Inspection Procedure

READ VALUE USING INTELLIGENT TESTER (AMBI TEMP SENS)

(a) Connect the intelligent tester with CAN VIM to the DLC3.

(b) Turn the ignition switch ON and turn the intelligent tester main switch ON.

(c) Select the item below in the DATA LIST, and read the value displayed on the intelligent tester.

DATA LIST / AIR CONDITIONER

Item

Measurement Item / Display (Range)

Normal Condition

Diagnostic Note

AMBI TEMP SENS

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

Actual ambient temperature is displayed

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

The display is as specified in the normal condition column.

Result

Result

Proceed to

NG

A

OK (Checking from the PROBLEM SYMPTOMS TABLE)

B

OK (Checking from the DTC)

C

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

REPLACE AIR CONDITIONING AMPLIFIER

INSPECT AMBIENT TEMPERATURE SENSOR

Component Side:

Ambient Temperature Sensor Sensor Area,

1_

_V

20 68

30 86

Temperature

E106870E09

(a) Remove the ambient temperature sensor.

(b) Measure the resistance. Standard resistance

Tester Connection

Condition

Specified Condition

1 - 2

10oC (50oF)

3.00 to 3.73 kQ

1 - 2

15oC (59oF)

2.45 to 2.88 kQ

1 - 2

20oC (68oF)

1.95 to 2.30 kQ

1 - 2

25oC (77oF)

1.60 to 1.80 kQ

1 - 2

30oC (86oF)

1.28 to 1.47 kQ

1 - 2

35oC (95oF)

1.00 to 1.22 kQ

1 - 2

40oC (104oF)

0.80 to 1.00 kQ

1 - 2

45oC (113oF)

0.65 to 0.85 kQ

1 - 2

50oC (122oF)

0.50 to 0.70 kQ

1 - 2

55oC (131oF)

0.44 to 0.60 kQ

1 - 2

60oC (140oF)

0.36 to 0.50 kQ

NOTICE:

• Touching the sensor even slightly may change the resistance value. Be sure to hold the connector of the sensor.

• When measuring, the sensor temperature must be the same as the ambient temperature.

HINT:

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

(c) Reinstall the ambient temperature sensor.

REPLACE AMBIENT TEMPERATURE SENSOR

CHECK HARNESS AND CONNECTOR (AMBIENT TEMPERATURE SENSOR - AIR CONDITIONING AMPLIFIER)

Wire Harness Side:

Ambient Temperature Sensor Connector

Front View

Air Conditioning Amplifier Connector w/o PTC Heater:

w/ PTC Heater:

(a) Disconnect the B5 ambient temperature sensor connector.

(b) Disconnect the E8 air conditioning amplifier connector.

(c) Measure the resistance. Standard resistance

Tester Connection

Specified Condition

B5-1 - E8-11 (SG-1)

Below 1 Q

B5-2 - E8-5 (TAM)

Below 1 Q

B5-1 - Body ground

10 kQ or higher

B5-2 - Body ground

10 kQ or higher

(d) Reconnect the ambient temperature sensor connector.

(e) Reconnect the air conditioning amplifier connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE AIR CONDITIONING AMPLIFIER

B1413/13

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