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Home › Mazda › 1993 › RX-7 Automatic › Repair and Diagnosis › Body & Frame › Door Locks › Anti-Theft System › System Testing › System Diagnostic › Test No. 1

Test No. 1

  1. Check ROOM fuse. If fuse is faulty, replace fuse (repair circuit if shorted). If fuse is okay, go to next step.
  2. Measure voltage at terminal 1A (Blue/Red wire) of CPU No. 2 (20-pin connector). SeeFig 1 . If battery voltage is not present, repair wiring between ROOM fuse and CPU No. 2. If battery voltage is present, go to next step.
  3. Check continuity between ground and terminal 1H (Black wire) of CPU No. 2 (20-pin connector). If there is no continuity, repair wiring between CPU No. 2 and ground. If there is continuity, go to next step.
  4. Measure voltage at terminal 1B (White wire) of CPU No. 2 (20-pin connector). If battery voltage is present, replace key reminder switch or repair wiring between ROOM fuse and CPU No. 2. If battery voltage is not present, go to next step.
  5. Disconnect 20-pin connector from CPU No. 2. Close passenger door. Open driver door. Check continuity between ground and terminal 1E (Blue/White wire) of CPU No. 2 (20-pin connector). If there is no continuity, go to next step. If there is continuity, go to step 7).
  6. Remove driver door switch. Check continuity between switch terminal and switch body with switch button released. If there is continuity, repair wiring between CPU No. 2 and door switch. If there is no continuity, replace door switch.
  7. Close driver door. Open passenger door. Check continuity between ground and terminal 1E (Blue/White wire) of CPU No. 2 (20-pin connector). If there is continuity, go to next step. If there is no continuity, go to step 9).
  8. Remove passenger door switch. Check continuity between switch terminal and switch body with switch button released. If there is continuity, repair wiring between CPU No. 2 and door switch. If there is no continuity, replace door switch.
  9. Disconnect 20-pin connector from CPU No. 2. Close hood and rear hatch. Check continuity between ground and terminal 1F (Green/Yellow wire) of CPU No. 2 (20-pin connector). If there is continuity, go to next step. If there is no continuity, check continuity between ground and terminal 1G (Brown/Yellow wire) of CPU No. 2 (20-pin connector). If there is continuity, go to step 11). If there is no continuity, go to step 12).
  10. Remove cargo compartment light switch. Check continuity between switch connector terminals. With switch button pushed (rear hatch closed), there should be no continuity. With switch button released (rear hatch open), there should be continuity. If continuity is not as specified, replace switch. If continuity is as specified, repair wiring between CPU No. 2 and switch.
  11. Disconnect hood switch connector. Check continuity between switch connector terminals. With switch lever pushed (hood closed), there should be no continuity. With switch lever released (hood open), there should be continuity. If continuity is not as specified, replace switch. If continuity is as specified, repair wiring between CPU No. 2 and switch.
  12. Remove security light. Measure voltage at Blue/Red wire terminal of security light connector. If battery voltage is not present, repair wiring between ROOM fuse and CPU No. 2. If battery voltage is present, go to next step.
  13. Check continuity between security light connector terminals. If there is no continuity, replace security light. If there is continuity, go to next step.
  14. Check continuity between Violet/Green wire terminal of security light connector and terminal 1R (Violet/Green wire) of CPU No. 2 (20-pin connector). If there is no continuity, repair wiring between security light and CPU No. 2. If there is continuity, replace CPU No. 2.
Fig 1: CPU No. 2 (20-Pin Connector) Terminal ID
G93D82555Courtesy of MAZDA MOTORS CORP.
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