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Q501 4 Cylinder MT Application
DTC Troubleshooting Data
Version: 0.1
Date: 21-Sep-2018
Prepared By: Mithi Prasad, Sarang Kulkarni, Manish Gupta
Checked By: Yogesh Jadhav
Approved By: Satish Kumar P
Page: 804 of 1052
Copyright ©
TATA MOTORS Ltd.
This document must not be used in any way, such as copying and redistributing to third parties, without the consent of author.
P0340-64: Camshaft Position Sensor “A” Circuit – Camshaft sensor signal invalid
Overview:
DTC Description (User Friendly)
Camshaft sensor signal invalid
ECU Pin Number
A037, A052, A051
Customer Symptom
Possible no start condition, Poor fuel economy (if Engine
Starts), Cruise Control Off, Reduced Torque Mode activated.
Fault Effects (On Vehicle)
Cruise Control Off, Reduced Torque Mode activated.
Lamp Status (If Any)
MIL OFF, CEL OFF
Fault Detection Condition (Root cause)
In between of several crankshaft revolutions there are too
many or too less camshaft edges present or the distance or
the series of the camshaft edges is implausible. The defect
de-bounce counter is incremented at each implausible
camshaft revolution, if reaches the counter the threshold
(Value - 4) the error is set.
Normal Operating Condition
If during the number (threshold value), of crankshaft
revolutions all camshaft edges are present and all edges are
inside the calibrated tolerance, the error is healed. For the
plausibility check of the camshaft signal the pattern matching
of the synchronization is used.
Probable Trouble Area
Wiring Harness connections between Camshaft sensor and
EMS ECU.
Camshaft position sensor 5-volt supply circuit shorted to
voltage
Camshaft position sensor position sensor signal circuit
shorted to voltage
Camshaft position sensor position sensor ground circuit
shorted to voltage
Camshaft position sensor 5-volt supply circuit open/high
resistance
Camshaft position sensor signal circuit open/high resistance
Camshaft position sensor ground circuit open/high resistance
Camshaft position sensor 5-volt supply circuit shorted to
ground
Camshaft position sensor signal circuit shorted to ground
Camshaft position sensor 5-volt supply circuit shorted to the
cmp sensor ground circuit
Camshaft position sensor signal circuit shorted to the cmp
sensor ground circuit
Camshaft position sensor or camshaft
EMS ECU faulty
Healing Condition
Rectify the error
Clear through diagnostic tool
Ignition OFF & ON