P0560-117

P112 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0560-117: System Voltage

DTC P0560-117 - System Voltage

DESCRIPTION

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 if the power switch is turned OFF.






MONITOR DESCRIPTION

If 3 or more seconds have elapsed with a voltage of less than 2.5 V 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.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (HEV 20 A)




(a) Remove the HEV fuse from the engine room relay block.
(b) Measure the resistance of the HEV fuse.
Standard resistance:
Below 1 Ohms
(c) Reinstall the HEV fuse.
NG -- CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - HEV FUSE)
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - AUXILIARY BATTERY)
(a) Disconnect the negative auxiliary battery terminal.




(b) Disconnect the positive auxiliary battery terminal.




(c) Remove the HEV fuse from the engine room relay block.




(d) Disconnect the H15 HV control ECU connector.
(e) Measure the resistance between the wire harness side connectors.
Standard resistance (Check for open):





NOTE: When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder.
(f) Measure the resistance between the wire harness side connectors.
Standard resistance (Check for open):





NOTE: When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder.
(g) Reconnect the HV control ECU connector.
(h) Reinstall the HEV fuse.
(i) Reconnect the positive auxiliary battery terminal.
(j) Reconnect the negative auxiliary battery terminal.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- CHECK AND REPAIR CONNECTOR CONNECTION
3. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - HEV FUSE)




(a) Disconnect the H15 HV control ECU connector.




(b) Remove the HEV fuse from the engine room relay block.
(c) Measure the resistance between the wire harness side connectors.
Standard resistance (Check for short):





NOTE: When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder.
(d) Reinstall the HEV fuse.
(e) Reconnect the HV control ECU connector.
NG -- AFTER REPAIRING OR REPLACING HARNESS OR CONNECTOR, REPLACE FUSE (HEV 20 A)
OK -- REPLACE FUSE (HEV 20 A)