Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM1000000014V5W
Model Year Start: 2018 Model: Camry Prod Date Range: [06/2017 -           ]
Title: LIGHTING (INT): LIGHTING SYSTEM: Footwell Light Circuit; 2018 - 2024 MY Camry [06/2017 -        ]

Footwell Light Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the operation of the following lights:

  • Footwell Light LH (No. 1 Interior Illumination Light Assembly)
  • Footwell Light RH (No. 1 Interior Illumination Light Assembly)

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • Before replacing the main body ECU (multiplex network body ECU), refer to Registration.*

    Click here 2018 - 2019 MY Camry [03/2017 - 09/2019]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): REGISTRATION 2020 - 2022 MY Camry [09/2019 - 08/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): REGISTRATION 2023 - 2024 MY Camry [08/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): REGISTRATION

  • *: w/ Smart Key System

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Main Body > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Fr Foot Light

Footwell light (No. 1 interior illumination light assembly)

OFF or ON

Preconditions for using the Active Test to check dimmer controlled illumination:

  • Ignition switch ON
  • Shift lever is in any position other than P

Body Electrical > Main Body > Active Test

Tester Display

Fr Foot Light

OK:

Footwell lights come on.

Result

Proceed to

OK

A

NG (Footwell light LH does not come on)

B

NG (Footwell light RH does not come on)

C

NG (Footwell light LH and RH do not come on)

D

A

USE SIMULATION METHOD TO CHECK 2018 MY Camry [06/2017 - 08/2018]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING 2019 MY Camry [08/2018 - 09/2019]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING 2020 MY Camry [09/2019 - 03/2020]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING 2020 MY Camry [03/2020 - 10/2020]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING 2021 MY Camry [10/2020 - 08/2021]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING 2022 - 2024 MY Camry [08/2021 -        ]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING

C

GO TO STEP 6

D

GO TO STEP 10

B

2.

INSPECT FOOTWELL LIGHT LH (NO. 1 INTERIOR ILLUMINATION LIGHT ASSEMBLY)

(a) Remove the footwell light LH (No. 1 interior illumination light assembly).

Click here 2018 - 2024 MY Camry [06/2017 -        ]; LIGHTING (INT): FOOTWELL LIGHT: REMOVAL

(b) Inspect the footwell light LH (No. 1 interior illumination light assembly).

Click here 2018 - 2024 MY Camry [06/2017 -        ]; LIGHTING (INT): FOOTWELL LIGHT: INSPECTION

NG

REPLACE FOOTWELL LIGHT LH (NO. 1 INTERIOR ILLUMINATION LIGHT ASSEMBLY)

OK

3.

CHECK HARNESS AND CONNECTOR (FOOTWELL LIGHT LH (NO. 1 INTERIOR ILLUMINATION LIGHT ASSEMBLY) - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

(a) Disconnect the 3A and 3B instrument panel junction block assembly connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

K84-1 (E) - 3A-36

Always

Below 1 Ω

K84-2 (B) - 3B-27

Always

Below 1 Ω

K84-1 (E) or 3A-36 - Body ground

Always

10 kΩ or higher

K84-2 (B) or 3B-27 - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

*a

Component without harness connected

(Instrument Panel Junction Block Assembly)

-

-

(a) Disconnect the 3F instrument panel junction block assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3B-27 - 3F-1

Always

Below 1 Ω

NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 2018 - 2020 MY Camry [06/2017 - 10/2020]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2021 - 2024 MY Camry [10/2020 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

OK

5.

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

*a

Component without harness connected

(Instrument Panel Junction Block Assembly)

-

-

(a) Remove the instrument panel junction block assembly.

Click here 2018 - 2020 MY Camry [06/2017 - 10/2020]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2021 - 2024 MY Camry [10/2020 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

(b) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

Click here 2018 - 2020 MY Camry [06/2017 - 10/2020]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2021 - 2024 MY Camry [10/2020 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3A-36 - MB-26 (FSPT)

Always

Below 1 Ω

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 2018 - 2020 MY Camry [06/2017 - 10/2020]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2021 - 2024 MY Camry [10/2020 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 2018 - 2020 MY Camry [06/2017 - 10/2020]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2021 - 2024 MY Camry [10/2020 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

6.

