Table 1-74 (Continued) 96 S/N Operation Test Results Actions 4 Disconnect the coolant temperature sensor, and start the engine. Check the engine under warm-up for unstable idle speed. Yes Replace sensor No Next step 5 Remove the fuel injector. Check the fuel injector for leakage, blockage or abnormal flow with a special fuel injector cleaner & analyzer. Yes Remove the trouble No Next step 6 Check the fuel for normal operation. Yes Replace fuel No Next step 7 Check the pressure for each cylinder of the engine. Are they great different? Yes Remove the mechanical troubles for the engine No Next step 8 Connect the electronic injection system adapter. Turn on the ignition switch.
Check the power supply of the pin 12#, 13#, 44#, 45#, 63#. Check the grounding of the pin 3#, 51#, 53#, 61#, 80#. Are they OK? Yes Diagnosis help No Check and repair relevant line