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HOMESERVICE MANUALSMAZDA2008TRIBUTE S SPORT, 4WDREPAIR AND DIAGNOSISENGINE PERFORMANCEFUEL DELIVERYSYMPTOM TROUBLESHOOTING [ENGINE/FUEL - EXCEPT HYBRID]GENERATOR/REGULATOR SYSTEM MALFUNCTION
2008 Mazda Tribute s Sport, 4WD

Generator/Regulator System Malfunction

2008 Mazda Tribute s Sport, 4WDSECTION Generator/Regulator System Malfunction
PROBLEM SYMPTOMS CHART - GENERATOR/REGULATOR SYSTEM MALFUNCTION

DTC P0622 AND P1246 GENERATOR/REGULATOR SYSTEM MALFUNCTION
DETECTION CONDITION
  • P0622 and P1246 indicates the generator load input is not within a calibrated limit for a calibrated amount of time.
POSSIBLE CAUSE
  • generator/regulator (10346)
  • powertrain control module (PCM) (12A650)
HINT Generator/Regulator Description 
  • The generator communication (GEN COM) line communicates the desired setpoint from the PCM to the voltage regulator.
  • The generator monitor (GEN MON) line communicates the generator load and error conditions to the PCM.
  • The third circuit on the voltage regulator, the B/Y circuit, is a dedicated battery voltage sense line.
INSPECTION CHART - GENERATOR/REGULATOR SYSTEM MALFUNCTION

STEP INSPECTION ACTION
1 CHECK THE GENERATOR CIRCUITRY AND OPERATION
NOTE:
  • If the concern is still present after checking the generator circuitry in the workshop manual, return to Troubleshooting 01-01 to continue generator diagnosis.
  • Check the generator circuitry and operation. Refer to the , Charging System. See CHARGING SYSTEM  . Follow the diagnostics for the symptoms or DTCs as directed.
  • Is the charging system diagnosed and repaired in the Workshop Manual, Charging System? 
 Yes The system is operating correctly at this time.
No GO to the next step.
2 CHECK THE GENERATOR MONITOR SIGNAL
  • Key ON, engine running (KOER).
  • Access the PCM and monitor the GENMN GFS PID.
  • Is the duty cycle between 5% and 97% and not excessively fluctuating? 
 Yes The system is operating correctly at this time.
No GO to the next step.
3 VERIFY TROUBLESHOOTING OF DTCs COMPLETED
NOTE:
  • When the battery (or PCM) is disconnected and connected, some abnormal drive symptoms may occur while the vehicle relearns its adaptive strategy. The charging system set point may also vary. The vehicle may need to be driven to relearn its strategy.
  • Disconnect all the PCM connectors.
  • Visually inspect connectors for:
    • damaged pins
    • pushed out pins
    • corrosion
  • Make sure to connect all disconnected connectors.
  • Clear DTCs from PCM memory using IDS or equivalent tester generic OBD II function.
  • Carry out the PCM Quick Test. See PCM QUICK TEST  .
  • Is the same DTC present? 
 Yes INSTALL a new PCM. See POWERTRAIN CONTROL MODULE (PCM) - 2.3L REMOVAL/INSTALLATION .
REPEAT the PCM Quick Test. See PCM QUICK TEST  .
No If any other DTC is present, GO to applicable DTC inspection.
If no DTC is present, troubleshooting complete.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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