Toyota Tundra. Manual — part 174
![](/vehicles/linovind/mig/whoceedonodb/meesodithis.png)
Fig. 115: Service Check Mode And Detailed Information Diagnostic Mode Flow Chart
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
b. Press the preset switch "3" to change to "Detailed Information Mode".
c. Identify the component shown by the sub-code.
HINT:
"190 (radio receiver)" is the component shown by the subcode in the example shown in the
illustration.
For details of the DTC display, refer to "DTC CHECK / CLEAR" .
2. CHECK POWER SOURCE CIRCUIT OF COMPONENT SHOWN BY SUB-CODE
a. 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.
2009 Toyota Tundra
2009 ACCESSORIES AND EQUIPMENT Audio/Visual - Tundra
![](/vehicles/linovind/mig/whoceedonodb/kandax.png)
HINT:
The "Bluetooth" handsfree module is built into the radio receiver.
Component table:
COMPONENT TABLE
3. INSPECT RADIO RECEIVER
a. Disconnect the K4 receiver connector.
b. Measure the resistance according to the value(s) in the table below.
Standard resistance
TESTER CONNECTION SPECIFIED CONDITION
Result:
RESULT REFERENCE
B: REPLACE RADIO RECEIVER (see REMOVAL )
Component
Proceed to
"Bluetooth" handsfree
module (19D)
Radio receiver power source circuit (see RADIO RECEIVER
POWER SOURCE CIRCUIT )
Radio receiver (190)
Radio receiver power source circuit (see RADIO RECEIVER
POWER SOURCE CIRCUIT )
Tester Connection
Condition Specified Condition
K4-5(ATX+) - K4-15 (ATX-) Always
60 to 80 ohms
Result
Proceed to
OK
A
NG (for Column Shift Type)
B
NG (for Floor Shift Type)
C
2009 Toyota Tundra
2009 ACCESSORIES AND EQUIPMENT Audio/Visual - Tundra
![](/vehicles/linovind/mig/whoceedonodb/yoyor.png)
Fig. 116: Identifying K4 Receiver Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
C: REPLACE RADIO RECEIVER (see REMOVAL )
A: Go to Next Step
4. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER-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 the "TERMINALS OF ECU" .
a. Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the stereo
component amplifier and the component shown by the sub-code.
1. Disconnect all connectors between the stereo component amplifier and the component shown
by the sub-code.
2. Check for an open or short in the AVC-LAN circuit between the stereo component amplifier
and the component shown by the sub-code.
OK: There is no open or short circuit.
2009 Toyota Tundra
2009 ACCESSORIES AND EQUIPMENT Audio/Visual - Tundra
![](/vehicles/linovind/mig/whoceedonodb/ndoweeanoid.png)
Fig. 117: AVC-LAN Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to Next Step
5. 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.
NG: REPLACE STEREO COMPONENT AMPLIFIER (see REMOVAL )
OK: END
BLUETOOTH HANDSFREE MODULE COMMUNICATION ERROR
INSPECTION PROCEDURE
1. IDENTIFY COMPONENT SHOWN BY SUB-CODE
a. Enter the diagnostic mode.
2009 Toyota Tundra
2009 ACCESSORIES AND EQUIPMENT Audio/Visual - Tundra
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