Inspection Procedure

Total OBD & ECU Auto Diagnostics

TOAD Auto Diagnostics

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READ VALUE OF INTELLIGENT TESTER

(a) Connect the intelligent to the DLC3.

(b) Turn the ignition switch on (IG) and push the intelligent tester main switch on.

(c) Select the item below in the DATA LIST, and read the display 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.: 65.96°C (150.71°F)

Actual ambient temperature is displayed

The display is as specified in the normal condition.

Result

The display is as specified in the normal condition.

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

INSPECT ENGINE ROOM JUNCTION BLOCK ASSEMBLY (FRONT CONTROLLER)

(a) Remove the engine room J/B assembly (front controller) with connectors still connected.

(b) Turn the ignition switch on (IG).

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

Voltage

Tester connection

Condition

Specified condition

1I-4 - 1I-5

Ignition switch on (IG) at 25°C (77°F)

1.8 to 2.2 V

1I-4 - 1I-5

Ignition switch on (IG) at 40°C (104°F)

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)

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

Go to step S

INSPECT A/C AMBIENT TEMPERATURE SENSOR

Resistance (kQ)

Resistance (kQ)

40 104

I041430E07

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

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

Tester connection

Condition

Specified condition

A11-1 - A11-2

10°C (50°F)

3.00 to 3.73 kQ

A11-1 - A11-2

15°C (59°F)

2.45 to 2.88 kQ

A11-1 - A11-2

20°C (68°F)

1.95 to 2.30 kQ

A11-1 - A11-2

25°C (77°F)

1.S0 to 1.80 kQ

A11-1 - A11-2

30°C (86°F)

1.28 to 1.47 kQ

A11-1 - A11-2

35°C (95°F)

1.00 to 1.22 kQ

A11-1 - A11-2

40°C (104°F)

0.80 to 1.00 kQ

A11-1 - A11-2

45°C (113°F)

0.S5 to 0.85 kQ

A11-1 - A11-2

50°C (122°F)

0.50 to 0.70 kQ

A11-1 - A11-2

55°C (131°F)

0.44 to 0.S0 kQ

A11-1 - A11-2

S0°C (140°F)

0.3S to 0.50 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 AMBIENT TEMPERATURE SENSOR

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