DTC B1413/13: Evaporator Temperature Sensor Circuit [10/2014 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Air Conditioner / Data List.
5. Check the value(s) by referring to the table below.
   AIR CONDITIONER
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Evaporator Fin Thermistor	No. 1 cooler thermistor / Min.: -29.70°C (-21.46°F) Max.: 59.55°C (139.19°F)	Actual evaporator temperature displayed	-

   OK

   The display is as specified in the normal condition column.

   Result

   Result	Proceed to
   NG	A
   OK (When troubleshooting according to Problem Symptoms Table)	B
   OK (When troubleshooting according to the DTC)	C

Result: 

B 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

(Refer to PROBLEM SYMPTOMS TABLE [10/2014 - 10/2015] or PROBLEM SYMPTOMS TABLE [10/2015 - ] )

Result: 

C 

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY 

(Refer to REMOVAL [10/2014 - ] )

Result: 

A 

See step  2

1. Remove the No. 1 cooler thermistor (Refer to REMOVAL [10/2014 - ] ).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (No. 1 Cooler Thermistor)	*b	Sensing Portion
   *c	Resistance (kΩ)	*d	Allowable Range
   *e	Temperature (°C (°F))	-	-

2. 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
   1 - 2	-5°C (23°F)	5.65 to 6.95 kΩ
   1 - 2	0°C (32°F)	4.40 to 5.35 kΩ
   1 - 2	5°C (41°F)	3.40 to 4.15 kΩ
   1 - 2	10°C (50°F)	2.70 to 3.25 kΩ
   1 - 2	15°C (59°F)	2.14 to 2.58 kΩ
   1 - 2	20°C (68°F)	1.71 to 2.05 kΩ
   1 - 2	25°C (77°F)	1.38 to 1.64 kΩ
   1 - 2	30°C (86°F)	1.11 to 1.32 kΩ

   NOTE:

   • Hold the sensor only by its connector. Touching the sensing portion may change the resistance value.
   • When measuring, the sensor temperature must be the same as the ambient temperature.

   HINT: 

   As the temperature increases, the resistance decreases (see the graph).

Result: 

NG 

REPLACE NO. 1 COOLER THERMISTOR 

(Refer to REMOVAL [10/2014 - ] )

Result: 

OK 

See step  3

1. Remove the air conditioning harness assembly (Refer to REMOVAL [10/2014 - 10/2015] or REMOVAL [10/2015 - ] ).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   z1-6 (TEA) - ae-2	Always	Below 1 Ω
   z1-5 (SGA) - ae-1	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Air Conditioning Amplifier Assembly)
   *b	Front view of wire harness connector (to No. 1 Cooler Thermistor)

Result: 

OK 

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY 

(Refer to REMOVAL [10/2014 - ] )

Result: 

NG 

REPLACE AIR CONDITIONING HARNESS ASSEMBLY 

(Refer to REMOVAL [10/2014 - 10/2015] or REMOVAL [10/2015 - ] )