Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1.0 Date: 30/11/2019 Author: ERC Page 554 of 610 Copyright by TATA MOTORS Ltd. This document must not be used in any way, such as copying and redistributing to third parties, without our consent Check whether the accelerator pedal is free to move; Ensure free movement of the pedal; replace pedal if required. Check the brake switch setting; if the problem is with the brake setting perform the necessary repairs. Check whether the brake pedal is moving freely. Loose/ Damaged Connections between APM sensor and EMS ecu. Loose/ Damaged Connections between Brake switch connector and EMS ecu. Check for back out of pins at both APM sensor connector, Brake switch connector and ECU connector. 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 B59,B32,B15&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 B60, B36, B19&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 B39 && 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 B13 && 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 B39 /B13 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 B32/B36 Short circuited to Battery/GND or open? Repair the harness as per the schematic Go to step 10
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