NEXON NEW MCE-2 DCT BS VI DTC Troubleshooting Guide Version: 1.0 Date: 16-06-2023 Author: Akash/Rahul Page:232 of 645 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. 65. P0880-A3 Battery voltage input: too high for 1000ms Overview: ISO Code P0880-A3 Customer Symptom • Transmission fault lamp ON • Critical malfunction. Powertrain is opened. Power loss immediately triggered • Gearshifting disabled • Creep function disable Fault Effects (On Vehicle) • Transmission fault lamp ON • Critical malfunction. Powertrain is opened. Power loss immediately triggered • Gearshifting disabled • Creep function disable Lamp Status (If Any) Transmission fault lamp ON Service indication 0x1 Fault Detection Condition VBAT >= 16.5V AND VBAT < 18,6V Normal Operating Condition TCU does not detect any fault Probable Trouble Area 1. Battery voltage fault. 2. Wiring harness towards the TCU. 3. TCU. Healing Condition The reaction is cleared at SW restart and driving if the detection is FALSE for more than 1000 ms Component Details: There are 2 TCU power supplies – 1 Ignition and 1 battery power for driving valves and the hydraulic pump. The Problem may occur due to an electrical problem or internal damage to TCU. Preliminary Checks: 1) Blown out TCU power fuses (2 X 30 Amp) 2) Battery voltage and state of charge. 3) Loose Fitting TCU connectors. 4) Check for damage or back out of pins at TCU pin connector. 5) Check correct fitment of ground cable connections on vehicle chassis. Trouble Shooting:- Step Checks IF YES IF NO 1 Check if other modules in the vehicle are also reporting the battery voltage fault. Measure the battery voltage and check if it is within specified range. Take corrective action to fix this issue. Go to step 2 2 Check wiring harness towards the TCU. Check if the 28 pole vehicle connectors is properly fitted and free from damaged. Check if the TCU connectors pins are damaged/backout If damaged, replace the wiring harness. Go to step 3
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