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ELECTRONIC AIR SUSPENSION 1 FAULT DIAGNOSIS REAR SUSPENSION FAULTS This section covers possible mechanical, fuse and relay faults that could occur in the rear suspension system, 1. Symptom - Hard Ride. POSSIBLE CAUSE REMEDY 1. Seized or inoperable rear shock absorber/s. 1. Renew shock absorber/s. See Repair. 2. Loss of air pressure in the air system resulting in the chassis 2. Check air system components for faults and air harness for leaks etc. See FRONT SUSPENSION, Repair. Rectify or renew components where necessary. 3. Contaminated or fouled suspension components with 3. Remove/clean off debris and check for damage. Renew components where necessary. 4. Incorrect ride height calibration. 4. Re-calibrate air suspension system. Refer to TestBook . 2. Symptom - Vehicle Suspension Permanently In ’Standard Height’ Mode. POSSIBLE CAUSE REMEDY 1. Height sensor/s inoperative due to loose or disconnected 1. Reconnect multi-plug. 2. Height sensor linkage disconnected or damaged. 2. Reconnect or renew sensor linkage. 3. Faulty height sensor/s. 3. Renew height sensor/s. See Repair. 4. Leaking air supply to air spring assembly. 4. Check air harness connections and pipes for damage or scoring. 5. Faulty/leaking air spring diaphragm. 5. Renew air spring assembly. See Repair. 6. Faulty ABS speed sensor in ECU. 6. Refer to TestBook . 7. Faulty pressure switch. 7. Refer to TestBook . |