Chevrolet Captiva Service & Repair Manual: Antilock Brake System Diagnosis & Testing
| 1. |
Verify that following areas function
as designed: |
| |
a. |
Battery is fully charged and cables
are clean and tight. |
| |
c. |
Ground circuits for area of customer
concern are clean, tight, and in correct location. |
| |
d. |
All connections/connectors for area
of concern are fully seated. |
| |
e. |
There are no aftermarket devices that
affect operation of system. |
| |
f. |
A suitably programmed scan tool powers
up. |
| 2. |
Understand and validate customer concern.
Inspect visible system components for obvious damage or conditions
that may cause concern. |
| 3. |
Verify symptom is not exclusively a
mechanical concern. If symptom is exclusively a mechanical concern,
diagnose and repair as required. |
| 4. |
Verify vehicle powers up with ignition
"ON". If vehicle does not power up, diagnose and repair as required. |
| 5. |
Perform vehicle DTC Information function
using a suitably programmed scan tool. Verify at least one control
module communicates with scan tool. Record any control module that
is not communicating, any DTC, including symptom byte, and control
module that has set DTC. |
| 6. |
Verify there are no current control
module Internal Hardware Performance DTCs set. If any DTC of this
type is set, diagnose and repair as required. |
| 7. |
Verify vehicle is built with any control
module listed as not communicating. |
| 8. |
Verify there are no current control
module Power Mode or Communication DTCs set If any DTC of this type
is set, diagnose and repair as required. |
| 9. |
With driver door open, observe scan
tool Power Mode parameter while cycling ignition switch through
all power modes. Verify current Power Mode parameter matches actual
ignition switch positions. |
| 10. |
Verify that engine cranks and runs. |
| 11. |
Verify there are no other DTCs set.
If other DTCs are set, diagnose them in order as follows: |
| |
b. |
Programming, Setup, Configuration or
Software Performance DTCs. |
| |
c. |
Component related DTCs. |
| 12. |
Verify customer concern is not related
to inspection/maintenance testing if inspection and maintenance
testing has been performed. |
| 13. |
Diagnose any remaining customer concern. |
|
Diagnosing and testing the Antilock Brake System (ABS) in a Chevrolet Captiva involves several steps to ensure the system's proper functioning. First, you'll need to connect a diagnostic scan tool to the vehicle's onboard diagnostic (OBD) port. This tool allows you to access the ABS module and retrieve trouble codes that can indicate specific issues with the system.
Once you've retrieved the trouble codes, you can perform further testing based on the codes received. For example, if the scan tool indicates a fault with a wheel speed sensor, you can use a multimeter to test the sensor's resistance and voltage output. This helps determine if the sensor is functioning within specifications.
Additionally, you'll want to inspect the ABS system's wiring harness and connectors for any signs of damage or corrosion. Poor connections can lead to ABS malfunctions and false trouble codes. Thoroughly inspecting these components can help identify and resolve potential issues.
After conducting diagnostic tests and addressing any identified problems, it's crucial to perform a road test to verify the ABS system's proper operation. During the road test, pay attention to how the brakes respond and if the ABS engages correctly under different driving conditions. This comprehensive approach to diagnosis and testing ensures the ABS system in the Chevrolet Captiva functions reliably and safely.
A visual inspection must always
be performed to confirm presence of aftermarket components, potential collision
damage, or areas of concern.
ABS module is self monitoring. ...
Ensure the retaining tabs on the
brake fluid level indicator switch are fully engaged in the master cylinder
reservoir.
1.
Remove the underhood electri ...
Anti-Lock Brake System, Inspect
Brake Fluid Level Warning Indicator Switch R&R