DTC 117

DTC 117 SYSTEM VOLTAGE

CIRCUIT DESCRIPTION

DTC Detection Condition:

Since the ECU back-up power source is used for DTCs and freeze frame data memory, the back-up power source (BATT) continues to be supplied to the HV control ECU even though the power switch is turned OFF.

MONITOR DESCRIPTION

Monitor Strategy:

Typical Enabling Conditions:

Typical Malfunction Thresholds:

Component Operating Range:

If 3 or more seconds have elapsed with a voltage of 3.3 V or less at the BATT terminal at the HV control ECU, the HV control ECU will determine that a malfunction has occurred in the back-up power supply system, and set a DTC. It will illuminate the MIL the next time the engine is started.

Wiring Diagram:

Step 1:

Step 2:

Step 3:

INSPECTION PROCEDURE