Inspection Procedure

WARNING: This page is about a different car, the 2002 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.

Check Voltage Between Terminals TE And SG-2 Of Integration Control And Panel Connector
Preparation:

Remove integration control and panel with connectors still connected.

Check:
1. Turn ignition switch to ON.
2. Measure voltage between terminals TE and SG-2 of integration control and panel connector at each temperature.
OK:

Voltage:

at 0°C (32°F): 2.0 - 2.4 V .

at 15°C (59°F): 1.4 - 1.8 V .

Fig 1: Locating Integration Control And Panel TE & SG-2 Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: Go to step 2.
2. OK: Proceed to next circuit inspection shown on problem symptoms table. See PROBLEM SYMPTOMS TABLE . However, if DTC 13 is displayed, check and replace integration control and panel.

NOTE: As the temperature increases, the voltage decreases.

Fig 2: Testing Front Evaporator Temperature Sensor

Check Front Evaporator Temperature Sensor
Preparation:

Remove front evaporator temperature sensor.

Check:

Measure resistance between terminals 1 and 2 of evaporator temperature sensor connector at each temperature.

OK:

Resistance:

at 0°C (32°F): 4.5 - 5.2 kΩ .

at 15°C (59°F): 2.0 - 2.7 kΩ .
1. NG: Replace front evaporator temperature sensor.
2. OK: Go to next step.
Check Harness And Connector Between Integration Control And Panel And Front Evaporator Temperature Sensor .
1. NG: Repair or replace harness or connector.
2. OK: Check and replace integration control and panel.