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Nexon Gasoline – EMS ECU Bosch
DTC Troubleshooting Manual
Version: 0.1
Date: 26-08-2017
Prepared By: Sunu S Babu/Yogesh Jadhav
Checked By: Yeshwant Jadhav
Approved By: Satish Kumar
Document Part No: 2921 02 224 A1736
Page: 47 of 1203
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.
P0014-77: “B” Camshaft Position Actuator Circuit– Commanded Position Not Reachable
Overview:
ISO Code
P0014-77
Customer Symptom
MIL turns ON.
Fault Effects (On Vehicle)
Symptom can be:-
1. RPM oscillation
2. Improper combustion
3. Manifold pressure will be affected which may leads to
throttle leakage
4. Emission may exceed the limit
Lamp Status (If Any)
MIL ON after 3 drive cycle
Fault Detection Condition
1. Faulty oil control valve
2. Leakage in the oil gallery
3. Less quantity of oil
4. Less oil temperature
5. Miss alignment of camshaft
6. Camshaft stuck machanically
Normal Operating Condition
When the signal rate is within threshold
Probable Trouble Area
VVT Actuator mechanical stuck, Oil Contro,Valve, Oil
Leakage, Oil temperature and quantity, Miss Alignment of
Camshaft Sensor, Wiring Harness connections, Faulty ECU
Healing Condition
After 3 drive cycles
Fault present deletion
1. Clear DTC Command form Scan tool
2. Stack Over Flow.
3. 40 warm up cycles.
4.ECU flashing
5. ECU power fail
Component Details:
The variable camshaft timing oil control solenoid is attached to camshaft and is hydraulically operated in order to
change the angle of the camshaft relative to crankshaft position. The variable camshaft timing oil control solenoid is
controlled by the EMS ECU. The EMS ECU sends a pulse width modulated 12 volt signal to a variable camshaft
timing oil control solenoid. The solenoid controls the amount of engine oil flow
Preliminary Checks:
1. Check mechanically lock pin is proper
2. Check control spring is perfectly fine
3. Check the continuity from Sensor connector pins to the ECU pins.