Toyota Sequoia (2005). Manual - part 570

I28767

Headphone Terminal
Connector Front View:

Rear Seat Controller 
Wire Harness View:

H11

H10

HPR

HPL SGND

SGN1

HP1L

HP1R

SGN2

HP2R

R24

HP2L

–

DIAGNOSTICS

REAR SEAT AUDIO SYSTEM

DI–2075

2269

2

Check harness and connector (Rear seat audio controller – headphone terminal).

PREPARATION:
Disconnect the rear seat audio controller and headphone termi-
nal connectors.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Symbol (Tester connection)

Specified condition

HP1R (R24–3) – HPR (H10–1)

Below 1 

Ω

HP1L (R24–2) – HPL (H10–2)

Below 1 

Ω

HP2R (R24–15) – HPR (H11–1)

Below 1 

Ω

HP2L (R24–14) – HPL (H11–2)

Below 1 

Ω

SGN1 (R24–1) – SGND (H10–3)

Below 1 

Ω

SGN2 (R24–13) – SGND (H11–3)

Below 1 

Ω

HPR (H10–1, H11–1) – Body ground

10 k

Ω 

or higher

HPL (H10–2, H11–2) – Body ground

10 k

Ω 

or higher

SGND (H10–3, H11–3) – Body ground

10 k

Ω 

or higher

NG

Repair or replace harness or connector.

OK

Replace headphone terminal.

DI–2076

–

DIAGNOSTICS

REAR SEAT AUDIO SYSTEM

2270

Remote control system does not operate

INSPECTION PROCEDURE

1

Check malfunction symptoms.

CHECK:
Check obstruction.

Check that there are no obstructions between the switch assy and the infrared ray light emission por-
tion of the rear seat audio controller.

OK:

No obstructions

NG

Remove the obstructions.

OK

2

Check battery (Switch assy).

CHECK:
Check battery.

Check that the dry–cell battery used for the switch assy is not dead.

OK:

It is not dead.

NG

Replace dry–cell battery.

OK

DIDAR–01

–

DIAGNOSTICS

REAR SEAT AUDIO SYSTEM

DI–2077

2271

3

Clean the infrared ray emitted portion.

CHECK:
(a)

Clean the infrared ray emitting portion on the rear seat audio controller.

(b)

Check whether the same malfunction occurs.

OK:

The function returns to normal.

OK

End.

NG

4

Replace switch assy.

CHECK:
Replace the switch assy and check if it operates normally.
OK:

Normal operation.

OK

End.

NG

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

DI–2050

).

DIDAS–01

DI–2078

–

DIAGNOSTICS

REAR SEAT ENTERTAINMANT SYSTEM

2272

REAR SEAT ENTERTAINMANT SYSTEM

PRECAUTION

NOTICE:
When disconnecting the battery terminal, initialize the following system after the terminal is recon-
nected.

System Name

See Page

Back Door Power Window Control System

BE–77