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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: 742 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.
P0219-3A: Engine Over speed Condition – Engine overspeed recognition
Overview:
DTC Description (User Friendly)
Engine over-speed recognition
ECU Pin Number
A020, A021
Customer Symptom
Clutch Slippage might happen
Fault Effects (On Vehicle)
Clutch Slippage might happen
Lamp Status (If Any)
-
Fault Detection Condition (Root cause)
EMS detects Engine speed > 5400 RPM.
Normal Operating Condition
Engine Speed < 5400 RPM
Probable Trouble Area
Driver over-speeding vehicle.
Crank Shaft sensor wiring connections with EMS ECU.
Connector of Crank shaft sensor.
Crank Shaft Sensor
EMS ECU faulty
Healing Condition
Rectify the error
Clear through diagnostic tool
Ignition OFF & ON
Component Details:
This is fitted on the crankcase and faces the phonic wheel on the flywheel. It is inductive type, i.e. its operation is
determined by magnetic field changes generated by the teeth passing in front of the phonic wheel. The changeover from
full to empty determined by the presence or absence of a gap brings about a magnetic flux change sufficient to generate
an induced alternating voltage proportional to the number of teeth on the ring (or phonic wheel). The frequency and
amplitude of the voltage send to the electronic control unit provides the latter with an indication of the engine angular
speed. The sensor output signal approximates a sine wave whose frequency is proportional to engine speed and
amplitude is approximately proportional to engine speed. Active edge is generated from zero crossing point positive to
negative transition.
Preliminary Checks:
1. Check whether the customer voice / view about the issue is matching with the fault effects mentioned in above
Table. If yes, go ahead with next steps. If not, check for other DTC’s presence.
2. Check whether other customers report similar complaints earlier. If yes, perform the preliminary checks with
respect to earlier issue closure.
3. Driver over-speeding the vehicle.
4. Loose/ Damaged Connections between Crank shaft Sensor and EMS ECU.
5. Check for damage / back out of pins at ECU connector.
6. Check for damage / back out of pins at crank shaft sensor’s connector.
Trouble Shooting:
Step Checks
IF YES
IF NO
1
Is there wiring harness electrical continuity between ECU
pin A020 & Crank Shaft sensor pin 1, ECU pin A021 and
Crank shaft sensor pin 2.
Go to next step
Rectify the wiring
harness
connections as per