A Tests

A1-Air Line Leakage Above Strut Mount

Inspect lines and joints for air leak, using a soap and water solution. Ensure soap solution does not enter bearings on strut mount.

A2-Air Line Leak

Check air tubes and joints in air line for leakage. Check compressor assembly and air discharge solenoid valve seat for leakage.

A3-Pressure Switch

Check pressure switch for proper operating pressure. Pressure should be 137 psi with switch Off or 109 psi with switch On.

A-4 Air Leakage At Suspension Assembly

Remove front or rear suspension assembly, then apply air pressure. Place suspension assembly into water, then check for air leaks. Do not allow water to enter strut mount bearing. After checking for leakage, remove excess water from assembly using compressed air.

A5-Air Tank Leakage

Remove air tank assembly, then apply compressed air to tank by connecting suitable a 12 volt source to tank solenoid valve and compressor relay. Place tank assembly in water, then check for leakage.

A6-Vehicle Height Sensor

Fig. 6 Vehicle Height Sensor Terminal Identification:

Fig. 7 Vehicle Height Sensor Continuity Chart:

Compress and extend front or rear suspension assembly, then check for continuity between suspension assembly harness terminals, Fig. 6. Continuity should be as described, Fig. 7.

A7-Leakage Solenoid Valve

With compressed air applied to front or rear suspension system, disconnect air line from air joint furthest from suspension assembly, using tool No. 926520000, then check for leakage at assembly and solenoid valve.

A8-Break In Solenoid Valve

Connect a suitable 12 volt source to coupler, then check for operating noise or for continuity between terminals.

A9-Clogged Air Line

Check for foreign material or twisted lines and repair as necessary.

A10-Compressor Relay

Connect a suitable 12 volt source to solenoid valve, then apply compressed air and check that air passes through solenoid. If air does not pass through valve, replace.

A11-Compressor Malfunction

Connect a suitable 12 volt source to compressor and check for proper operation. If circuit breaker is tripped due to high temperatures, allow compressor to cool, then operation should return to normal.

A12-Compressor Relay

Fig. 8 Compressor Relay Terminal View:

Connect a suitable 12 volt source to terminal A, and ground terminal B, Fig. 8. Check that continuity exists between terminals C and D. Disconnect 12 volt source and check that no continuity exists between terminals C and D. Replace relay if continuity checks are not as specified.

A13-Electrical Circuit

When checking circuit, disconnect component from circuit and check for continuity. Also, check for proper grounding.