EV Drive Mode Switch Circuit

P313 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: EV Drive Mode Switch Circuit
- EV Drive Mode Switch Circuit

DESCRIPTION

If pattern select switch (EV mode switch) signals are input to the hybrid vehicle control ECU, the ECU sends signals to the combination meter assembly via CAN communication to turn on the EV mode light.

If any of the following conditions are not met, EV mode may not be turned on or the mode may be canceled. (A buzzer sounds to indicate that the transition to EV mode is canceled and a message is displayed on the multi-information display.)





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. ASK ABOUT VEHICLE CONDITION

(a) Ask the customer if a buzzer sounded to indicate that the transition to EV mode was canceled and a message was displayed on the multi-information display when they pressed the pattern select switch assembly (EV mode switch).

Result:





HINT
If a buzzer sounds and a message is displayed on the multi-information display, one or more of the EV mode entry conditions have not been met. Check that all of the EV mode entry conditions have been met before pressing the pattern select switch assembly (EV mode switch).

B -- COMPLETED
A -- Continue to next step.

2. READ VALUE USING TECHSTREAM (CAN BUS CHECK)

HINT
ECUs that are correctly connected to the CAN communication system can be displayed on the Techstream.

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Enter the following menus: System Select / CAN Bus Check.

Result:





C -- GO TO CAN COMMUNICATION SYSTEM How to Proceed With Troubleshooting

B -- GO TO CAN COMMUNICATION SYSTEM How to Proceed With Troubleshooting
A -- Continue to next step.

3. CHECK DTC OUTPUT (ALL DTC CODE)

(a) Check for DTCs of all systems by following the prompts on the Techstream screen.

Result:





B -- GO TO DTC CHART
A -- Continue to next step.

4. PERFORM ACTIVE TEST USING TECHSTREAM (COMBINATION METER)

(a) Enter the following menus: Body Electrical / Combination Meter / Active Test / Indicat. EV Mode.

(b) Perform the "Indicat. EV Mode" Active Test.

OK:





Result:





B -- GO TO METER SYSTEM How To Proceed With Troubleshooting
A -- Continue to next step.

5. CHECK PATTERN SELECT SWITCH ASSEMBLY (EV MODE SWITCH)

(a) Turn the ignition switch off.

(b) Disconnect the pattern select switch assembly (EV mode switch) connector.

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





Standard Resistance:





Text in Illustration





NG -- REPLACE PATTERN SELECT SWITCH ASSEMBLY (EV MODE SWITCH)
OK -- Continue to next step.

6. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - BODY GROUND)

(a) Connect the pattern select switch assembly (EV mode switch) connector.

(b) Disconnect connector D72 from the hybrid vehicle control ECU.

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





Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE HYBRID VEHICLE CONTROL ECU Removal