Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001GCRJ
Model Year Start: 2020 Model: Corolla Prod Date Range: [01/2019 - 09/2022]
Title: HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): Drive Mode Select Switch Circuit; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 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)

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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
B

GO TO CAN COMMUNICATION SYSTEM

A

2.

CHECK DTC OUTPUT (HEALTH CHECK)

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Result

Proceed to

No DTCs are output

A

DTCs are output

B
B

GO TO DTC CHART
A

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.

A

GO TO PROBLEM SYMPTOMS TABLE

B

4.

READ VALUE USING TECHSTREAM (POWERTRAIN DRIVE MODE SWITCH)

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(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.

A

CHECK METER / GAUGE SYSTEM

B

5.

INSPECT DRIVE MODE SELECT SWITCH (COMBINATION SWITCH ASSEMBLY)

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NG

REPLACE COMBINATION SWITCH ASSEMBLY

OK

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))

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

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

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.

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

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

*a

Front view of wire harness connector

(to Hybrid Vehicle Control ECU)

*b

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.

OK

REPLACE HYBRID VEHICLE CONTROL ECU 2020 MY Corolla Corolla HV [01/2019 - 04/2020]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR