Toyota Tundra. Manual — part 2419

a. Warm up the engine.

b. Turn the ignition switch OFF.

c. Connect the Techstream to the DLC3.

d. Turn the ignition switch ON.

e. Turn the Techstream on.

f. Enter the following menus: Body Electrical/(desired menu)/Data List.

g. According to the display on tester, read the "Data List".

Air Conditioner

DATA LIST

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Ambient Temp

Sensor

Ambient temperature sensor/Min.:
-23.3°C (-9.94°F)
Max.: 65.95°C (150.71°F)

Actual ambient
temperature is displayed

Open in circuit: -
23.3°C (-9.94°F)
Short in circuit:
65.95°C
(150.71°F)

Evaporator Fin

Thermistor

Evaporator fin thermistor/Min.:-
29.7°C (-21.46°F)
Max.: 59.55°C (139.19°F)

Actual evaporator
temperature is displayed

Open in circuit: -
29.7°C (-21.46°
F)
Short in circuit:
59.55°C
(139.19°F)

Engine Coolant

Temp

Engine coolant temperature/Min.:
1.3°C (34.34°F)
Max.: 90.55°C (194.99°F)

Actual engine coolant
temperature is displayed
while engine is warmed up

-

Adjusted

Ambient

Temperature

Adjusted ambient
temperature/Min.: -30.8°C (-23.44°
F)
Max.: 50.8°C (123.44°F)

Adjusted ambient
temperature is displayed

-

Air Mix Servo

Targ Pulse (D)

Driver side air mix servo motor
target pulse/Min.: 5, Max.: 104

MAX. COLD: 5 (pulse)
MAX. HOT: 104 (pulse)

-

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)

-

Air Outlet Servo

Pulse (D)

Driver side air outlet servo motor
target pulse/Min.: 9, Max.: 97

FACE: 9 (pulse)
MID: 25 (pulse)
B/L: 32 (pulse)
MID: 39 (pulse)
FOOT: 56 (pulse)
MID: 77 (pulse)
FOOT/DEF: 83 (pulse)
MID: 91 (pulse)
DEF: 97 (pulse)

-

Air Inlet Damper Air inlet damper target pulse/Min.: REC: 7

-

2009 Toyota Tundra

2009 HVAC Air Conditioning - Tundra

Engine and ECT

DATA LIST

2. PERFORM ACTIVE TEST

HINT:

Using the Techstream to perform the Active Tests allows relays, VSVs and 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.

a. Connect the Techstream to the DLC3.

b. Turn the ignition switch ON.

c. Turn the Techstream on.

d. Enter the following menus: Body Electrical/Air Conditioner/Active Test.

e. According to the display on the Techstream, perform the "Active Test".

Air Conditioner

ACTIVE TEST REFERENCE

Targ Pulse

7, Max.: 28

FRS: 28

Ambient

Temperature

Shift

Ambient temperature shift/+3 C,
+2 C, +1 C, Normal, -1 C, -2 C, -3
C

Customized value will be
displayed

-

Destination

Destination/DOMEST, USA,
EUROPE, AUSTRAL, MIDEAST,
NO INFO

Changes value with
destinations

-

Number of

Trouble Codes

Number of trouble codes/Min.: 0,
Max.: 255

Number of DTCs will be
displayed

-

Tester

Display

Measurement Item/Range

Normal Condition

Diagnostic

Note

A/C Signal

Air conditioning switch signal/ON or

OFF

ON: Air conditioning ON
OFF: Air conditioning
OFF

-

Tester Display

Test Part

Control Range

Diagnostic

Note

Magnetic Clutch Relay

Magnetic clutch relay

ON or OFF

-

Air Mix Servo Targ Pulse

(D)

Driver side air mix servo motor

pulse

Min.: 5, Max.:

104

-

Air Mix Servo Targ Pulse

(P)

Passenger side air mix servo motor

pulse

Min.: 6, Max.:

105

-

2009 Toyota Tundra

2009 HVAC Air Conditioning - Tundra

DIAGNOSTIC TROUBLE CODE CHART

HINT:

If a trouble code is displayed during the DTC check, inspect the trouble areas listed for that code. For details of
the code, refer to the links below.

Air conditioning system

DIAGNOSTIC TROUBLE CODE CHART

Air Outlet Servo Pulse (D)

Driver side air outlet servo motor

pulse

Min.: 9, Max.:

97

-

Air Inlet Damper Targ

Pulse

Air inlet damper target pulse

Min.: 7, Max.:

28

-

DTC

Detection Item

Trouble Area

B1412/12

Ambient Temperature Sensor
Circuit



Ambient temperature sensor



Harness or connector
between ambient temperature
sensor and air conditioning
amplifier



Air conditioning amplifier

B1413/13

Evaporator Temperature Sensor
Circuit



No. 1 cooler thermistor
(evaporator temperature
sensor)



Air conditioning harness



Air conditioning amplifier

B1422/22

Compressor Lock Sensor Circuit



Air conditioning compressor
(lock sensor)



Compressor drive belt



Harness and connector
between air conditioning
compressor (lock sensor) and
air conditioning amplifier



Air conditioning amplifier



CAN communication system

B1423/23

Pressure Sensor Circuit



Air conditioning pressure
switch



Harness and connector



Air conditioning amplifier

Air Mix Damper Control Servo



Air mix servo motor (for
passenger side)

2009 Toyota Tundra

2009 HVAC Air Conditioning - Tundra

DTC B1412/12 AMBIENT TEMPERATURE SENSOR CIRCUIT

DESCRIPTION

The ambient temperature sensor is installed in front of the condenser to detect the ambient temperature. This
sensor is connected to the air conditioning amplifier and detects fluctuations in the ambient temperature. This
data is used for controlling the cabin temperature. The sensor sends a signal to the air conditioning amplifier.
The resistance of the ambient temperature sensor changes in accordance with the ambient temperature. As the
temperature decreases, the resistance increases. As the temperature increases, the resistance decreases.

The air conditioning amplifier applies voltage (5 V) to the ambient temperature sensor and reads voltage
changes as the resistance of the ambient temperature sensor changes.

DTC DETECTION CONDITION CHART

WIRING DIAGRAM

B1441/41

Motor Circuit (Passenger Side)



Air conditioning harness



Air conditioning amplifier

B1442/42

Air Inlet Damper Control Servo
Motor Circuit



Air inlet servo motor



Air conditioning harness



Air conditioning amplifier

B1443/43

Air Outlet Damper Control Servo
Motor Circuit



Air outlet servo motor



Air conditioning harness



Air conditioning amplifier

B1446/46

Air Mix Damper Control Servo
Motor Circuit (Driver Side)



Air mix servo motor (for
driver side)



Air conditioning harness



Air conditioning amplifier

B1497/97

BUS IC Communication
Malfunction



Air conditioning harness



Air conditioning amplifier

B1499/99

Multiplex Communication Circuit CAN communication system

DTC

DTC Detection Condition

Trouble Area

B1412/12

Open or short in ambient
temperature sensor circuit



Ambient temperature sensor



Harness or connector
between ambient temperature
sensor and air conditioning
amplifier



Air conditioning amplifier

2009 Toyota Tundra

2009 HVAC Air Conditioning - Tundra