Pinpoint Test J: DTC C1830 - Air Compressor Relay Circuit Failure
WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
The Flex Probe Kit must be used for all test connections. Use of standard multimeter probes may damage wiring terminals.
- J1 CHECK THE AIR COMPRESSOR RELAY CONNECTOR
- Key in OFF position.
- Disconnect: Air Compressor Relay.
- Check the air compressor relay connector pins and terminals for bent or broken pins, spread terminals, corrosion, moisture or other damage.
- Is the air compressor relay connector OK?
Yes : GO to J2.
No : REPAIR as necessary. CLEAR the DTC. REPEAT the self-test.
- J2 CHECK THE POWER TO THE AIR SUSPENSION RELAY
- Measure the voltage between ground and:
- air compressor relay cavity 1, circuit 1053 (LB/PK), harness side.
- air compressor relay cavity 3, circuit 1053 (LB/PK), harness side.
- Are the voltages greater than 10 volts?
Yes : GO to J3.
No : VERIFY BJB fuse 112 (30A) is OK. If OK, REPAIR circuit 1053 (LB/BK) for an open. CLEAR the DTC. REPEAT the self-test.
- Measure the voltage between ground and:
- J3 CHECK CIRCUIT 420 (DB/YE) FOR AN OPEN
- Key in OFF position.
- Disconnect: Air Suspension Module C2131b.
- Measure the resistance between air suspension module C2131b-23, circuit 420 (DB/YE), harness side and air compressor relay cavity 2, circuit 420 (DB/YE) harness side.
- Is the resistance less than 5 ohms?
Yes : GO to J4.
No : REPAIR circuit 420 (DB/YE) for an open. CLEAR the DTC. REPEAT the self-test.
- J4 CHECK CIRCUIT 420 (DB/YE) FOR A SHORT TO GROUND
- Measure the resistance between air suspension module C2131b-23, circuit 420 (DB/YE), harness side and ground.
- Is the resistance greater than 10,000 ohms?
Yes : GO to J5.
No : REPAIR circuit 420 (DB/YE) for a short to ground. CLEAR the DTC. REPEAT the self-test.
- J5 CHECK THE AIR COMPRESSOR RELAY COIL FOR AN OPEN
- Measure the resistance between air compressor relay pin 1, component side and pin 2, component side.
- Is the resistance greater than 10,000 ohms?
Yes : INSTALL a new air compressor relay. CLEAR the DTC. REPEAT the self-test.
No : INSTALL a new air suspension module. REFER to AIR SUSPENSION MODULE . REPEAT the self-test.