Lighting System Light Control Switch Circuit

Body Electrical. Camry. Acv40 Gsv40
Lighting. Camry. Acv40 Gsv40

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING INTELLIGENT TESTER

INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY

CHECK VEHICLE CONDITION

CHECK HARNESS AND CONNECTOR (SWITCH - INSTRUMENT PANEL J/B AND BODY GROUND)

CHECK HARNESS AND CONNECTOR (SWITCH - INSTRUMENT PANEL J/B AND BODY GROUND)

LIGHTING SYSTEM - Light Control Switch Circuit


DESCRIPTION

The main body ECU receives the following switch information.
  1. Light control switch position is OFF, TAIL, HEAD, or AUTO
  2. Dimmer switch position is HIGH, LOW, or HIGH FLASH (PASS)
  3. Fog light switch position is OFF, FRONT, or REAR

WIRING DIAGRAM


Camry. Acv40 Gsv40.Lighting.Lighting System.Lighting System Light Control Switch Circuit


INSPECTION PROCEDURE

1.READ VALUE USING INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to the ON position and turn the intelligent tester main switch on.

  1. Select the items below in the DATA LIST, and read the displays on the intelligent tester.

    Main Body (Main Body ECU):
    Item
    		Measurement/
    Display (Range)
    		Normal Condition
    		Diagnostic Note
    Dimmer Hi SW
    		Dimmer switch HIGH signal / ON or OFF
    		ON: Dimmer switch in HIGH
    OFF: Dimmer switch in LOW
    		-
    Passing Light SW
    		Dimmer switch FLASH signal / ON or OFF
    		ON: Dimmer switch in HIGH FLASH (PASS)
    OFF: Dimmer switch not in HIGH FLASH (PASS)
    		-
    Front Fog Light SW
    		Front fog light switch signal / ON or OFF
    		ON: Front fog light switch ON
    OFF: Front fog light switch OFF
    		-
    Rear Fog Light SW
    		Rear fog light switch signal / ON or OFF
    		ON: Rear fog light switch ON
    OFF: Rear fog light switch OFF
    		-
    Light Auto SW
    		Light control switch AUTO signal / ON or OFF
    		ON: Light control switch in AUTO
    OFF: Light control switch not in AUTO
    		-
    Headlight SW
    		Light control switch HEAD signal / ON or OFF
    		ON: Light control switch in HEAD
    OFF: Light control switch not in HEAD
    		-
    Taillight SW
    		Light control switch TAIL signal / ON or OFF
    		ON: Light control switch in TAIL or HEAD
    OFF: Light control switch in neither TAIL nor HEAD
    		-
    OK:
    Normal conditions listed above are displayed.


OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
NG


2.INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY

  1. Inspect the headlight dimmer switch assembly (CAMRY_ACV40 RM0000014E3006X.html).



NG
REPLACE HEADLIGHT DIMMER SWITCH ASSEMBLY
OK


3.CHECK VEHICLE CONDITION

Result:

Vehicle Condition
Proceed to
LHD
A
RHD
B


B
Go to step 5
A


4.CHECK HARNESS AND CONNECTOR (SWITCH - INSTRUMENT PANEL J/B AND BODY GROUND)


    Camry. Acv40 Gsv40.Lighting.Lighting System.Lighting System Light Control Switch Circuit

  1. Disconnect the E21 headlight dimmer switch assembly connector.

  1. Disconnect the E6 and E7 main body ECU connectors.

  1. Disconnect the IG instrument panel J/B connector.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E21-2 (B) - E6-9 (RFOG)
    		Always
    		Below 1 Ω
    E21-4 (BFG) - E6-28 (FFOG)
    		Always
    		Below 1 Ω
    E21-11 (HU) - IG-5 (HU)
    		Always
    		Below 1 Ω
    E21-17 (HF) - E7-13 (HF)
    		Always
    		Below 1 Ω
    E21-18 (T) - E7-23 (TAIL)
    		Always
    		Below 1 Ω
    E21-19 (A) - E7-21 (A)
    		Always
    		Below 1 Ω
    E21-20 (H) - E6-17 (HEAD)
    		Always
    		Below 1 Ω
    E21-2 (B) - Body ground
    		Always
    		10 kΩ higher
    E21-3 (LFG) - Body ground
    		Always
    		10 kΩ higher
    E21-4 (BFG) - Body ground
    		Always
    		10 kΩ higher
    E21-11 (HU) - Body ground
    		Always
    		10 kΩ higher
    E21-17 (HF) - Body ground
    		Always
    		10 kΩ higher
    E21-18 (T) - Body ground
    		Always
    		10 kΩ higher
    E21-19 (A) - Body ground
    		Always
    		10 kΩ higher
    E21-20 (H) - Body ground
    		Always
    		10 kΩ higher
    E21-12 (EL) - Body ground
    		Always
    		Below 1 Ω
    E21-3 (LFG) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

5.CHECK HARNESS AND CONNECTOR (SWITCH - INSTRUMENT PANEL J/B AND BODY GROUND)


    Camry. Acv40 Gsv40.Lighting.Lighting System.Lighting System Light Control Switch Circuit

  1. Disconnect the E21 headlight dimmer switch assembly connector.

  1. Disconnect the E6 and E7 main body ECU connectors.

  1. Disconnect the IG instrument panel J/B connector.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E21-3 (T) - E7-23 (TAIL)
    		Always
    		Below 1 Ω
    E21-7 (BFG) - E6-28 (FFOG)
    		Always
    		Below 1 Ω
    E21-9 (B) - E6-9 (RFOG)
    		Always
    		Below 1 Ω
    E21-11 (H) - E6-17 (HEAD)
    		Always
    		Below 1 Ω
    E21-12 (A) - E7-21 (A)
    		Always
    		Below 1 Ω
    E21-14 (HF) - E7-13 (HF)
    		Always
    		Below 1 Ω
    E21-20 (HU) - IG-5 (HU)
    		Always
    		Below 1 Ω
    E21-3 (T) - Body ground
    		Always
    		10 kΩ higher
    E21-7 (BFG) - Body ground
    		Always
    		10 kΩ higher
    E21-9 (B) - Body ground
    		Always
    		10 kΩ higher
    E21-11 (H) - Body ground
    		Always
    		10 kΩ higher
    E21-12 (A) - Body ground
    		Always
    		10 kΩ higher
    E21-14 (HF) - Body ground
    		Always
    		10 kΩ higher
    E21-20 (HU) - Body ground
    		Always
    		10 kΩ higher
    E21-19 (EL) - Body ground
    		Always
    		Below 1 Ω
    E21-8 (LFG) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY