Toyota Tundra. Manual — part 2403

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

4. CHECK AUTOMATIC LIGHT CONTROL SENSOR (SOLAR SENSOR (TSL - CLTE

VOLTAGE))

a. Remove the solar sensor with its connector still connected (see REMOVAL ).

Fig. 56: Identifying Terminals Of Solar Sensor Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b. Apply battery voltage between terminals 6 (CLTB) and 3 (CLTE) of the solar sensor.

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

Standard Voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

HINT:

Tester Connection

Condition Specified Condition

J19-33 (TSD) - K19-1 (TSL)

Always

Below 1 ohms

J19-33 (TSD) or K19-1 (TSL) - Body ground Always

10 kohms or higher

Tester Connection

Condition

Specified Condition

1 (TSL) - 3 (CLTE)

Sensor is subjected to electric light

0.8 to 4.3 V

Sensor is covered with a cloth

Below 0.8 V

2009 Toyota Tundra

2009 HVAC Air Conditioning - Tundra



As the inspection light is moved away from the sensor, the voltage decreases.



Use an incandescent light for inspection. Bring it about 30 cm (11.8 in.) from the solar
sensor.

NG: REPLACE AUTOMATIC LIGHT CONTROL SENSOR (SOLAR SENSOR) (See
REMOVAL )

OK: REPLACE AIR CONDITIONING AMPLIFIER (See REMOVAL )

5. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - SOLAR SENSOR AND BODY

GROUND)

a. Disconnect the J3 ECU connector.

b. Disconnect the K19 solar sensor connector.

Fig. 57: Identifying Terminals Of J3 ECU And K19 Solar Sensor Connectors
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection

Condition Specified Condition

J3-18 (CLTE) - K19-3 (CLTE)

Always

Below 1 ohms

J3-20 (CLTB) - K19-6 (CLTB)

J3-18 (CLTE) or K19-3 (CLTE) - Body ground

2009 Toyota Tundra

2009 HVAC Air Conditioning - Tundra

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE MAIN BODY ECU

DTC B1441/41 AIR MIX DAMPER CONTROL SERVO MOTOR CIRCUIT (PASSENGER SIDE)

DESCRIPTION

The air mix damper servo motor (for passenger side) sends pulse signals to inform the air conditioning amplifier
of the damper position. The air conditioning amplifier activates the motor (normal, reverse) based on the signals
to move the air mix damper (for passenger side) to any position. As a result the amount of air that has passed
through the evaporator and is now passing through the heater core is adjusted, and the temperature of the air
blowing toward the passenger side is controlled.

DTC DETECTION CONDITION CHART

WIRING DIAGRAM

Fig. 58: Air Mix Damper Control Servo Motor - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

J3-20 (CLTB) or K19-6 (CLTB) - Body ground Always

10 kohms or higher

DTC

DTC Detection Condition

Trouble Area

B1441/41

Air mix damper position sensor
value does not change even if air
conditioning amplifier operates air
mix servo motor



Air mix servo motor (for
passenger side)



Air conditioning harness



Air conditioning amplifier

2009 Toyota Tundra

2009 HVAC Air Conditioning - Tundra

1. READ VALUE USING TECHSTREAM (AIR MIX SERVO MOTOR TARGET PULSE (for

Passenger Side))

a. Use the Data List to check if the servo motor is functioning properly.

Air Conditioner

DATA LIST

OK:

The display is as specified in the normal condition.

Result

RESULT REFERENCE

B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS
TABLE (See PROBLEM SYMPTOMS TABLE )

C: REPLACE AIR CONDITIONING AMPLIFIER (See REMOVAL )

A: Go to Next Step

2. REPLACE AIR MIX SERVO MOTOR (for Passenger Side)

a. Temporarily replace the air mix servo motor with a new one (see DISASSEMBLY ).

HINT:

Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo
motor with a new one and check that the condition returns to normal.

3. CHECK FOR DTC

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

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

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic

Note

Air Mix Servo Targ

Pulse (P)

Passenger side air mix servo motor
target pulse/Min.: 6
Max.: 105

MAX. COLD: 105
(pulse)
MAX. HOT: 6
(pulse)

-

Result

Proceed to

NG

A

OK (Checking from the PROBLEM SYMPTOMS TABLE)

B

OK (Checking from the DTC)

C

2009 Toyota Tundra

2009 HVAC Air Conditioning - Tundra