As the temperature increases the voltage decreases Result

Result

Proceed to

NG

A

OK (Checking from the PROBLEM SYMPTOM TABLE)

B

OK (Checking from the DTC)

C

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

INSPECT A/C ROOM TEMPERATURE SENSOR

Resistance (kQ)

40 104

40 104

I041430E06

(a) Remove the A/C room temperature sensor.

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

Tester connection

Condition

Specified condition

D34-1 - D34-2

10°C (50°F)

3.00 to 3.73 kQ

D34-1 - D34-2

15°C (59°F)

2.4S to 2.88 kQ

D34-1 - D34-2

20°C (68°F)

1.9S to 2.30 kQ

D34-1 - D34-2

25°C (77°F)

1.60 to 1.80 kQ

D34-1 - D34-2

30°C (86°F)

1.28 to 1.47 kQ

D34-1 - D34-2

3S°C (9S°F)

1.00 to 1.22 kQ

D34-1 - D34-2

40°C (104°F)

0.80 to 1.00 kQ

D34-1 - D34-2

4S°C (113°F)

0.6S to 0.8S kQ

D34-1 - D34-2

S0°C (122°F)

0.S0 to 0.70 kQ

D34-1 - D34-2

55°C (131°F)

0.44 to 0.60 kQ

D34-1 - D34-2

60°C (140°F)

0.36 to 0.S0 kQ

NOTICE:

• Only hold the sensor at its connector. Touching the sensor 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 ).

REPLACE A/C ROOM TEMPERATURE SENSOR

CHECK HARNESS AND CONNECTOR (A/C ROOM TEMPERATURE SENSOR - AIR CONDITIONING AMPLIFIER)

A/C Room Temperature Sensor Connector Front View:

Air Conditioning Amplifier Connector Wire Harness View:

(a) Disconnect the connector from A/C room temperature sensor.

(b) Disconnect the connector from A/C amplifier.

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

Resistance

Tester connection

Condition

Specified condition

D37-16 (TR) - D34-1

Always

Below 1 Q

D37-19 (SG-1) - D34-2

Always

Below 1 Q

D37-16 (TR) - Body ground

Always

10 kQ or higher

D37-19 (SG-1) - Body ground

Always

10 kQ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

I046086E12

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