1033 / 1526
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 Ti
ming (belt
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