GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Epica 🢒 Body 🢒 Wipers/Washer Systems 🢒 Diagnostic System Check - Wiper/Washer

Test Description

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

  1. Lack of communication may be due to a partial malfunction of the serial data circuit or due to a total malfunction of the serial data circuit. The specified procedure will determine the particular condition.

Step

Action

Yes

No

Schematic Reference: Wiper/Washer Schematics

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
  1. Turn ON the ignition, with the engine OFF.
  2. Attempt to establish communication with the ISU.

Does the scan tool communicate with the ISU?

Go to Step 3

Go to Scan Tool Does Not Communicate with Component in Data Link Communications

3

Select the ISU display DTC function on the scan tool.

Does the scan tool display any DTCs?

Go to Diagnostic Trouble Code (DTC) List

Go to Symptoms - Wiper/Washer Systems