INSPECT FOOTWELL LIGHT RH (NO. 1 INTERIOR ILLUMINATION LIGHT ASSEMBLY)

(a) Remove the footwell light RH (No. 1 interior illumination light assembly).

Click here 2018 - 2024 MY Camry [06/2017 -        ]; LIGHTING (INT): FOOTWELL LIGHT: REMOVAL

(b) Inspect the footwell light RH (No. 1 interior illumination light assembly).

Click here 2018 - 2024 MY Camry [06/2017 -        ]; LIGHTING (INT): FOOTWELL LIGHT: INSPECTION

NG

REPLACE FOOTWELL LIGHT RH (NO. 1 INTERIOR ILLUMINATION LIGHT ASSEMBLY)

OK

7.

CHECK HARNESS AND CONNECTOR (FOOTWELL LIGHT RH (NO. 1 INTERIOR ILLUMINATION LIGHT ASSEMBLY) - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

(a) Disconnect the 3A and 3B instrument panel junction block assembly connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

K83-1 (E) - 3A-37

Always

Below 1 Ω

K83-2 (B) - 3B-25

Always

Below 1 Ω

K83-1 (E) or 3A-37 - Body ground

Always

10 kΩ or higher

K83-2 (B) or 3B-25 - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

8.

CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

*a

Component without harness connected

(Instrument Panel Junction Block Assembly)

-

-

(a) Disconnect the 3F instrument panel junction block assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3B-25 - 3F-1

Always

Below 1 Ω

NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 2018 - 2020 MY Camry [06/2017 - 10/2020]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2021 - 2024 MY Camry [10/2020 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

OK

9.

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

*a

Component without harness connected

(Instrument Panel Junction Block Assembly)

-

-

(a) Remove the instrument panel junction block assembly.

Click here 2018 - 2020 MY Camry [06/2017 - 10/2020]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2021 - 2024 MY Camry [10/2020 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

(b) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

Click here 2018 - 2020 MY Camry [06/2017 - 10/2020]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2021 - 2024 MY Camry [10/2020 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3A-37 - MB-26 (FSPT)

Always

Below 1 Ω

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 2018 - 2020 MY Camry [06/2017 - 10/2020]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2021 - 2024 MY Camry [10/2020 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 2018 - 2020 MY Camry [06/2017 - 10/2020]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2021 - 2024 MY Camry [10/2020 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

10.

CHECK HARNESS AND CONNECTOR (POWER SOURCE - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

(a) Disconnect the 3F instrument panel junction block assembly connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

3F-1 - Body ground

Always

11 to 14 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

11.

CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

*a

Component without harness connected

(Instrument Panel Junction Block Assembly)

-

-

(a) Disconnect the 3B instrument panel junction block assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3B-27 - 3F-1

Always

Below 1 Ω

3B-25 - 3F-1

Always

Below 1 Ω

NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 2018 - 2020 MY Camry [06/2017 - 10/2020]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2021 - 2024 MY Camry [10/2020 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

OK

12.

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

*a

Component without harness connected

(Instrument Panel Junction Block Assembly)

-

-

(a) Remove the instrument panel junction block assembly.

Click here 2018 - 2020 MY Camry [06/2017 - 10/2020]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2021 - 2024 MY Camry [10/2020 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

(b) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

Click here 2018 - 2020 MY Camry [06/2017 - 10/2020]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2021 - 2024 MY Camry [10/2020 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3A-36 - MB-26 (FSPT)

Always

Below 1 Ω

3A-37 - MB-26 (FSPT)

Always

Below 1 Ω

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 2018 - 2020 MY Camry [06/2017 - 10/2020]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2021 - 2024 MY Camry [10/2020 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 2018 - 2020 MY Camry [06/2017 - 10/2020]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2021 - 2024 MY Camry [10/2020 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL