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Home >> Isuzu >> 2007 >> Ascender RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 4.2L - DTC P0013 To DTC P0134 >> DTC P0102 or P0103 >> Component Testing

Component Testing

  1. Ignition OFF, disconnect the MAF/IAT harness connector at the MAF/IAT sensor.
  2. Connect a set of jumper wires between the MAF/IAT harness connector and the MAF/IAT sensor.
  3. Idle or drive the vehicle to completely warm-up the ECT to the normal operating range.
  4. Engine idling, test for 1,500-3,500 Hz. between the signal circuit terminal A and ground with a DMM.
    • If the frequency is not within the specified range, replace the MAF sensor.
    • If the frequency is within the specified range, replace the PCM.
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