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(P1612) MAXIMUM GOVERNOR SPEED DEVIATION - FUEL LIMITING (CONTINUED) 2. CHECK FOR CURRENT DTC 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 T , read PCM DTCs. Did this DTC set again? Yes >> Go To 3 No >> Go To 10 3. THROTTLE PLATE STUCK OPEN Turn the ignition off. Remove the Air Cleaner Housing (Refer to 9 - ENGINE/AIR INTAKE SYSTEM/AIR CLEANER HOUSING - Check for any signs of a foreign material causing the throttle plate to remain open. Manually open and close the throttle plate using your hands. Does the Throttle Plate move? Yes >> Go To 4 No >> Remove the debris if possible or replace the Throttle Body. (Refer to 14 - FUEL SYSTEM/FUEL INJEC- TION/THROTTLE BODY - REMOVAL). Disconnect the Battery when replacing the Throttle Body. Perform POWERTRAIN VERIFICATION TEST - VER 2. 4. THROTTLE CONTROL MOTOR 2 CIRCUIT SHORT TO VOLTAGE With the ignition off. Disconnect the PCM C1 harness connectors and the Throttle Body Note: Check connectors — Clean/repair as necessary. Measure the voltage of the Throttle Control Motor 2 circuit at the Is the voltage below 1.0 volt? Yes >> Go To 5 No >> Repair the Throttle Control Motor 2 circuit for a short to voltage. Perform POWERTRAIN VERIFICATION TEST - VER 2. ZH ENGINE - ELECTRICAL DIAGNOSTICS 9 - 645 |