Circuit/System Testing
WARNING: This page is about a different car, the 2009 GMC Canyon and 2009 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector.
- PPS module
- SDM
- PPS module wiring harness connector
- SDM wiring harness connector
- Ignition ON, observe the function of the inflatable restraint passenger air bag ON and OFF indicators. The inflatable restraint passenger air bag ON and OFF indicators should illuminate.
- If the inflatable restraint passenger air bag ON/OFF status indicators do not illuminate refer to Passenger Presence System Indicator Circuit Malfunction .
- Ignition OFF, disconnect the harness connector at the PPS module.
- Test for less than 1 ohm between the ground circuit terminal 5 and ground.
- If greater than the specified range, test the ground circuit for an open/high resistance
- Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 9 and ground.
- If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
- Disconnect the harness connector at the SDM.
- Test for infinite resistance between the serial data link terminal 18 and ground.
- If less than the specified range, test the serial data link for a short to ground.
- Test for less than 1 ohm between the PPS module serial data link terminal 18 and the SDM serial data link terminal 2.
- If greater than the specified range, test the serial data link for an open/high resistance.
- Ignition ON, test for less than 1-volt between the PPS module serial data link terminal 18 and ground.
- If greater than the specified range, test the serial data link for a short to voltage.
- If all circuits test normal, replace the PPS module.