AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: INSPECTION PROCEDURE (2008 Sequoia)

Last Modified: 11-29-2007		1.6 J
Service Category: Audio/Visual/Telematics	Section: Audio/Video
Model Year: 2008	Model: Sequoia	Doc ID: RM00000184104CX
Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: INSPECTION PROCEDURE (2008 Sequoia)

Radio Receiver Communication Error

INSPECTION PROCEDURE

PROCEDURE

1.	IDENTIFY COMPONENT SHOWN BY SUB-CODE

(a) Enter the diagnostic mode.

(b) Press the preset switch "3" to change to "Detailed Information Mode".

HINT:

"190 (radio receiver)" is the component shown by the sub-code in the example shown in the illustration.

For details of the DTC display, refer to "DTC Check/Clear" .

2.	CHECK COMPONENT SHOWN BY SUB-CODE

(a) Select the component which has stored this code.

HINT:

The "Bluetooth" handsfree module is built into the radio receiver assembly. If there is a problem between the "Bluetooth" handsfree module and radio receiver assembly, replace the radio receiver assembly.

Component Table

Component	Proceed to
Except "Bluetooth" handsfree module	A
"Bluetooth" handsfree module	B

3.	CHECK POWER SOURCE CIRCUIT OF COMPONENT SHOWN BY SUB-CODE

(a) Inspect the power source circuit of the component shown by the sub-code.

HINT:

If the power source circuit is operating normally, proceed to the next step.

Component Table

Component	Proceed to
Stereo component amplifier (440)	Stereo Component Amplifier Power Source Circuit
Television display (1B0)*	Television Display Assembly Power Source Circuit

HINT:

*: w/ Rear Seat Entertainment System

4.	INSPECT RADIO RECEIVER ASSEMBLY

(a) Disconnect the I4 and I8* radio receiver assembly connectors.

HINT:

*: w/ Rear Seat Entertainment System

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
I4-5 (ATX+) - I4-15 (ATX-)	Always	60 to 80 Ω
I8-9 (TXM+) - I8-10 (TXM-)*	Always	60 to 80 Ω

HINT:

*: w/ Rear Seat Entertainment System

5.	CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - COMPONENT SHOWN BY SUB-CODE)

HINT:

Start the check from the circuit that is near the component shown by the sub-code first.

For details of the connectors, refer to "Terminals of ECU" .

(a) Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the radio receiver assembly and the component shown by the sub-code.

(1) Disconnect all connectors between the radio receiver assembly and the component shown by the sub-code.

(2) Check for an open or short in the AVC-LAN circuit between the radio receiver assembly and the component shown by the sub-code.

OK:

There is no open or short circuit.

6.	REPLACE COMPONENT SHOWN BY SUB-CODE

(a) Replace the component shown by the sub-code with a normal one and check if the same problem occurs again.

OK:

Same problem does not occur.