 4

Go to Step 3

3

  1. Leave the left front safety belt unbuckled.
  2. Leave the ignition switch in the ON position.

Does only the chime sound?

--

Go to Audible Warnings System Check

Go to Step 5

4

  1. Turn the ignition switch to the OFF position.
  2. Buckle the left front safety belt.
  3. Turn the ignition to the ON position.
  4. Both of the following events should occur:
  5. • The FASTEN BELTS indicator illuminates.
    • The chime sounds.

Did both of the events occur?

--

Go to Step 7

Go to Audible Warnings System Check

5

  1. Leave the left front safety belt unbuckled.
  2. Leave the ignition switch in the ON position.

Does only the FASTEN BELTS indicator illuminate?

--

Go to Step 6

Go to Step 7

6

Inspect the body control module (MALL) connector C2 for proper contact.

Is the MALL connector contact OK?

--

Go to Step 8

Go to Step 12

7

  1. Disconnect the MALL connector C2.
  2. Measure the resistance between the MALL connector C2 terminal D1 (harness side) and ground.

Is the resistance less than the specified value?

5 ohms

Go to Step 8

Go to Step 9

8

Replace the MALL. Refer to Body Control Module Replacement in Body Control System.

Did you complete the repair?

--

Go to Audible Warnings System Check

--

9

Inspect CKT 238 (BLK/WHT) for an open or a short to ground.

Is there an open or a short to ground in CKT 238?

--

Go to Step 13

Go to Step 10

10

Inspect connector C301 for proper terminal contact.

Is connector C301 OK?

--

Go to Step 11

Go to Step 12

11

    • Verify that terminal A and terminal B of the safety belt switch maintain continuity with the safety belt unbuckled.
    • Verify that terminal A and terminal B have no continuity with the safety belt buckled.

Is the safety belt switch OK?

--

Go to Audible Warnings System Check

--

12

Repair the faulty connector. Refer to Wiring Systems.

Did you complete the repair?

--

Go to Audible Warnings System Check

--

13

Repair the open to the faulty CKT. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Audible Warnings System Check

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