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    2001 Chevrolet Prizm 1.8L MFI DOHC 4cyl

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    GM Buick/Oldsmobile/Pontiac/Full-Size 1975-1990 Repair Guide

    Electronic Level Control (ELC)

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    See Figures 1, 2 and 3

    The ELC system is an option to the standard rear suspension on late model station wagons. The system adjusts the trim height with varying vehicle loads. The system is activated when weight is added or removed from the rear of the vehicle. A height sensor is mounted to the body and rear suspension to monitor suspension height. As weight is added to the rear of the vehicle the sensor signals the electric air compressor mounted on the right front inner fender to supply air to the rear shocks to raise the vehicle to the proper level. As the weight is removed, the sensor signals the exhaust solenoid to release air from the rear shocks to lower the vehicle.



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    Fig. Fig. 1: Electronic level control pump and relay



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    Fig. Fig. 2: ELC hose fittings



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    Fig. Fig. 3: ELC height sensor

    REMOVAL & INSTALLATION



    Shocks

    The ELC shocks are removed the same way as the conventional shocks are removed. The only difference is the air hose has to be disconnected before shock removal

    Air Compressor
    1. Disconnect the negative (-) battery cable.
    2.  
    3. Disconnect the high pressure hose at the air dryer by rotating the spring clip 90° while holding the connector end and removing the tube assembly.
    4.  
    5. Disconnect the solenoid and motor connections.
    6.  
    7. Remove the support bracket screws, bracket and compressor.
    8.  

    To install:
    1. If replacing the compressor, install the dryer and bracket and torque the bolts to 34 inch lbs. (4 Nm). Install the bracket/compressor assembly and torque the screws to 24 inch lbs. (3 Nm).
    2.  
    3. Make all electrical and air connections.
    4.  
    5. Connect the negative battery cable. Cycle the ignition switch and test for system operation and leaks at the dryer.
    6.  

    Height Sensor

    The sensor is mounted onto the rear frame crossmember and right control arm.

    1. Disconnect the negative (-) battery cable and sensor connection.
    2.  
    3. Remove the link from the control arm, unbolt the sensor bracket and remove the sensor assembly from the vehicle.
    4.  

    To install:

    Install the sensor and adjust trim height as follows:

    1. Attach the link to the metal arm at the control arm.
    2.  
    3. To increase the vehicle trim height, move the plastic actuator arm upward and tighten the locknut.
    4.  
    5. To decrease the vehicle trim height, move the plastic actuator arm downward and tighten the locknut. Height sensor adjustment of 1° =1/4in. at the bumper. Adjustment of 5° total.
    6.  

     
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