|
|
(P0120) ELECTRONIC THROTTLE CONTROL MOTOR PERFORMANCE (CONTINUED) 2. CHECK FOR CURRENT DTC Note: Diagnose any other Throttle Body DTC(s) before continu- Note: The throttle plate should be free from binding and carbon Note: Ensure the throttle plate is at the idle position. Note: Inspect the engine for vacuum leaks. Note: If the PCM detects and stores a DTC, the PCM also stores T at the same time the DTC is displayed. Note: Before erasing stored DTCs, record these conditions. With the DRB III T , erase PCM DTCs. Note: It maybe necessary to road test the vehicle for this DTC to set. T , read PCM DTCs. Did this DTC set again? Yes >> Go To 3 If DTC P0121 APPS 5 VOLT SUPPLY CIRCUIT is present with this DTC, Go To 10 No >> Go To 25 3. CHECK FOR THROTTLE PLATE BINDING, STICKING, OR OBSTRUCTION Turn the ignition off. Remove the MAF Sensor. Open and close the throttle plate fully by hand to ensure there is not a binding or sticking condition and that there Did the throttle plate open and close freely? Yes >> Go To 4 No >> Repair the condition or replace the Throttle Body. (Refer to 14 - FUEL SYSTEM/FUEL INJECTION/ THROTTLE BODY - REMOVAL). ZH ENGINE - ELECTRICAL DIAGNOSTICS 9 - 77 |