Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001GL9J
Model Year Start: 2020 Model: GR Corolla Prod Date Range: [01/2019 - 11/2022]
Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model with Dual Knob Type): Reverse Signal Circuit; 2020 - 2023 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 11/2022]

Reverse Signal Circuit

DESCRIPTION

for M/T

  • The radio and display receiver assembly receives a reverse signal from the park/neutral position switch assembly.

for CVT

  • The radio and display receiver assembly receives a reverse signal from the back-up light switch assembly.

WIRING DIAGRAM

PROCEDURE

1.

CHECK BACK-UP LIGHT

(a) Move the shift lever to R and check if the back-up lights come on.

OK:

The back-up lights come on.

NG

GO TO LIGHTING SYSTEM

w/ AFS: Click here 2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022]; LIGHTING (EXT): LIGHTING SYSTEM (for Gasoline Model with AFS): HOW TO PROCEED WITH TROUBLESHOOTING 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; LIGHTING (EXT): LIGHTING SYSTEM (for TMMMS Made): HOW TO PROCEED WITH TROUBLESHOOTING

w/o AFS: Click here 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]; LIGHTING (EXT): LIGHTING SYSTEM (for Gasoline Model without AFS): HOW TO PROCEED WITH TROUBLESHOOTING 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; LIGHTING (EXT): LIGHTING SYSTEM (for TMMMS Made): HOW TO PROCEED WITH TROUBLESHOOTING

OK

2.

CHECK HARNESS AND CONNECTOR (REVERSE SIGNAL)

(a) Disconnect the I55 radio and display receiver assembly connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

I55-28 (REV) - Body ground

Ignition switch ON

Shift lever in R

11 to 14 V

I55-28 (REV) - Body ground

Ignition switch ON

Shift lever not in R

Below 1 V

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2019]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model with Dual Knob Type): PROBLEM SYMPTOMS TABLE 2020 MY Corolla Corolla Hatchback GR Corolla [09/2019 - 04/2020]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model with Dual Knob Type): PROBLEM SYMPTOMS TABLE 2021 - 2023 MY Corolla Corolla Hatchback GR Corolla [04/2020 - 11/2022]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model with Dual Knob Type): PROBLEM SYMPTOMS TABLE

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR