Toyota Tundra. Manual — part 2477

2. ACTIVE TEST

HINT:

Using the Techstream to perform ACTIVE TESTs allows relays, VSVs, actuators and other items to be
operated without removing any parts. This non-intrusive functional inspection can be very useful because
intermittent operation may be discovered before parts or wiring is disturbed. Performing ACTIVE TESTs
early in troubleshooting is one way to save diagnostic time. DATA LIST information can be displayed
while performing ACTIVE TESTs.

D Dor Cty

SW

Front door courtesy light switch
LH signal / ON or OFF

ON: Front door courtesy
light switch LH ON
OFF: Front door courtesy
light switch LH OFF

-

P Dor Cty SW

Front door courtesy light switch
RH signal / ON or OFF

ON: Front door courtesy
light switch RH ON
OFF: Front door courtesy
light switch RH OFF

-

RL Dor Cty

SW

Rear door courtesy light switch
LH signal / ON or OFF

ON: Rear door courtesy
light switch LH ON
OFF: Rear door courtesy
light switch LH OFF

-

RR Dor Cty

SW

Rear door courtesy light switch
RH signal / ON or OFF

ON: Rear door courtesy
light switch RH ON
OFF: Rear door courtesy
light switch RH OFF

-

Cargo Light

Cargo light switch signal / ON or
OFF

ON: Cargo light ON
OFF: Cargo light OFF

-

Dimmer SW

Dimmer switch signal / ON or
OFF

ON: Dimmer switch ON
OFF: Dimmer switch OFF

-

High Flasher

SW

Passing light switch signal / ON
or OFF

ON: Passing light switch
ON
OFF: Passing light switch
OFF

-

F Fog Light

SW

Front fog light switch signal / ON
or OFF

ON: Front fog light switch
ON
OFF: Front fog light switch
OFF

-

Auto Light

SW

Auto light switch signal / ON or
OFF

ON: Auto light switch ON
OFF: Auto light switch OFF

-

Head Light

SW

Headlight switch signal / ON or
OFF

ON: Headlight switch ON
OFF: Headlight switch OFF

-

Tail Light SW

Taillight switch signal / ON or
OFF

ON: Taillight switch ON
OFF: Taillight switch OFF

-

Illumination

Rate

Illumination rate / min.: 0, max.:
99.99

Actual illumination rate is
displayed

-

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Lighting - Tundra

a. Connect the Techstream to the DLC3.

b. Turn the ignition switch ON.

c. Turn the tester on.

d. Enter the following menus:

1. Techstream - Select: Body / Main Body / Active Test.

e. According to the display on tester, perform the "ACTIVE TEST".

Techstream

Main Body

MAIN BODY - ACTIVE TEST CHART

DIAGNOSTIC TROUBLE CODE CHART

HINT:

If a trouble code is displayed during the DTC check, inspect the trouble areas listed for that code.

Lighting system

LIGHTING SYSTEM

DTC B1244 LIGHT SENSOR CIRCUIT MALFUNCTION

DESCRIPTION

This DTC is output when a failure of the automatic light control sensor circuit is detected.

DTC TROUBLE DETECTION CONDITION CHART

Tester Display

Test Part

Control Range

Diagnostic Note

Illumi Output Illumination light

ON or OFF

-

Tail Light

Taillight

ON or OFF

-

Head Light

Headlight

ON or OFF

-

Head Light (Hi) Headlight (High)

ON or OFF

-

F Fog Light Rly Front fog light

ON or OFF

-

Cargo Lgt

Cargo light

ON or OFF

Cargo light switch is DOOR or ON

DTC Code

Detection Item

Trouble Area

B1244

Light Sensor Circuit Malfunction



Automatic light control
sensor



Harness or connector



Main body ECU

DTC Code

DTC Detection Condition

Trouble Area

When either condition below is met:

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Lighting - Tundra

WIRING DIAGRAM

Fig. 16: Automatic Light Control Sensor - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. CHECK FOR DTC

a. Clear the DTC (see DTC CHECK / CLEAR ).

b. Recheck for DTC (see DTC CHECK / CLEAR ).

OK: DTC B1244 is not output.

NG: Go to step 2

OK: USE SIMULATION METHOD TO CHECK (See HOW TO PROCEED WITH
TROUBLESHOOTING )

2. READ VALUE OF TECHSTREAM (AUTOMATIC LIGHT CONTROL SENSOR)

a. Operate the Techstream according to the display and select "DATA LIST" or "Data List".

Techstream

Main Body

MAIN BODY - TECHSTREAM DATA LIST CHART

B1244



Malfunction of light sensor



Open or short of light sensor circuit



Automatic light control sensor



Harness or connector



Main body ECU

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic

Note

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Lighting - Tundra

OK: Output illuminance is as shown in table above.

NG: Go to step 3

OK: REPLACE MAIN BODY ECU

3. CHECK MAIN BODY ECU (LIGHT CONTROL SENSOR VOLTAGE)

a. Disconnect the J3 ECU connector.

Fig. 17: Identifying Main Body ECU Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

Standard voltage

MAIN BODY ECU (LIGHT CONTROL SENSOR VOLTAGE)

NG: REPLACE MAIN BODY ECU

OK: Go to next step

4. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - AUTOMATIC LIGHT

CONTROL SENSOR)

a. Disconnect the J3 ECU connector.

b. Disconnect the K19 sensor connector.

Illumination

Rate

Illumination rate / min.: 0,
max.: 99.99

Actual illumination rate is
displayed

-

Tester Connection

Switch Condition Specified Condition

J3-20 (CLTB) - J3-18 (CLTE)

Ignition switch ON

11 to 14 V

Ignition switch OFF

Below 1 V

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Lighting - Tundra