Hybrid Control System

HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM: P0560-117: System Voltage
P0560-117 - System Voltage

DESCRIPTION

- Battery power is constantly supplied to the BATT terminal of the hybrid vehicle control ECU to allow DTCs and freeze frame data to be retained in memory even though the power switch is turned off. The back-up power is supplied even when the power switch is off.





MONITOR DESCRIPTION

If a period of time has elapsed with a low voltage at the BATT terminal of the hybrid vehicle control ECU, the hybrid vehicle control ECU will determine that a malfunction has occurred in the back-up power supply system, and set a DTC. The MIL will illuminate the next time the engine is started.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR) P0343

NG -- CONNECT SECURELY
OK -- Continue to next step.

2. CHECK FUSE (IGCT)

(a) Remove the IGCT fuse from the engine room junction block assembly.

(b) Measure the resistance according to the value(s) in the table below.





Standard Resistance:





Text in Illustration





(c) Install the IGCT fuse.

NG -- REPLACE FUSE
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - IGCT FUSE)

(a) Remove the IGCT fuse from the engine room junction block assembly.

(b) Disconnect connector A58 from the hybrid vehicle control ECU.

(c) Measure the resistance according to the value(s) in the table below.





Text in Illustration





Standard Resistance (Check for Open):





Standard Resistance (Check for Short):





NOTICE:
When taking measurements with a tester, do not apply excessive force to the tester probes to avoid damaging the fuse holder or terminals.

(d) Install the IGCT fuse.

(e) Connect the hybrid vehicle control ECU connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (IGCT FUSE - BATTERY POSITIVE TERMINAL)

(a) Remove the IGCT fuse from the engine room junction block assembly.

(b) Disconnect the positive and negative terminals from the auxiliary battery.

(c) Measure the resistance according to the value(s) in the table below.





Standard Resistance (Check for Open):





Standard Resistance (Check for Short):





Text in Illustration





(d) Install the IGCT fuse.

(e) Connect the positive and negative terminals to the auxiliary battery.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

5. RECONFIRM DTC OUTPUT (HV)

HINT
If DTC P0560-117 is output after this inspection, replace the hybrid vehicle control ECU. If the DTC is not output, check for intermittent problems Check For Intermittent Problems because there may be a malfunction in the wire harness or connector.

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

(d) Recheck for DTCs.

Result:





B -- CHECK FOR INTERMITTENT PROBLEMS Check For Intermittent Problems

A -- REPLACE HYBRID VEHICLE CONTROL ECU Components