Pinpoint Test A: No Communication With The Air Suspension Module
WARNING: This page is about a different car, the 2004 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
Test Step
A1 CHECK CIRCUIT 296 (WH/VT) FOR AN OPEN
- Key in OFF position.
- Disconnect: Air Suspension Module C2131a.
- Key in ON position.
- Measure the voltage between air suspension module C2131a pin 16, circuit 296 (WH/VT), harness side and ground.
- Is the voltage greater than 10 volts?
Result / Action to Take
Yes
GO to A2.
No
REPAIR the circuit. REPEAT the self-test.
Test Step
A2 CHECK CIRCUIT 418 (DG/YE) FOR AN OPEN
- Measure the voltage between air suspension module C2131a pin 15, circuit 418 (DG/YE), harness side and ground and between air suspension module C2131a pin 15, circuit 418 (DG/YE), harness side and ground.
- Is the voltage greater than 10 volts?
Result / Action to Take
Yes
GO to A3.
No
REPAIR the circuit. REPEAT the self-test.
Test Step
A3 CHECK CIRCUIT 570 (BK/WH) FOR AN OPEN
- Key in OFF position.
- Measure the resistance between air suspension module C2131a pin 6, circuit 570 (BK/WH), harness side and ground.
- Is the resistance less than 5 ohms?
Result / Action to Take
Yes
GO to A4.
No
REPAIR the circuit. REPEAT the self-test.
Test Step
A4 CHECK FOR CORRECT AIR SUSPENSION MODULE OPERATION
- Disconnect all air suspension module connectors.
- Check for:
- corrosion
- pushed-out pins
- Connect all air suspension module connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Result / Action to Take
Yes
INSTALL a new air suspension module. REFER to MODULE-AIR SUSPENSION . TEST the system for normal operation.
No
The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.