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System Test: PS-1

  1. Indicates failure of solenoid valve or wiring harness (control unit to solenoid valve). To test, turn ignition off. Disconnect control unit connector. Connect ohmmeter between terminals "M" (Blue/Green wire) and "N" (Blue/Black wire) of control unit connector. See Fig 1 .
  2. If resistance does not measure 3.5-7.0 ohms, go to next step. If resistance measures 3.5-7.0 ohms, check for poor connections at control unit connector, solenoid valve connector and joint connectors. Recheck resistance. If resistance does not measure 3.5-7.0 ohms, replace control unit. If resistance measures as specified, system is okay.
  3. Check solenoid valve. See SOLENOID VALVE TEST. If solenoid valve is okay, repair wiring harness between control unit and solenoid valve. If solenoid valve is not okay, replace solenoid valve.
Fig 1: Identifying ECPS Control Unit Connector Terminals
G93F00831Courtesy of MAZDA MOTORS CORP.
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