Warning Lamp (Check Suspension)

Figure 27:

The air suspension warning lamp, located in the overhead console, has three main functions:
1. During normal operation with the ignition in the RUN position, the lamp glowing continuously indicates a possible air suspension system problem.
2. During diagnostic testing the lamp blinks at a rate of 1.8 blinks per second to show that diagnostic routine (in the module) has been entered and then blinks the test number that is being run during the test sequence.
3. During the air spring fill routine the lamp blinks at a rate of 1 blink every two seconds to show that the air fill routine (in the module) has been entered.

Observation of the warning lamp during normal operation with the ignition switch ON, can aid in detecting some system problems.

NOTE: Refer to the Diagnostic Testing portion for problem diagnosis.

1. On a vehicle operating normally, the warning lamp will glow for approximately one second and then go out when the ignition is turned from the OFF to RUN position. The lamp does not operate when the ignition is in either the OFF or START position.
2. If lamp does not go out after turning the ignition from the OFF to RUN position, it indicates no battery power to the module.
3. If lamp glows for approximately 1/2 second, goes out, and then glows continuously after 5-8 seconds, when the ignition is turned from the OFF to RUN position, a height sensor or harness problem is indicated.
4. After ignition is turned from the OFF to RUN position, if the lamp comes on and glows continuously at any time after 8 seconds, a system problem is indicated.
5. Once the warning lamp comes on during an ignition ON cycle, it will glow continuously for that ignition ON cycle.
6. Erratic operation of the warning lamp (blinking or occasional flashing) during an ignition ON cycle indicates a system problem.