GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2000 🢒 Blazer - 4WD 🢒 Restraints 🢒 Seat Belts 🢒 Fasten Safety Belt Chime Inoperative

Step

Action

Value(s)

Yes

No

1

Was the BCM Diagnostic System Check performed?

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Go to Step 2

Go to Diagnostic System Check - Body Control System in Body Control System

2

Did you review the audible warnings system operation and perform the necessary inspections?

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Go to Step 3

Go to Audible Warnings Circuit Description

3

Verify that the fasten safety belt chime is inoperative.

Does the chime operate normally?

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Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 4

4
  1. Using the scan tool, enter BCM Data List INPUT 1. Monitor the SEAT BELT BUCKLED input.
  2. Unfasten the driver's seat belt.

Is NO displayed?

--

Go to Step 5

Go to Step 8

5

Inspect the connections at the BCM. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Are the connections in need of repair?

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Go to Step 6

Go to Step 7

6

Repair the connections at the BCM as necessary. Refer to Connector Repairs in Wiring Systems.

Is the repair complete?

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Go to Step 14

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7

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

Is the repair complete?

--

Go to Step 14

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8
  1. Backprobe the seat belt switch connector.
  2. Jumper terminal A to terminal B.

Is NO displayed for the SEAT BELT BUCKLED input?

--

Go to Step 9

Go to Step 10

9

Replace the seat belt switch. Refer to Front Seat Belt Buckle Replacement in Seat Belts.

Is the repair complete?

--

Go to Step 14

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10
  1. Disconnect the BCM connector C1.
  2. Using a test lamp, connect between connector C1 terminal A2 and terminal B11.
  3. Connect the seat belt switch connector.
  4. Unbuckle the driver's seat belt.

Does the test lamp light?

--

Go to Step 5

Go to Step 11

11
  1. Disconnect the BCM connector C1.
  2. Disconnect the seat belt switch connector.
  3. Using a test lamp, connect between connector C1 terminal A2 and the seat belt switch connector terminal B (harness side).

Does the test lamp light?

--

Go to Step 12

Go to Step 13

12

Locate and repair the open or high resistance in CKT 238 between the BCM connector C1 terminal B11 and seat belt switch connector terminal A. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 14

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13

Locate and repair the open or high resistance in CKT 1350 between the seat belt switch connector terminal B and G450. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 14

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14

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 4