Tech 2 Tool Update - ABS Module Inspection
Service ProcedureTech 2 Tool Update
Ensure that your Tech 2 is updated with software version 32.005 or higher. You can obtain this in the Software Download section of TIS2Web.
ABS Module Inspection
1. Park the vehicle on a flat, level surface.
2. Apply the parking brake.
3. Connect scan tool.
4. Select "F1: ABS Check" in Special Functions.
5. Start ABS valve check.
6. The Waiting for Data screen will appear.
While this screen is displayed, the pump motor is running (1 sec)
7. The "Procedure in Progress" message will appear on the ABS Check screen.
When the Tech 2 screen is prompted to "Apply and Hold the Brake Pedal," the technician should apply and hold heavy brake force during ABS Check
With the valve open, the pedal will drop for 2 seconds. With the motor pumping, the pedal will push back for 3 seconds.
Note
The Tech 2 test sequence is left front, right front, left rear and right rear during steps 8 through 23.
- If the ABS/ESC module test passes all 4 procedures (4 pedal drops and 4 push backs are "YES"), replace the brake fluid with Delco Supreme 11 Brake Fluid (P/N 19299818 USA, P/N 19299819 Canada). Flush the brake system. Refer to Brake Valve Cycling in this bulletin and proceed to Brake Valve Cycling on the Tech 2.
- If any of the answers are "NO", replace the ABS/ESC HCU and brake fluid with Delco Supreme 11 Brake Fluid (P/N 19299818 USA, P/N 19299819 Canada). Refer to Chevrolet Optra Brake Pressure Modulator Replacement or Chevrolet Aveo, Pontiac G3 and Pontiac Wave Brake Pressure Modulator Replacement in this bulletin.
8. Apply and hold brake pedal.
9. Answer the question on the ABS Check screen.
- If the answer is yes, proceed to the next step.
- If the answer is no, proceed to Chevrolet Optra Brake Modulator Replacement or Chevrolet Aveo, Pontiac G3 and Pontiac Wave Brake Modulator Replacement in this bulletin.
10. Answer the question on the ABS Check screen.
- If the answer is yes, proceed to the next step.
- If the answer is no, proceed to Chevrolet Optra Brake Modulator Replacement or Chevrolet Aveo, Pontiac G3 and Pontiac Wave Brake Modulator Replacement in this bulletin.
11. The ABS Check screen will instruct you to release the brake pedal.
While this screen is displayed, the pump motor is running (1 sec)
12. The "Procedure in Progress" message will appear on the ABS Check screen.
When the Tech 2 screen is prompted to "Apply and Hold the Brake Pedal," the technician should apply and hold heavy brake force during ABS Check
With the valve open, the pedal will drop for 2 seconds. With the motor pumping, the pedal will push back for 3 seconds.
13. Apply and hold brake pedal.
14. Answer the question on the ABS Check screen.
- If the answer is yes, proceed to the next step.
- If the answer is no, proceed to Chevrolet Optra Brake Modulator Replacement or Chevrolet Aveo, Pontiac G3 and Pontiac Wave Brake Modulator Replacement in this bulletin.
15. Answer the question on the ABS Check screen.
- If the answer is yes, proceed to the next step.
- If the answer is no, proceed to Chevrolet Optra Brake Modulator Replacement or Chevrolet Aveo, Pontiac G3 and Pontiac Wave Brake Modulator Replacement in this bulletin.
16. The ABS Check screen will instruct you to release the brake pedal.
While this screen is displayed, the pump motor is running (1 sec)
17. The "Procedure in Progress" message will appear on the ABS Check screen.
When the Tech 2 screen is prompted to "Apply and Hold the Brake Pedal," the technician should apply and hold heavy brake force during ABS Check
With the valve open, the pedal will drop for 2 seconds. With the motor pumping, the pedal will push back for 3 seconds.
18. Apply and hold brake pedal.
19. Answer the question on the ABS Check screen.
- If the answer is yes, proceed to the next step.
- If the answer is no, proceed to Chevrolet Optra Brake Modulator Replacement or Chevrolet Aveo, Pontiac G3 and Pontiac Wave Brake Modulator Replacement in this bulletin.
20. Answer the question on the ABS Check screen.
- If the answer is yes, proceed to the next step.
- If the answer is no, proceed to Chevrolet Optra Brake Modulator Replacement or Chevrolet Aveo, Pontiac G3 and Pontiac Wave Brake Modulator Replacement in this bulletin.
21. The ABS Check screen will instruct you to release the brake pedal.
While this screen is displayed, the pump motor is running (1 sec)
22. The "Procedure in Progress" message will appear on the ABS Check screen.
When the Tech 2 screen is prompted to "Apply and Hold the Brake Pedal," the technician should apply and hold heavy brake force during ABS Check.
With the valve open, the pedal will drop for 2 seconds. With the motor pumping, the pedal will push back for 3 seconds.
23. Apply and hold brake pedal.
24. Answer the question on the ABS Check screen.
- If the answer is yes, proceed to the next step.
- If the answer is no, proceed to Chevrolet Optra Brake Modulator Replacement or Chevrolet Aveo, Pontiac G3 and Pontiac Wave Brake Modulator Replacement in this bulletin.
25. Answer the question on the ABS Check screen.
- If the answer is yes, proceed to the next step.
- If the answer is no, proceed to Chevrolet Optra Brake Modulator Replacement or Chevrolet Aveo, Pontiac G3 and Pontiac Wave Brake Modulator Replacement in this bulletin.
26. The ABS Check screen will instruct you to release the brake pedal.
27. The "Procedure Passed "message will appear on the ABS Check screen.