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*CHECKING THE ACCELERATOR PEDAL SENSOR CALIBRATION Possible Causes MIS-WIRED APPS VOLTAGE NOT CHANGING DURING SWEEP THROTTLE PEDAL NOT MOVING FREELY APPS Diagnostic Test 1. MIS-WIRED APPS Turn the ignition off. Remove the APPS cover. Inspect both APPS connector and ECM for proper wiring. Are both connectors wired correctly? Yes >> Go To 2 No >> Repair mis-wired APPS connector at APPS or ECM. Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC- 2. THROTTLE PEDAL NOT MOVING FREELY Ignition on, engine not running. Look for proper Throttle operation. Does the Throttle Pedal move freely between the upper and lower stops? Yes >> Replace the APPS. Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC- No >> Repair as necessary. Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC- 9 - 1478 ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL DR/DH |