HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with P610): Drive Mode Select Switch Circuit; 2021 - 2022 MY Corolla Corolla HV [04/2020

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM100000001N40E
Model Year Start: 2021	Model: Corolla	Prod Date Range: [04/2020 - 09/2022]
Title: HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with P610): Drive Mode Select Switch Circuit; 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]

Drive Mode Select Switch Circuit

DESCRIPTION

When the drive mode select switch (combination switch assembly) is operated, a switch signal is sent to the hybrid vehicle control ECU and the hybrid vehicle control ECU changes the drive mode.

WIRING DIAGRAM

PROCEDURE

1.	READ VALUE USING TECHSTREAM (CAN BUS CHECK)

Click here

Result	Proceed to
All of the ECUs and sensors that are currently connected to the CAN communication system are displayed	A
None of the ECUs and sensors that are currently connected to the CAN communication system are displayed, or some of them are not displayed	B

GO TO CAN COMMUNICATION SYSTEM

2.	CHECK DTC OUTPUT (HEALTH CHECK)

Click here

Result	Proceed to
No DTCs are output	A
DTCs are output	B

GO TO DTC CHART

3.	CHECK DRIVE MODE STATUS

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

(b) Operate the drive mode select switch (combination switch assembly) to change the drive mode.

(c) Check that the drive mode indicator is displayed on the multi-information display and changes according to the selected drive mode.

Result	Proceed to
The display changes according to the drive mode select switch operation	A
The display does not change according to the drive mode select switch operation	B

(d) Turn the power switch off.

GO TO PROBLEM SYMPTOMS TABLE

4.	READ VALUE USING TECHSTREAM (POWERTRAIN DRIVE MODE SWITCH)

(a) Connect the Techstream to the DLC3.

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

(d) Enter the following menus: Powertrain / Hybrid Control / Data List / Powertrain Drive Mode Switch.

Powertrain > Hybrid Control > Data List

Tester Display
Powertrain Drive Mode Switch

(e) Read the value displayed on the Techstream.

Powertrain > Hybrid Control

Tester Display

Measurement Item

Range

Normal Condition

Powertrain Drive Mode Switch

Drive mode select switch condition

ON or OFF

Drive mode select switch being pushed and held: ON

Drive mode select switch not operated: OFF

Result	Proceed to
The display changes according to the drive mode select switch operation	A
Other than above	B

(f) Turn the power switch off.

CHECK METER / GAUGE SYSTEM

5.	INSPECT DRIVE MODE SELECT SWITCH (COMBINATION SWITCH ASSEMBLY)

Click here

REPLACE COMBINATION SWITCH ASSEMBLY

6.	CHECK HARNESS AND CONNECTOR (DRIVE MODE SELECT SWITCH (COMBINATION SWITCH ASSEMBLY) - BODY GROUND)

(a) Disconnect the I61 drive mode select switch (combination switch assembly) connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
I61-5 (E) - Body ground	Always	Below 1 Ω

*a	Front view of wire harness connector (to Drive Mode Select Switch (Combination Switch Assembly))

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.	CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - DRIVE MODE SELECT SWITCH (COMBINATION SWITCH ASSEMBLY))

(a) Disconnect the I3 hybrid vehicle control ECU connector.

(b) Disconnect the I61 drive mode select switch (combination switch assembly) connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
I3-37 (PDRV) - I61-6 (DRV)	Always	Below 1 Ω
I3-37 (PDRV) or I61-6 (DRV) - Body ground	Always	10 kΩ or higher

Front view of wire harness connector

(to Hybrid Vehicle Control ECU)

Front view of wire harness connector

(to Drive Mode Select Switch (Combination Switch Assembly))

(d) Reconnect the I61 drive mode select switch (combination switch assembly) connector.

(e) Reconnect the I3 hybrid vehicle control ECU connector.

REPLACE HYBRID VEHICLE CONTROL ECU

REPAIR OR REPLACE HARNESS OR CONNECTOR