Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1 Date: 23/11/2022 Author: ERC Page 484 of 834 Copyright by TATA MOTORS Ltd. This document must not be used in any w ay, such as copying and redistributing to third parties, w ithout our consent P0561- 00- System Voltage Unstable Overview: Code Cause Effect on Vehicle Fault Code: P0561- 00 1. Abnormal difference between battery voltage and injector supply voltage. 2. High impedance in the circuit 3. Wiring harness problem 4. Alternator cut off circuit failure 1.CE Lamp ON 2. Reduced vehicle performance. Lamp status: Check Engine Lamp on Malfunction Indicator Lamp off Checkpoints: 1. Check Battery Voltage at key on (Nominal range – 11.5V to 12.8 V) Trouble Shooting Steps: Sr. No. Steps Specifications Step 1 Check the Battery voltage with the ignition switch on. If the voltage is too low then recharge the battery to 12.8 V - Step 2 Check whether the battery terminals are connected properly and they are tight. If not proper, do the necessary repair - Step 3 Check ECU connection: 1] Key off 2] Remove the ECU 3] Connect ECU connector Properly 4] Key on and Read the faults - Step 4 Check the charging circuit. In case of any problems in charging, do the necessary repair - Step 5 Check battery voltage through multimeter, and if ECU reads higher value than the measured value then replace the ECU. - Verification condition: Drive the vehicle in city and highway condition for 20 mins.
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