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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: 498 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.
P2135: Accelerator Pedal Sensor - Track 1 And 2 Correlation
Overview:
DTC Description as per ISO standard
Pedal sensor fault (correlation between track 1 and 2)
ECU Pin Number
37, 78, 16, 38
Customer Symptom
Poor response from Accelerator Pedal
Fault Effects (On Vehicle)
Reduced torque mode is activated;
Pedal reduction (P1121) is set
Pedal position taken as minimum of Track 1 & Track
–
2
EGR is disabled.
Lamp Status (If Any)
CE Lamp is on
Fault Detection Condition
1. This DTC gets logged if the difference between Pedal Track
- 1 input and Pedal Track
–
2 input, exceed the threshold
Normal Operating Condition
Diagnostic tool display the value of accelerator pedal pressed
in % at ignition ON condition
Probable Trouble Area
Accelerator Pedal sensor
Related wiring Harness, connector or terminals of APM sensor
connector / W/H connector
EMS ECU
Healing Condition
Rectify the error
Clear through diagnostic tool
Ignition OFF & ON
Component Details:
For safety reasons, the accelerator pedal sensor is equipped with 2 resistors (potentiometers) with varying operating
ranges (0.75
–
4.45 V and 0.38
–
2.23 V) and separate circuits. A potentiometer informally a pot, is a three- terminal
resistor with a sliding contact that forms an adjustable voltage divider. If only two terminals are used, one end and the
wiper, it acts as a variable resistor or rheostat. Based on the Accelerator pedal position, Engine will produce the driver
demanded torque based on the accelerator pedal position.
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 presen
ce.
x
Check whether similar complaints are earlier reported. If yes, perform the preliminary checks with respect to
earlier issue closure.
x
Check for Reference voltage 2 fault (P0642, P0643) if present; Follow Reference voltage2(sensor supply
voltage2) check and rectification Procedure, to correct this fault before proceeding further.
x
Check for Reference voltage 1 fault (P0652, P0653) if present; Follow Reference voltage1 (sensor supply
voltage1) check and rectification Procedure, to correct this fault before proceeding further
x
Check the pedal connector connected to the pedal sensor/ module.
x
Check sensor connections for rust dirt etc; clean the sensor connections and ensure proper fitment.
x
Check Intermediate connector; Remove Intermediate connector between EMS harness and vehicle wiring
harness. Check for terminal back out. Do necessary repairs, then reconnect and check the fault.