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Code 7-2, Left Front Solenoid

  1. Start engine. If ANTI-LOCK light does not go off, go to next step. If light goes off, system is okay at this time. Check connectors and wire harness between control unit, fail-safe relay and modulator.
  2. Check for ABS trouble codes. If Code 7-2 is not set, perform appropriate trouble code test. If Code 7-2 is set, check ABS No. 1 fuse in underhood ABS fuse/relay box. If fuse is okay, go to step 8). If fuse is not okay, measure voltage between ABS No. 1 fuse holder terminals. See Figure .
  3. If battery voltage is not present, go to step 5). If battery voltage is present, disconnect 4-pin connector from underhood ABS fuse/relay box. Measure voltage between ABS No. 1 fuse holder terminals. See Figure .
  4. If battery voltage exists, replace underhood ABS fuse/relay box. If battery voltage is not present, White/Green wire between underhood ABS fuse/relay box and front fail-safe relay is shorted to ground.
  5. Disconnect modulator 14-pin connector. Install new ABS No.1 fuse (20-amp) in underhood ABS fuse/relay box. Disconnect front fail-safe relay connector. Measure voltage between White/Green wire and Brown/Black wire terminals of front fail-safe relay connector.
  6. If battery voltage is present, Brown/Black wire between front fail-safe relay and modulator is shorted to ground. If battery voltage is not present check continuity between ground and following modulator terminals: No. 5 (Gray/Black wire), No. 7 (Gray/Blue wire), No. 8 (White/Black wire) and No. 10 (White/Blue wire). See Figure .
  7. If continuity exists, inspect modulator wire harness. If wire harness is okay, replace modulator. If continuity does not exist, reconnect front fail-safe relay connector and modulator 14-pin connector and retest.
  8. Reinstall ABS No. 1 fuse in fuse/relay box. Measure voltage between White/Green wire terminal of underhood ABS fuse/relay box 4-pin connector and ground. If battery voltage is present, go to next step. If battery voltage is not present, replace underhood ABS fuse/relay box.
  9. Disconnect front fail-safe relay connector. Measure voltage between White/Green wire terminal of fail-safe relay connector and ground.If battery voltage is present, go to next step. If battery voltage is not present, repair open White/Green wire between underhood ABS fuse/relay box and fail-safe relay.
  10. Test front fail-safe relay and replace as necessary. See RELAY TEST under DIAGNOSIS & TESTING. Disconnect modulator 14-pin connector. Connect jumper wire between White/Green wire and Brown/Black wire terminals of front fail-safe relay connector.
    NOTE: Modulator 14-pin connector has more than one Brown/Black wires. Ensure appropriate wire is tested.
  11. Measure voltage between 14-pin harness connector terminal No. 7 and ground. See Figure . If battery voltage is present, go to next step. If battery voltage is not present, repair open in appropriate Brown/Black wire between front fail-safe relay and modulator.
  12. Measure voltage between 14-pin harness connector terminal No. 10 and ground. If battery voltage is present, go to next step. If battery voltage is not present, repair open in appropriate Brown/Black wire between front fail-safe relay and modulator.
  13. Measure resistance between Yellow/Blue wire and Gray/Blue wire terminals of modulator. If resistance is 2.5-2.9 ohms, go to next step. If resistance is not 2.5-2.9 ohms, inspect modulator wire harness. If wire harness is okay, replace modulator.
  14. Check continuity between Yellow/Blue wire terminal of modulator and ground. If continuity does not, go to next step. If continuity exists, inspect modulator wire harness. If wire harness is okay, replace modulator.
  15. Measure resistance between White/Blue wire and Red/Blue wire terminals of modulator. If resistance is 2.5-2.9 ohms, go to next step. If resistance is not 2.5-2.9 ohms, inspect modulator wire harness. If wire harness is okay, replace modulator.
  16. Check continuity between Red/Blue wire terminal of modulator and ground. If continuity does not exist, go to next step. If continuity exists, inspect modulator wire harness. If wire harness is okay, replace modulator.
  17. Check continuity between following terminals of modulator: Red/Blue wire and Yellow/Blue wire; Red/Blue wire and Red/Black wire; Red/Blue wire and Yellow/Black wire. If continuity does not exist, go to next step. If continuity exists, replace modulator wire harness.
  18. Check continuity between following terminals of modulator: Yellow/Blue wire and Red/Black wire; Yellow/Blue wire and Yellow/Black wire. If continuity does not exist, go to next step. If continuity exists, replace modulator wire harness.
  19. Disconnect control unit 26-pin connector. Check continuity between Yellow/Blue wire terminal of 26-pin connector and ground. If continuity does not exist, go to next step. If continuity exists, Yellow/Blue wire between control unit and modulator is shorted to ground.
  20. Check continuity between Red/Blue wire terminal of 26-pin connector and ground. If continuity does not exist, go to next step. If continuity exists, Red/Blue wire between control unit and modulator is shorted to ground.
  21. Check continuity between following terminals of 26-pin connector terminals: Red/Blue wire and Yellow/Blue wire; Red/Blue wire and Red/Black wire; Red/Blue wire and Yellow/Black wire. If continuity does not exist, go to next step. If continuity exits, repair shorted wire(s) between control unit and modulator.
  22. Check continuity between following terminals of 26-pin connector terminals: Yellow/Blue wire and Red/Black wire; Yellow/Blue wire and Yellow/Black wire. If continuity does not exist, go to next step. If continuity exists, repair shorted wire(s) between control unit and modulator.
  23. Connect modulator 14-pin connector. Measure voltage between Yellow/Blue wire terminal of 26-pin connector and ground. If battery voltage exists, go to next step. If battery voltage is not present, repair open Yellow/Blue wire between control unit and modulator.
  24. Measure voltage between Red/Blue wire terminal of 26-pin connector and ground. If battery voltage exists, go to next step. If battery voltage is not present, repair open Red/Blue wire between control unit and modulator.
  25. Check continuity between Black wire terminal of control unit 26-pin connector and ground. If continuity exists, go to next step. If continuity does not exist, check ground connection. If ground connection is okay, repair open Black wire between control unit and ground. 26) Disconnect control unit 22-pin connector. Connect jumper wire between Yellow/Green wire terminal of 22-pin connector and ground. Remove jumper wire from front fail-safe relay.
  26. Disconnect rear fail-safe relay connector. Check continuity between Yellow/Green wire terminal of front fail-safe relay connector and ground. If continuity exists, go to next step. If continuity does not exist, repair open Yellow/Green wire between control unit and front fail-safe relay.
  27. Remove jumper wire from Yellow/Green wire terminal of 22-pin connector. Check continuity between Yellow/Green wire terminal of front fail-safe relay connector and ground. If continuity does not exist, go to next step. If continuity exists, Yellow/Green wire between control unit and front fail-safe relay is shorted to ground.
  28. Check continuity between Black wire terminal of front fail-safe relay connector and ground. If continuity does not exist, check ground connection. If ground connection is okay, repair open Black wire between front fail-safe relay and ground.
  29. If continuity exists, check for loose control unit connectors. If connectors are okay, install known-good control unit and retest.
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