177 POSSIBLEFAULTSONCRANKINGANDDYNAMICTESTING Note : For each Problem, all points respective to that S.No to be checked in order and rectified (Refer to ‘Flowchart’ sheet) SR. NO SENSOR /ACTUATOR FAULTVARIABLE FAULTDESCRIPTION TOCHECK TORECTIFY SYMPTOMS DTC CODE 3 Knock Sensor P0325 F_M_FCI_ACC_DECODE_APV_0 Accelerometer fault - signal to noise ratio is too low at idle 1. Sensor connection/Wrong knock sensor assembly 2. Grounding of Knock sensor / Torque to the bolt 3. Electrical wiring 4. I2C not correctly recorded in ECU 5. Test vehicle on road and check again the DTCcode Remove and connect again Ground Properly by tightening mounting bolt Terminal backout, wire open circuit & short circuit Re enter appropriate I2C Change sensor Check engine lamp at idle condition after the dynamic test 1. Crank Sensor connection 2. Electrical wiring 3. Sensor malfunctioning 4. Air Gap 5. Engine Cam shaft / Crank Shaft timing 6. Flywheel Teeth Dimension / Flywheel reference Remove and connect again Terminal backout, wire open circuit & short circuit Clean / Change sensor Put Copper washer Check timing and rectify Clean / Change wheel. Check flywheel reference Vehicle not starting. Check Engine lamp continously on during and after cranking 2 Crank Sensor P0335 F_M_APS_CRANKSHAFT_APV Crank signal Lost P0371 F_M_APS_EARLY_APV Crank signal fault - edges too close P0336 F_M_APS_GAP_MISSED_APV Crank signal fault - loss of gap P0372 F_M_APS_MISSING_APV Crank signal fault - missing tooth 1 CamSensor P0340 F_M_APS_CAM_MISSING_APV CAM signal fault - missing event P0341 F_M_APS_CAM_SYNC_APV CAMsignal fault - not synchronisedwith crank 1. Cam Sensor connection 2. Electrical wiring 3. Sensor malfunctioning / Air gap 4. Engine Cam / Crank Timing (bel t slippage) 5. Target camshaft Flag Dimension Remove and connect again Terminal backout, wire open circuit & short circuit Clean / Change sensor. Correct Air gap Check timing and rectify Clean / Change camshaft target Vehicle not starting. Check Engine lamp on cranking only and goes off 4 IMV, RPSensors and P0087 F_M_RPC_BUILD_APV Rail Pressure Build Error LP, HPCircuits P0088 F_M_OVER_PRESSURE_APV Rail pressure error - Over pressure P1253 F_M_RPC_CTRL_ERROR_APV Rail pressure control error (pressure error too high) - Negative P1254 F_M_RPC_CTRL_ERROR_APV Rail pressure control error (pressure error too high) - Positive P1256 F_M_IM_CONTROL_TRIM_APV Rail pressure control error (IMV current trim drift) - Low fuel low fault P1257 F_M_IM_CONTROL_TRIM_APV Rail pressure control error (IMV current trim drift) - Low fuel high fault P1258 F_M_IM_CONTROL_TRIM_APV Rail pressure control error (IMV current trim drift) - High fuel low fault P1259 F_M_IM_CONTROL_TRIM_APV Rail pressure control error (IMV current trim drift) - High fuel high fault 4. HP Circuit Problem Vehicle not starting; Check Engine and Poor accleration Refer to check points in S.No 4 of static testing Refer to check points in S.No 6 of static testing Fill if it is empty Remove air entrapment(Do not loosen HP pipes) Change if found defective Connect properly Remove & replace if choked, Tighten strainer & banjo joint properly Perform High Pressure Diagonistics (Contact LIS) 1. IMV fault present 2. HP sensor fault present 3. LP Circuit Problem A. Fuel level in diesel tank (check physically) B. Air in the circuit C. Air entry through Hand Priming Pump D. Filter connection and LP fuel lines E. Strainer in fuel tank 4. HP Circuit Problem
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