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OSPREY- Application
DTC Troubleshooting Data
Version: 4.0
Date: 10-02-2017
Prepared by: Mithipati Prasad
Checked by: G S Raju / Senthilnathan S
Page: 224 of 654
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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.
P0341: Cam Shaft Signal – Synchronization Fault
Overview:
DTC Description as per ISO standard
Camshaft Position Sensor “A” Circuit Range/
Performance
ECU Pin Number
34
Customer Symptom
Engine vibrations will be noticed at certain speeds if fault gets
detected during Engine running
Engine will not fire after fault detection.
Fault Effects (On Vehicle)
Engine vibrates at certain speeds if fault gets detected during Engine
running
EMS will disable engine start after fault detection.
Lamp Status (If Any)
CE lamp is on
Fault Detection Condition
This DTC gets logged if the ECU does not receive the cam sensor
signal within the defined window w.r.t crank signal ;(instead receives
it outside the window.)
If the cam movement is detected but the cam events are not in the
expected window position; if the rising and falling edge of the cam
flank is detected wrongly.
Normal Operating Condition
Diagnostic tool display the value of cam sensor status at idling
Probable Trouble Area
Camshaft sensor, Timing gear / belt btw Cam and crank shaft, ECU,
Grounding points, Wiring harness
Healing Condition
Clear the errors, Ignition OFF to ON
Component Details:
A typical Hall Effect Sensor has three wires or terminals: one for ground, one for supply or reference voltage and one for
the output signal. To produce an output signal, a Hall Effect Sensor must be supplied with a reference voltage. When a
metal / wheel passes through the air gap between the magnetic field (Magnet) and silicon chip (CAM sensor), it blocks the
magnetic field and causes the chip’s output voltage to suddenly drop to zero else the chip's output voltage is 4.7 Volts.
Preliminary Checks
x
Check whether the customer voice / view about the issue is matching with the fault effects mentioned above.
If yes, go ahead with next steps. If not, check for other DTC’s presence.
x
Check whether similar complaints are earlier reported. If yes, perform the preliminary checks with respect to
earlier issue closure.
x
Check sensor connections for rust dirt etc; Ensure clean connector pins and proper fitment.
x
Check cam shaft; Replace cam shaft if found damaged.
x
Check for timing gear is o.k. if found faulty replace it.
x
Visually check sensor. Check for metallic particles/burr in sensor tip; Clean the sensor tip and cam to remove
any foreign particle.
x
Check for crank signal also.