Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM1000000012UHB
Model Year Start: 2018 Model: Camry Prod Date Range: [03/2017 - 06/2017]
Title: LIGHTING (INT): LIGHTING SYSTEM: Interior Light Circuit; 2018 MY Camry [03/2017 - 06/2017]

Interior Light Circuit

DESCRIPTION

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

  • Ignition Key Cylinder Light (Transponder Key Coil)*1
  • Map Light (Roof Console Box Sub-assembly)*2
  • Spot Light Assembly*2
  • Room Light Assembly*3
  • *1: w/o Smart Key System
  • *2: w/ Room Light (for LED Type)
  • *3: w/ Room Light (for Bulb Type)

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

  • *: w/ Smart Key System

HINT:

The DOME CUT relay supplies power to the interior lights. If all the lights that use power from the DOME CUT relay do not turn on, check the interior light auto cut circuit first.

Click here 2018 - 2024 MY Camry [03/2017 -        ]; LIGHTING (INT): LIGHTING SYSTEM: Interior Light Auto Cut Circuit

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

Illuminated Entry System

Turns on the lights that are controlled by the illuminated entry system*

OFF or ON

w/ Room Light (for LED Type):

Perform the Active Test with the door linked switch of the map light (roof console box sub-assembly) on and switches of the spot light assembly LH and RH off.

w/ Room Light (for Bulb Type):

Perform the Active Test with switch of the room light assembly in the DOOR position.
  • *: Refer to System Description for the lights that are controlled by the illuminated entry system.

    Click here 2018 MY Camry [03/2017 - 06/2017]; LIGHTING (INT): LIGHTING SYSTEM: SYSTEM DESCRIPTION

Body Electrical > Main Body > Active Test

Tester Display

Illuminated Entry System

OK:

All lights that are controlled by the illuminated entry system come on.

Result

Proceed to

OK

A

NG (Map light (roof console box sub-assembly) and/or spot light assembly do not come on (w/ Room Light (for LED Type)))

B

NG (Room light assembly does not come on (w/ Room Light (for Bulb Type)))

C

NG (Ignition key cylinder light (transponder key coil) does not come on)

D

NG (All lights that are controlled by the illuminated entry system do not come on)

E
A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

C

GO TO STEP 6

D

GO TO STEP 7

E

GO TO STEP 11

B

2.

INSPECT MAP LIGHT (ROOF CONSOLE BOX SUB-ASSEMBLY)

(a) Remove the map light (roof console box sub-assembly).

Click here 2018 MY Camry [03/2017 - 06/2017]; LIGHTING (INT): PERSONAL LIGHT: REMOVAL

(b) Inspect the map light (roof console box sub-assembly).

Click here 2018 MY Camry [03/2017 - 06/2017]; LIGHTING (INT): PERSONAL LIGHT: INSPECTION

NG

REPLACE MAP LIGHT (ROOF CONSOLE BOX SUB-ASSEMBLY)

OK

3.

INSPECT SPOT LIGHT ASSEMBLY

(a) Remove the spot light assembly.

Click here 2018 - 2024 MY Camry [03/2017 -        ]; LIGHTING (INT): ROOM LIGHT: REMOVAL

(b) Inspect the spot light assembly.

Click here 2018 - 2024 MY Camry [03/2017 -        ]; LIGHTING (INT): ROOM LIGHT: INSPECTION

NG

REPLACE SPOT LIGHT ASSEMBLY

OK

4.

CHECK HARNESS AND CONNECTOR (MAP LIGHT (ROOF CONSOLE BOX SUB-ASSEMBLY) - SPOT LIGHT ASSEMBLY)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

V14-14 (+B1) - V11-5 (B)

Always

Below 1 Ω

V14-2 (RLMP) - V11-2 (CTY)

Always

Below 1 Ω

V14-14 (+B1) or V11-5 (B) - Body ground

Always

10 kΩ or higher

V14-2 (RLMP) or V11-2 (CTY) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

5.

CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - MAP LIGHT (ROOF CONSOLE BOX SUB-ASSEMBLY))

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

(b) Connect the V14 map light (roof console box sub-assembly) connector.

(c) Apply battery voltage to the connector and check that the map light comes on.

OK:

Measurement Condition

Condition

Specified Condition

Battery positive (+) → 3B-10

Battery negative (-) → 3B-29

Door linked switch on and map light switch LH and RH off

Map light LH and RH come on
OK

GO TO STEP 11

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.

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

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

(b) Apply battery voltage to the connector and check that the room light comes on.

OK:

Measurement Condition

Condition

Specified Condition

Battery positive (+) → 3B-10

Battery negative (-) → 3B-29

Room light switch in DOOR position

Room light comes on
OK

GO TO STEP 11

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (INCLUDING BULB HOLDER OF THE ROOM LIGHT ASSEMBLY THAT ARE PART OF THE WIRE HARNESS)

7.

INSPECT IGNITION KEY CYLINDER LIGHT (TRANSPONDER KEY COIL)

(a) Remove the ignition key cylinder light (transponder key coil).

Click here 2018 - 2024 MY Camry [03/2017 -        ]; LIGHTING (INT): IGNITION KEY CYLINDER LIGHT: REMOVAL

(b) Inspect the ignition key cylinder light (transponder key coil).

Click here 2018 - 2024 MY Camry [03/2017 -        ]; LIGHTING (INT): IGNITION KEY CYLINDER LIGHT: INSPECTION

NG

REPLACE IGNITION KEY CYLINDER LIGHT (TRANSPONDER KEY COIL)

OK

8.

CHECK HARNESS AND CONNECTOR (BATTERY - 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

9.

INSPECT 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-24 - 3F-1

Always

Below 1 Ω
NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

OK

10.

CHECK HARNESS AND CONNECTOR (IGNITION KEY CYLINDER LIGHT (TRANSPONDER KEY COIL) - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

K61-2 (ILL+) - 3B-24

Always

Below 1 Ω

K61-4 (ILL-) - 3B-29

K61-2 (ILL+) or 3B-24 - Body ground

Always

10 kΩ or higher

K61-4 (ILL-) or 3B-29 - Body ground
OK

GO TO STEP 11

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

11.

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 MY Camry [03/2017 - 06/2017]; 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 MY Camry [03/2017 - 06/2017]; 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

3B-29 - MB-1 (ILE)

Always

Below 1 Ω
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY