GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2002 🢒 Venture Ext. 🢒 Restraints 🢒 Seat Belts 🢒 Diagnostic System Check - Seat Belts

Test Description

The numbers below refer to the step numbers on the diagnostic table:

  1. This step tests to see if the scan tool powers up.

    2.

  2. This step tests to see if the scan tool can communicate with the body control module (BCM).

    3.

  3. This step tests to see if there are any current or history diagnostic trouble codes (DTCs) present.

    4.

  4. This step tests to see if there are any communication DTCs, or U-codes, present.

    5.

  5. This step tests to see if an ECU Malfunction, DTC B1000, is present.

Step

Action

Yes

No

1

Install a scan tool.

Does the scan tool power up?

Go to Step 2

Go to Scan Tool Does Not Power Up in Data Link Communications

2

Attempt to establish communications with the body control module (BCM).

Does the scan tool communicate with the BCM?

Go to Step 3

Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications

3

  1. With a scan tool, observe the BCM diagnostic trouble code (DTC) display.
  2. Record the displayed DTCs on the repair order, specifying as current or history.

Does the scan tool display any current or history DTCs?

Go to Step 4

System OK

4

Does the scan tool display any DTCs which begin with a "U"?

Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications

Go to Step 5

5

Does the scan tool display DTC B1000?

Go to DTC B1000 in Body Control System

Go to Diagnostic Trouble Code (DTC) List