NEXON NEW MCE-2 DCT BS VI DTC Troubleshooting Guide Version: 1.0 Date: 16-06-2023 Author: Akash/Rahul Page:223 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. 62. P0880-84 Battery voltage input: too low for 1000ms Overview: ISO Code P0880-84 Customer Symptom • Transmission fault lamp ON • Gearshift disable • Creep function disable • Critical malfunction. Powertrain is opened. Power loss immediately triggered Fault Effects (On Vehicle) • Transmission fault lamp ON • Gearshift disable • Creep function disable • Critical malfunction. Powertrain is opened. Power loss immediately triggered Lamp Status (If Any) Transmission fault lamp ON Service indication 0x1 Fault Detection Condition Inject a battery voltage at the TCU between 4.0 and 4.4V Normal Operating Condition TCU does not detect any battery voltage related 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 two 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 the 28 pole vehicle TCU connectors are properly connected and free from damaged. Check if the connectors pins are damage/backout. If damaged, replace the wiring harness. Go to step 3 3 Check and save freezeframe data. Clear the DTC and check if the DTC does not come back Go to step 4 4 Replace the TCU if the problem persists & flash the adaption data from the previous TCU. Clear the DTC and check if the DTC does not come back
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