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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: 525 of 654
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.
x
Check the brake switch setting; if the problem is with the brake setting perform the necessary repairs.
x
Check whether the brake pedal is moving freely.
x
Loose/ Damaged Connections between APM sensor and EMS ecu.
x
Loose/ Damaged Connections between Brake switch connector and EMS ecu.
x
Check for back out of pins at both APM sensor connector, Brake switch connector and ECU connector.
x
Check for damage of pins at both APM sensor connector, Brake switch connector and ECU connector.
Trouble Shooting:
Step Checks
IF YES
IF NO
1.
Is there any rust/oxidization observed on Sensor Terminals Clean the Rust or
repair or replace
Go to Step 2
2.
Is there wiring harness electrical continuity between ECU
pins 37,78, 16 &Accelerator pedal Sensor connector pins
4,2,3.
Go to Step 3
Establish continuity
by rectifying
harness
connections as per
the circuit
schematic
3
Is there wiring harness electrical continuity between ECU
pins 38,76, 59 &Accelerator pedal Sensor connector pins
6,1,5.
Go to Step 4
Establish continuity
by rectifying
harness
connections as per
the circuit
schematic
4
Is there continuity exists between Main Brake switch pin X
and EMS ECU pin 39 && Main brake switch pin X and
battery supply.
Go to Step 5
Establish continuity
by rectifying
harness
connections as per
the circuit
schematic
5
Is there continuity exists between Brake redundant switch
pin X and EMS ECU pin 13 && redundant brake switch pin
X and ground
Go to Step 6
Establish continuity
by rectifying
harness
connections as per
the circuit
schematic
6
Whether EMS ECU pins 39 / 13 shorted to battery supply /
Ground?
Repair the harness
as per the schematic Go to Step 7
7. Are there any pins damaged at Sensor/EMS ECU
Connector
Replace the
connector or wiring
harness
Go to step 8
8
Are there any pins backed out from the Sensor/EMS ECU
Connector
Rectify/Replace
Connectors
Go to Step 9
9
Is APM Sensor Supply Pin 78 Short circuited to
Battery/GND or open?
Repair the harness
as per the schematic Go to step 10
10 Is APM Sensor Signal Pin 37/38 Short circuited to
Repair the harness
Go to Step 11