Toyota Tundra (2015 year). Manual — part 2252
(a) Disconnect the A15 sensor connector.
(b) Disconnect the J19 air conditioning amplifier connector.
(c) Measure the resistance according to the value(s) in the table
below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED
CONDITION
A15-1 - J19-5 (TAM)
Always
Below 1 Ω
A15-2 - J19-13 (SG-2)
A15-1 or J19-5 (TAM) - Body
ground
Always
10 kΩ or higher
A15-2 or J19-13 (SG-2) - Body
ground
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE AIR CONDITIONING AMPLIFIER
AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic A...
Last Modified: 9-16-2014
6.6 C
Doc ID: RM000002VXD00XX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System): B1413/13;
Evaporator Temperature Sensor Circuit; 2015 MY Tundra [08/2014 - ]
DTC
B1413/13 Evaporator Temperature Sensor Circuit
DESCRIPTION
The No. 1 cooler thermistor is installed on the evaporator in the air conditioner unit to detect the cooled air
temperature that has passed through the evaporator and control the air conditioning. It sends appropriate signals
increases. As the temperature increases, the resistance decreases.
The air conditioning amplifier applies voltage (5 V) to the No. 1 cooler thermistor and reads voltage changes as
DTC DETECTION CONDITION
TROUBLE AREA
B1413/13
Open or short in evaporator temperature sensor circuit
No. 1 cooler thermistor
Air conditioning harness
Air conditioning amplifier
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic A...
A
1.
READ VALUE USING TECHSTREAM (EVAPORATOR FIN THERMISTOR)
(a) Use the Data List to check if the No. 1 cooler thermistor is functioning properly.
Air Conditioner
TESTER DISPLAY
MEASUREMENT ITEM /
RANGE
NORMAL CONDITION
DIAGNOSTIC NOTE
Evaporator Fin
Thermistor
No. 1 cooler thermistor /
Min.: -29.7°C (-21.46°F)
Max.: 59.55°C
(139.19°F)
Actual No. 1 cooler thermistor is
displayed
Open in circuit: -29.7°C
(-21.46°F)
Short in circuit: 59.55°C
(139.19°F)
OK:
The display is as specified in the normal condition.
Result
RESULT
PROCEED TO
NG
A
OK (Checking from the PROBLEM SYMPTOMS TABLE)
B
OK (Checking from the DTC)
C
B
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN
PROBLEM SYMPTOMS TABLE
C
REPLACE AIR CONDITIONING AMPLIFIER
2.
INSPECT NO. 1 COOLER THERMISTOR
AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic A...
OK
(a) Remove the No. 1 cooler thermistor connector
.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
1 - 2
-10°C (14°F)
7.30 to 9.10 kΩ
-5°C (23°F)
5.65 to 6.95 kΩ
0°C (32°F)
4.40 to 5.35 kΩ
5°C (41°F)
3.40 to 4.15 kΩ
10°C (50°F)
2.70 to 3.25 kΩ
15°C (59°F)
2.14 to 2.58 kΩ
20°C (68°F)
1.71 to 2.05 kΩ
25°C (77°F)
1.38 to 1.64 kΩ
30°C (86°F)
1.11 to 1.32 kΩ
NOTICE:
As the temperature increases, the resistance decreases (see the graph).
NG
REPLACE NO. 1 COOLER THERMISTOR
3.
REPAIR OR REPLACE AIR CONDITIONING HARNESS
AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic A...
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