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 IG And GND Of Integration Control And Panel Connector
Preparation:
1. Remove integration control and panel with connectors still connected.
2. Turn ignition switch to ON.
Check:

Measure voltage between terminals IG and GND of integration control and panel.

OK:

Voltage: 10 - 14 V .

Fig 1: Locating Integration Control And Panel IG & GND Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. OK: Proceed to next circuit inspection shown on problem symptoms table. See PROBLEM SYMPTOMS TABLE .
2. NG: Go to next step.
Check continuity between terminal GND of integration control and panel and body ground.
Preparation:

Turn ignition switch to LOCK.

Check:

Measure resistance between terminal GND of A/C control assembly and body ground.

Fig 2: Locating A/C Control Assembly GND Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK:

Resistance: Below 1 Ω .
1. NG: Repair or replace harness or connector.
2. OK: Go to next step.
Check GAUGE fuse.
Preparation:

Remove GAUGE fuse from instrument panel J/B.

Fig 3: Locating Guage Fuse
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Check:

Check continuity of GAUGE fuse.

OK:

Continuity exists.
1. NG: Check for short in all the harness and components connected to the gauge fuse.
2. OK: Check and repair harness and connector between integration control and panel and battery.