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Home >> Mazda >> 2013 >> 5 Grand Touring >> Repair and Diagnosis >> External Pages >> Different car >> Section 67 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0201, DTC P0202, DTC P0203, DTC P0204, DTC P0205 Or DTC P0206 >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different car, the 2003 Mazda Tribute. However, it is still accessible from the selected car via links, so may be relevant.
  1. If QUICK TEST was not performed, go to QUICK TEST  under SELF-DIAGNOSTIC SYSTEM. If QUICK TEST was performed, go to next step.
  2. Check Injector Fault PIDS -  Access INJ1F-INJ6F PIDs using scan tool. If an injector fault is present, go to next step. If an injector fault is not present, go to step  6.
    3. NOTE: Next step measures resistance of suspect fuel injector at breakout box terminals. Resistance measurement includes vehicle wiring harness and fuel injector.
    Fig 1: Identifying Fuel Injector Harness Connector & Breakout Box Terminals
    G00159002Courtesy of MAZDA MOTORS CORP.
  3. Check Fuel Injector(s) & Harness Resistance -  This erases Continuous Memory DTCs. Disconnect PCM 104-pin harness connector. Connect Breakout Box (49-UN01-130) to PCM harness connector only. See Figure. Use injector fault PID to determine fuel injector circuit(s) requiring testing. Measure resistance of fuel injector between suspect INJ circuit terminal and VPWR terminal No. 71 of breakout box. See Fig 1. If resistance reading is 11-18 ohms, replace PCM. After repair, go to step  6. If resistance reading is not as specified, go to next step.
  4. Check Fuel Injector Harness Resistance -  Disconnect fuel injector harness connector at suspect fuel injector. Measure resistance of VPWR circuit between breakout box terminal No. 71 and suspect fuel injector harness connector terminal. See Fig 1. Measure resistance of INJ circuit between appropriate breakout box terminal and fuel injector harness connector terminal. If each resistance reading is less than 5 ohms, go to next step. If each resistance reading is not as specified, repair open circuit in suspect wire. After repair, go to step  6.
  5. Check Fuel Injector Harness Circuit For Short To Power & Ground -  Measure resistance between suspect INJ circuit terminal and VPWR terminal No. 71 of breakout box. Measure resistance between suspect INJ circuit terminal and PWR GND terminal No. 103 of breakout box. If each resistance reading is more than 10,000 ohms, replace PCM. Repeat QUICK TEST  under SELF-DIAGNOSTIC SYSTEM. After repair, go to next step. If resistance reading is 10,000 ohms or less, repair short circuit. See appropriate WIRING DIAGRAM under ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS. After repair, go to next step.
  6. Verify Trouble Shooting Of DTCs Completed -  Reconnect all disconnected connectors. Clear DTCs from PCM memory using scan tool. Perform QUICK TEST  under SELF-DIAGNOSTIC SYSTEM. If same DTC is present, replace faulty PCM. Repeat QUICK TEST  under SELF-DIAGNOSTIC SYSTEM. If same DTC is not present, go to applicable procedure for other DTCs. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no DTCs are set, procedure is complete.
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