Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001N40F
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): Indicator Circuit; 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]

Indicator Circuit

DESCRIPTION

In accordance with the shift lever position, each shift position indicator light will turn on.

WIRING DIAGRAM

PROCEDURE

1.

CHECK POSITION INDICATOR HOUSING ASSEMBLY (SHIFT POSITION INDICATOR)

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

(b) Check that each shift position indicator light turns on correctly.

Result

Proceed to

All shift position indicator lights turn on simultaneously

A

Shift position indicator lights other than corresponding one turn on

B

Corresponding shift position indicator light does not turn on

C

No shift position indicator lights turn on

D

(c) Turn the power switch off.

A

GO TO STEP 2

C

GO TO STEP 4

D

GO TO STEP 4

B

2.

CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT TO GND)

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I3-19 (INDP) - Body ground and other terminals

Always

10 kΩ or higher

I3-7 (INDR) - Body ground and other terminals

Always

10 kΩ or higher

I3-21 (INDN) - Body ground and other terminals

Always

10 kΩ or higher

I3-8 (INDD) - Body ground and other terminals

Always

10 kΩ or higher

I3-20 (INDB) - Body ground and other terminals

Always

10 kΩ or higher

*a

Front view of wire harness connector

(to Hybrid Vehicle Control ECU)

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

OK

REPLACE HYBRID VEHICLE CONTROL ECU

NG

3.

CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - SHIFT POSITION INDICATOR (POSITION INDICATOR HOUSING ASSEMBLY))

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

(b) Disconnect the I39 shift position indicator (position indicator housing assembly) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I3-19 (INDP) or I39-10 (P) - Body ground and other terminals

Always

10 kΩ or higher

I3-7 (INDR) or I39-9 (R) - Body ground and other terminals

Always

10 kΩ or higher

I3-21 (INDN) or I39-8 (N) - Body ground and other terminals

Always

10 kΩ or higher

I3-8 (INDD) or I39-7 (D) - Body ground and other terminals

Always

10 kΩ or higher

I3-20 (INDB) or I39-6 (B) - Body ground and other terminals

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 Shift Position Indicator (Position Indicator Housing Assembly))

(d) Reconnect the I39 shift position indicator (position indicator housing assembly) connector.

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

OK

REPLACE POSITION INDICATOR HOUSING ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.

CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

(a) Disconnect the I39 shift position indicator connector.

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

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

I39-1 (PWR) - Body ground

Power switch on (ACC)

11 to 14 V

*a

Front view of wire harness connector

(to Shift Position Indicator (Position Indicator Housing Assembly))

(d) Turn the power switch off.

(e) Reconnect the I39 shift position indicator connector.

NG

REPAIR OR REPLACE POWER SOURCE CIRCUIT
OK

5.

CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL ACCI)

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

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

*a

Component with harness connected

(Hybrid Vehicle Control ECU)

-

-

Standard Voltage:

Tester Connection

Condition

Specified Condition

I2-29 (ACCI) - Body ground

Power switch on (ACC)

11 to 14 V

(c) Turn the power switch off.

NG

REPAIR OR REPLACE POWER SOURCE CIRCUIT
OK

6.

CHECK HARNESS AND CONNECTOR (CHECK FOR OPEN)

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

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

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

I3-19 (INDP) - Body ground and other terminals

Power switch on (ACC)

11 to 14 V

I3-7 (INDR) - Body ground and other terminals

Power switch on (ACC)

11 to 14 V

I3-21 (INDN) - Body ground and other terminals

Power switch on (ACC)

11 to 14 V

I3-8 (INDD) - Body ground and other terminals

Power switch on (ACC)

11 to 14 V

I3-20 (INDB) - Body ground and other terminals

Power switch on (ACC)

11 to 14 V

*a

Front view of wire harness connector

(to Hybrid Vehicle Control ECU)

(d) Turn the power switch off.

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

OK

REPLACE HYBRID VEHICLE CONTROL ECU

NG

7.

CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - SHIFT POSITION INDICATOR (POSITION INDICATOR HOUSING ASSEMBLY))

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

(b) Disconnect the I39 shift position indicator connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I3-19 (INDP) - I39-10 (P)

Always

Below 1 Ω

I3-7 (INDR) - I39-9 (R)

Always

Below 1 Ω

I3-21 (INDN) - I39-8 (N)

Always

Below 1 Ω

I3-8 (INDD) - I39-7 (D)

Always

Below 1 Ω

I3-20 (INDB) - I39-6 (B)

Always

Below 1 Ω

*a

Front view of wire harness connector

(to Hybrid Vehicle Control ECU)

*b

Front view of wire harness connector

(to Shift Position Indicator (Position Indicator Housing Assembly))

(d) Reconnect the I39 shift position indicator connector.

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

OK

REPLACE POSITION INDICATOR HOUSING ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR