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DTC 7-2: Left Front Solenoid

  1. Start engine. If ABS indicator light goes out, system has returned to normal. Check wiring between ABS control unit, ABS modulator unit and fail-safe relay for intermittent open or short. See WIRING DIAGRAMS  . If ABS indicator light stays on, verify DTC. If a code other than DTC 7-2 sets, see appropriate DTC. If DTC 7-2 resets, go to next step.
  2. Check ABS B1 fuse (20-amp) in underhood ABS fuse/relay block. Replace fuse if blown, and retest system. If fuse is okay, go to next step.
  3. Using DVOM, measure voltage between ground and underhood ABS fuse/relay block 4-pin connector terminal No. 4 (White/Green wire). See Figure . If battery voltage does not exist, replace underhood ABS fuse/relay block. If battery voltage exists, go to next step.
  4. Remove front fail-safe relay. Measure voltage between ground and fail-safe relay 4-pin connector terminal No. 1 (White/Green wire). See Figure . If battery voltage exists, go to next step. If battery voltage does not exist, repair open in White/Green wire between front fail-safe relay and underhood fuse/relay block. See WIRING DIAGRAMS  .
  5. Remove front fail-safe relay. Test front fail-safe relay. See ABS FAIL-SAFE RELAY & GAUGE RELAY TEST under DIAGNOSIS & TESTING. Replace relay as necessary. If relay tests okay, go to next step.
  6. Connect front fail-safe relay 4-pin connector terminals No. 1 (White/Green wire) and No. 3 (Brown/Black wire) together using a jumper wire. See Figure . Disconnect ABS modulator unit 14-pin connector. Using DVOM, measure voltage between ground and ABS modulator unit 14-pin connector terminals No. 7 and then No. 10 (Brown/Black wires). See Figure . If battery voltage does not exist on both wires, repair open in affected wire between front fail-safe relay and ABS modulator unit. If battery voltage exists on both wires, go to next step.
    NOTE: Leave jumper wire connected to terminals No. 1 and 3 of fail-safe relay connector until instructed to remove it in step 17).
  7. Measure resistance of inlet solenoids in ABS modulator unit by measuring between ABS modulator unit 14-pin connector terminals No. 9 and 13, No. 10 and 14, and No. 8 and 12. See Figure . Resistance should be 2.5-2.9 ohms for type "A" solenoids or 6.5-7.5 ohms for type "B" solenoids. If resistance is as specified, go to next step. If resistance is not as specified, check ABS modulator unit wiring. See WIRING DIAGRAMS  . Repair wiring as necessary. If wiring is okay, replace ABS modulator unit.
    NOTE: Manufacturer does not supply information on how to identify difference between solenoid types "A" and "B" in ABS modulator unit.
  8. Measure resistance of outlet solenoids in ABS modulator unit by measuring between ABS modulator unit 14-pin connector terminals No. 2 and 6, No. 3 and 7, and No. 1 and 5. See Figure . Resistance should be 2.5-2.9 ohms for type "A" solenoids or 3.3-3.9 ohms for type "B" solenoids. If resistance is as specified, go to next step. If resistance is not as specified, check ABS modulator unit wiring. See WIRING DIAGRAMS  . Repair wiring as necessary. If wiring is okay, replace ABS modulator unit.
  9. Check for continuity between ground and ABS modulator unit 14-pin connector terminals No. 3 (Yellow/Blue wire), and then No. 14 (Red/Blue wire). See Figure . If continuity does not exist, go to next step. If continuity exists, check ABS modulator unit wiring. See WIRING DIAGRAMS. Repair wiring as necessary. If wiring is okay, replace ABS modulator unit.
  10. Check for continuity between ABS modulator unit 14-pin connector terminal No. 14 (Red/Blue wire) and the following terminals:
    • No. 12 (Red/Black wire)
    • No. 3 (Yellow/Blue wire)
    • No. 1 (Yellow/Black wire)

    See Figure . If continuity exists, replace ABS modulator unit wiring harness. If continuity does not exist, go to next step.

  11. Check for continuity between ABS modulator unit 14-pin connector terminal No. 3 (Yellow/Blue wire) and the following terminals:
    • No. 12 (Red/Black wire)
    • No. 1 (Yellow/Black wire)

    See Figure . If continuity exists, replace ABS modulator unit wiring harness. If continuity does not exist, go to next step.

  12. Disconnect ABS control unit 26-pin connector. Using DVOM, check for continuity between ground and ABS control unit 26-pin connector terminals No. 1 (Red/Blue wire), and then No. 14 (Yellow/Blue wire). See Figure . If continuity does not exist, go to next step. If continuity exists, repair short to ground in Red/Blue wire or Yellow/Blue wire between ABS control unit and ABS modulator unit. See WIRING DIAGRAMS  .
  13. Check for continuity between ABS control unit 26-pin connector terminal No. 1 (Red/Blue wire) and the following terminals:
    • No. 15 (Yellow/Black wire)
    • No. 14 (Yellow/Blue wire)
    • No. 2 (Red/Black wire)

    See Figure . If continuity exists, repair short between ABS control unit 26-pin connector terminal No. 1 (Red/Blue wire) and affected circuit. See WIRING DIAGRAMS  . If continuity does not exist, go to next step.

  14. Check for continuity between ABS control unit 26-pin connector terminal No. 14 (Yellow/Blue wire) and the following terminals:
    • No. 15 (Yellow/Black wire)
    • No. 2 (Red/Black wire)

    See Figure . If continuity exists, repair short between ABS control unit 26-pin connector terminal No. 1 (Yellow/Blue wire) and affected circuit. See WIRING DIAGRAMS  . If continuity does not exist, go to next step.

  15. Reconnect ABS modulator unit 14-pin connector. Measure voltage between ground and ABS control unit 26-pin connector terminal No. 1 (Red/Blue wire), and then No. 14 (Yellow/Blue wire). See Figure . If battery voltage exists, go to next step. If battery voltage does not exist, repair open in Red/Blue wire or Yellow/Blue wire between ABS control unit and ABS modulator unit. See WIRING DIAGRAMS  .
  16. Disconnect ABS control unit 22-pin connector. Check continuity between ground and ABS control unit 26-pin connector terminal No. 25 (Black wire). See Figure . If continuity exists, go to next step. If continuity does not exist, repair open in Black wire between ground and ABS control unit 26-pin connector terminal No. 25. See WIRING DIAGRAMS  .
  17. Remove rear fail-safe relay. Remove jumper wire from front fail-safe relay connector. Check for continuity between ground and ABS control unit 22-pin connector terminal No. 1 (Yellow/Green wire). See Figure . If continuity does not exist, go to next step. If continuity exists, repair short to ground in Yellow/Green wire between ABS control unit and front fail-safe relay. See WIRING DIAGRAMS  .
  18. Ground terminal No. 2 (Yellow/Green wire) of front fail-safe relay using a jumper wire. See Figure . Check continuity between ground and ABS control unit 22-pin connector terminal No. 1 (Yellow/Green wire). See Figure . If continuity exists, go to next step. If continuity does not exist, repair open in Yellow/Green wire between front fail-safe relay and ABS control unit. See WIRING DIAGRAMS  .
  19. Check continuity between ground and front fail-safe relay connector terminal No. 4 (Black wire). See Figure . If continuity exists, check for poor connection at ABS control unit. If connection is okay, replace ABS control unit. If continuity does not exist, repair open in Black wire between ground and front fail-safe relay. See WIRING DIAGRAMS  .
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