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Test K: Shock Actuator Shorted To Ground

NOTE: Shock actuator is an integral part of shock. If actuator is defective, replace shock assembly.
  1. Check Shock Actuator Connector  Disconnect suspect shock/strut actuator connector. See Figure or Figure . Check connector for corrosion, bent pins and damaged wires. If connector is okay, go to next step. If connector is worn or damaged, repair as necessary and repeat ON-DEMAND SELF-TEST and PNEUMATIC TEST under DIAGNOSTIC TEST MODE  .
  2. Check Shock Actuator Resistance  Measure resistance between shock actuator terminals. If resistance is 15-21 ohms, go to next step. If resistance is not 15-21 ohms, replace shock assembly. Repeat ON-DEMAND SELF-TEST and PNEUMATIC TEST under DIAGNOSTIC TEST MODE  . Adjust riding height. See RIDING HEIGHT under ADJUSTMENTS & INSPECTION  .
  3. Check Circuit No. 430  Disconnect Vehicle Dynamics Module (VDM) 60-pin connector. VDM is located in trunk, behind package tray. Install Breakout Box (007-00033), leaving VDM disconnected. Measure resistance between ground and terminal No. 60 (Gray Wire) at breakout box. If resistance 3 ohms or less, go to next step. If resistance is 3 ohms or more, repair open in Gray wire. See WIRING DIAGRAMS  . Repeat ON-DEMAND SELF TEST and PNEUMATIC TEST under DIAGNOSTIC TEST MODE  .
  4. Check For Short To Ground  Measure resistance between breakout box test pin No. 60 (Gray wire) and suspect shock actuator test pin. See SHOCK ACTUATOR TEST PIN IDENTIFICATION TABLE. If resistance is 10,000 ohms or more, go to next step. If resistance is less than 10,000 ohms, repair short to ground in suspect shock actuator wire and repeat ON-DEMAND SELF-TEST and PNEUMATIC TEST under DIAGNOSTIC TEST MODE  .
    SHOCK ACTUATOR TEST PIN IDENTIFICATION

    Shock Actuator Test Pin No. Wire Color
    Left Front 51 White/Black
    Left Rear 54 White/Orange
    Right Front 53 White/Red
    Right Rear 52 White
  5. Check VDM  Connect VDM to breakout box. Hook-up New Generation Star (NGS) tester. See EQUIPMENT HOOK-UP  under TESTING & DIAGNOSIS. Rotate dial (on scan tester) to menu item DIAGNOSTIC DATA LINK, and press trigger to select. Select VDM-VEHICLE DYNAMICS MODULE. Select ACTIVE COMMAND MODES. Select SEMI-ACTIVE RIDE CONTROL. On 1996 models, select LFSHOCK, RFSHOCK, LRSHOCK or RRSHOCK. On 1997 models, select LFSH.SOFT, RFSH.SOFT, LRSH.SOFT or RRSH.SOFT. Command SOFT: ON. Measure voltage between test pins No. 60 (Gray wire) and suspect shock actuator test pin. See SHOCK ACTUATOR TEST PIN IDENTIFICATION TABLE in step 4). If voltage is 10 volts or more, go to next step. If voltage is less than 10 volts, replace VDM. Repeat ON-DEMAND SELF-TEST and PNEUMATIC TEST under DIAGNOSTIC TEST MODE  . Adjust riding height. See RIDING HEIGHT  under ADJUSTMENTS & INSPECTION.
  6. Check Circuit Voltage  Reconnect suspect shock actuator connector. Command SOFT: ON as in step 5). Measure voltage between test pins No. 60 (Gray wire) and suspect shock actuator test pin. See SHOCK ACTUATOR TEST PIN IDENTIFICATION TABLE in step 4). If battery voltage is present, no problem is indicated at this time. Fault may be intermittent. See WIGGLE TEST and SEMI-ACTIVE RIDE CONTROL under DIAGNOSTIC TEST MODES  . If battery voltage is not present, replace shock assembly. Repeat ON-DEMAND SELF-TEST and PNEUMATIC TEST under DIAGNOSTIC TEST MODE  . Adjust riding height. See RIDING HEIGHT  under ADJUSTMENTS & INSPECTION.
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