P1510

DTC P1510: ECM Back-Up Power Supply Malfunction

Wiring Diagram:

Wiring Diagram

Circuit Description
Battery voltage is supplied to keep DTC memory, values that ECM has learned to control engine, etc. in ECM even when ignition switch is turned OFF.

DTC Detecting Condition / Trouble Area:

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

NOTE: Check to make sure that the following condition is satisfied when using this "DTC Confirmation Procedure
- Intake air temp.: -8 °C (18 °F) or higher
- Engine coolant temp.: -8 - 110 °C (18 - 230 °F)
- Altitude (barometric pressure): 2400 m, 8000 ft or less (560 mmHg (75 kPa) or more)

1. Connect scan tool to DLC with ignition switch OFF.
2. Turn ON ignition switch and clear DTC, pending DTC and freeze frame data by using scan tool and run engine at idle speed for 1 min.
3. Check DTC by using scan tool.

Step 1 - 2:

DTC Troubleshooting