Inspection Procedure

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

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

CHECK RADIO RECEIVER POWER SOURCE CIRCUIT
1. Refer to the RADIO RECEIVER POWER SOURCE CIRCUIT .
  If the power source circuit is operating normally, proceed to the next step.

INSPECT RADIO RECEIVER

Disconnect the K4 and K22* receiver connectors.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
K4-5(ATX+) - K4-15 (ATX-)	Always	60 to 80 Ω
K22-9(TXM+) - K22-10 (TXM-)*	Always	60 to 80 Ω
HINT: *: w/ Rear Seat Entertainment System

Result:

RESULT REFERENCE

Result	Proceed to
OK	A
NG (for Column Shift Type)	B
NG (for Floor Shift Type)	C

B: REPLACE RADIO RECEIVER (see REMOVAL )

C: REPLACE RADIO RECEIVER (see REMOVAL )

Fig 1: Identifying K4 And K22 Connectors Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

A: Go to Next Step

IDENTIFY COMPONENT WHICH HAS STORED THIS CODE

Enter the diagnostic mode.

Fig 2: Service Check Mode And Detailed Information Diagnostic Mode Flow Chart
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 TABLE

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 " .

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

Component table:

COMPONENT TABLE

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

A: REPLACE RADIO RECEIVER (see REMOVAL )

B: REPLACE RADIO RECEIVER (see REMOVAL )

C: 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 the "TERMINALS OF ECU " .
1. Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the radio receiver and the component which has stored this code.
  1. Disconnect all connectors between the radio receiver and the component which has stored this code.
  2. Check for an open or short in the AVC-LAN circuit between the radio receiver 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 RADIO RECEIVER
1. Replace the radio receiver for column shift type (see REMOVAL ) or floor shift type (see REMOVAL ).
  OK: Same problem does not occur.
NG: REPLACE COMPONENT WHICH HAS STORED THIS CODE

OK: END