Toyota Sequoia (2005). Manual - part 642

I28842

Integration Control
and Panel

IG+

Battery

15 A GAUGE

3A

5

3E

2

I19

R–L

B–Y

5

I18
Ignition Switch

2

1

AM1

1L

W–L

IG1

40 A AM1

1C

1C

1E

B

W

8

F10
Fusible Link Block

W–L

R–L

4

7

15

R–L

1

6

Instrument Panel J/B

Instrument Panel J/B

I19

10

GND

140 A ALT

O

J43

J43

J/C

A

A

O

2

1

Sub J/B No. 3

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

DI–2363

2557

IG Power Source Circuit

CIRCUIT DESCRIPTION

This is the power source for the integration control and panel and servomotors, etc.

WIRING DIAGRAM

DI937–04

I28847

IG+

GND

I19

Integration Control and Panel:

I28847

GND

I19

Integration Control and Panel:

DI–2364

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

2558

INSPECTION PROCEDURE

1

Check voltage between terminals IG+ and GND of integration control and panel.

PREPARATION:
(a)

Remove the integration control and panel with connec-
tors still connected (See page 

AC–103

).

(b)

Turn the ignition switch to ON.

CHECK:
Measure the voltage between terminals IG+ and GND of the in-
tegration control and panel.
OK:

Voltage : 10 to 14 V

OK

Proceed to next circuit inspection shown in
problem symptoms table (See page 

DI–2304

).

NG

2

Check continuity between terminal GND of integration control and panel and
body ground.

PREPARATION:
Turn the ignition switch to LOCK.
CHECK:
Measure the resistance between terminal GND of the A/C con-
trol assembly and body ground.
OK:

Resistance : Below 1 

Ω

NG

Repair or replace harness or connector.

OK

I15901

GAUGE Fuse

Instrument panel J/B

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

DI–2365

2559

3

Check GAUGE fuse.

PREPARATION:
Remove the GAUGE fuse from the instrument panel J/B.
CHECK:
Check continuity of the GAUGE fuse.
OK:

Continuity exists.

NG

Check for shot in all the harness and compo-
nents connected to the GAUGE fuse (See page

IN–35

).

OK

Check and repair harness and connector between integration control and panel and battery.

I24456

Integration Control
and Panel

Engine Room J/B

Battery

F10
Fusible Link
Block

Instrument
Panel J/B

10 A DOME SHORT PIN

R

1J

3A

3E

I19

2C

2D

B

Sub J/B No. 3

B

B

R

5

8

1

3

5

4

16

6

1E

1

R

R

+B

DI–2366

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

2560

Back–up Power Source Circuit

CIRCUIT DESCRIPTION

This is the back up power source for the integration control and panel. Power is supplied even when the
ignition switch is off and is used for diagnostic trouble code memory, etc.

WIRING DIAGRAM

DI3FL–10