TIAGO AMT Gasoline DTC Troubleshooting Guide Version: 2.0 Date: 06-06-2016 Author: Sathi/Anupama Page: 420 of 424 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. 76 P188404 Reverse Lamp relay open circuit - open circuit on harness - open circuit on relay - open circuit on TCU -Wiring Harness connections - Reverse lamp relay - TCU connection 77 P188402 Reverse Lamp relay short to supply -Short circuit to Supply on harness -Short circuit to Supply on relay -Short circuit to Supply on TCU -Wiring Harness connections - Reverse lamp relay - TCU connection 78 P188401 Reverse Lamp relay short to ground -Short circuit to GND on harness -Short circuit to GND on relay -Short circuit to GND on TCU -Wiring Harness connections - Reverse lamp relay - TCU connection 79 P290401 Clutch System Not opening before shift -Clutch damage - actuator damage - valve damage -Clutch Electro valve -TCU - Clutch 80 P290402 Clutch System Closing during Engage -Clutch damage - actuator damage - valve damage -Clutch Electro valve -TCU - Clutch 81 P290403 Clutch System Overheat -Clutch slipping for a too long time -Wiring Harness Connections - Electro valve - TCU - Clutch 82 P290801 Clutch System Control error -Sudden clutch closure due to clutch command failure (hydraulic or mechanical damage) -Clutch Electro valve -TCU - Clutch 83 P190502 Clutch System Clutch Locked -clutch locked opened due to hydraulic or mechanical damage -Clutch Electro valve -TCU - Clutch 84 P290501 Gearbox System Disengage failed -Mechanical or hydraulic problem -Gear Electro valve - TCU - Gearbox 85 P290901 Gearbox System Shift failed -Mechanical or hydraulic problem -Gear Electro valve - TCU - Gearbox 86 P290502 Gearbox System engage failed -Mechanical or hydraulic problem -Gear Electro valve - TCU - Gearbox 87 P290503 Gearbox System unintended disengage -Mechanical or hydraulic problem -Gear Electro valve - TCU - Gearbox 88 P290902 Gearbox System Shift Locked -Mechanical or hydraulic problem -Gear Electro valve - TCU - Gearbox 89 P190B01 Gearbox System unintended engage -Mechanical or hydraulic problem -Gear Electro valve - TCU - Gearbox 90 P190C07 Gearbox System Control Error -Mechanical or hydraulic problem -Gear Electro valve - TCU - Gearbox
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