GM Service Manual Online
For 1990-2009 cars only

Object Number: 65582  Size: LF
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Engine Controls Components
Data Link Connector
OBD II Symbol Description Notice

Circuit Description

This diagnostic determines if the ABS system is capable of detecting a rough road situation. This DTC is a type D DTC.

Conditions for Setting the DTC

    • The vehicle speed is at least 1 mph.
    • The engine speed is no more than 5800 RPM.
    • The engine load is no more than 89.9%.
    • The DTC P0300 is set, and the DTC P0300 is requesting the MIL ON.

Action Taken When the DTC Sets

The Malfunction Indicator Lamp (MIL) will not illuminate. The VCM stores a history DTC.

Test Description

The number below refer to the step number on the diagnostic table.

  1. This step isolates an open serial data circuit from the EBCM system.

Step

Action

Value(s)

Yes

No

1

Important: Before clearing the DTCs, use the scan tool in order to record the Freeze Frame and the Failure Records for reference. This data will be lost when the Clear Info function is used.

Was the Powertrain On-Board Diagnostic (OBD) System Check performed?

--

Go to Step 2

Go to Powertrain On Board Diagnostic (OBD) System Check

2

  1. Disconnect the VCM and the EBCM.
  2. Check the serial data circuit between the VCM and the EBCM for an open.

Was a problem found?

--

Go to Step 3

Go to Section 5E1 Antilock Brake System (ABS)

3

Repair the problem as necessary.

Is the action complete?

--

Go to Step 4

--

4

  1. Use the scan tool in order to select the DTC and the Clear Info.
  2. Start the engine.
  3. Allow the engine to idle until the normal operating temperature is reached.
  4. Select the DTC and the Specific.
  5. Enter the DTC number which was set.
  6. Operate the vehicle within the conditions for setting this DTC as specified in the supporting text.

Does the scan tool indicate that this diagnostic Ran and Passed?

--

Go to Step 5

--

5

Use the scan tool in order to displaythe Capture Info and the Review Info.

Are there any DTCs displayed that have not been diagnosed?

--

Go to the applicable DTC table

System OK