Diesel Engine Management System

DTC Troubleshooting (cont'd)

 11-52  

  1. Connect the MAF sensor 5P connector terminals No. 4 and No. 5 with a jumper wire.

Wire side of female terminals

MAF/IAT sensor 5P connector

JUMPER WIRE

  1. Turn the ignition switch ON (II).
  1. Check the MAF with the scan tool.

    Is about 5 V indicated?

YES – Replace the MAF/IAT sensor.

NO – Substitute a known-good ECM and recheck. If symptom/indication goes away, replace the original ECM.

NOTICE

The battery power supply short circuit to 5 V power supply damages the ECM.