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.

IDENTIFY COMPONENT SHOWN BY SUB-CODE
1. Enter the diagnostic mode.
  
  Fig 1: Service Check And Detailed Information Mode Flow Diagram
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Press the preset switch "2" to change to "Detailed Information Mode".
3. Identify the component shown by the sub-code.
  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" (See DTC CHECK/CLEAR ).

CHECK POWER SOURCE CIRCUIT OF COMPONENT SHOWN BY SUB-CODE

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

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

HINT:

The "Bluetooth" handsfree module is built into the radio receiver.

Component Table

COMPONENT REFERENCE

Component	Proceed to
Radio receiver (190)	Radio Receiver Power Source Circuit (See RADIO RECEIVER POWER SOURCE CIRCUIT )
"Bluetooth" handsfree module (19D)	Radio Receiver Power Source Circuit (See RADIO RECEIVER POWER SOURCE CIRCUIT )
Stereo component amplifier (440)	Stereo Component Amplifier Power Source Circuit (See STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT )

INSPECT RADIO RECEIVER ASSEMBLY

Disconnect the I4 and I8 radio receiver assembly connectors.

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

Reconnect the radio receiver assembly connectors.

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 ASSEMBLY - COMPONENT SHOWN BY SUB-CODE)

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

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" (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 shown by the sub-code.
  1. 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.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step
REPLACE COMPONENT SHOWN BY SUB-CODE
1. 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.
NG: REPLACE TELEVISION DISPLAY ASSEMBLY (See REMOVAL )

OK: END