Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Be sure to read Description before performing the following procedures.

CHECK RADIO RECEIVER POWER SOURCE CIRCUIT
1. Refer to Radio Receiver Power Source Circuit (See RADIO RECEIVER POWER SOURCE CIRCUIT ).
  HINT:
  
  If the power source circuit is operating normally, proceed to the next step.

IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE

Enter the diagnostic mode.

Fig 1: Service Check And Detailed Information Mode Flow Diagram
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Press the preset switch "3" to change to "Detailed Information Mode".

Identify the component which has stored this code.

Component Table

COMPONENT REFERENCE

Component	Physical Address
Stereo component amplifier	440
"Bluetooth" handsfree module	19D
Television display*	1B0
HINT: *: w/ Rear Seat Entertainment System "440 (stereo component amplifier)" is the component which has stored this code in the example shown in the illustration. For details of the DTC display, refer to "DTC Check/Clear" (See DTC CHECK/CLEAR ).

CHECK COMPONENT WHICH HAS STORED THIS CODE

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 REFERENCE

Component	Proceed to
Except "Bluetooth" handsfree module	A
"Bluetooth" handsfree module (for Column Shift Type)	B

B: REPLACE RADIO RECEIVER ASSEMBLY (See REMOVAL )

A: Go to next step

CHECK POWER SOURCE CIRCUIT OF COMPONENT WHICH HAS STORED THIS CODE

Inspect the power source circuit of the component which has stored this code.

HINT:

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

Component Table

COMPONENT REFERENCE

Component	Proceed to
Stereo component amplifier	Stereo Component Amplifier Power Source Circuit (See STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT )
Television display*	Television Display Assembly Power Source Circuit (See TELEVISION DISPLAY POWER SOURCE CIRCUIT )
HINT: *: w/ Rear Seat Entertainment System

INSPECT RADIO RECEIVER ASSEMBLY

Disconnect the I4 and I8* radio receiver assembly connectors.
HINT:

*: w/ Rear Seat Entertainment System

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION

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

Reconnect the radio receiver assembly connector.

NG: REPLACE RADIO RECEIVER ASSEMBLY (See REMOVAL )

Fig 2: Identifying Radio Receiver Assembly Connector Terminals

OK: Go to next step

CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMPONENT WHICH HAS STORED THIS CODE)

Fig 3: AVC-LAN - Wiring Diagram
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

For details of the connectors, refer to "Terminals of ECU" (See TERMINALS OF ECU ).
1. Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the radio receiver assembly and the component which has stored this code.
  1. Disconnect all connectors between the radio receiver assembly and the component which has stored this code.
  2. Check for an open or short in the AVC-LAN circuit between the radio receiver assembly and the component which has stored this code.
    OK: There is no open or short circuit.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step
REPLACE COMPONENT WHICH HAS STORED THIS CODE
1. Replace the component which has stored this code with a normal one and check if the same problem occurs again.
  OK: Same problem does not occur.
NG: REPLACE RADIO RECEIVER ASSEMBLY (See REMOVAL )

OK: END