Toyota Tundra. Manual — part 173
Fig. 112: 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 COMPONENT SHOWN BY SUB-CODE
a. Select the component which has stored this code.
HINT:
2009 Toyota Tundra
2009 ACCESSORIES AND EQUIPMENT Audio/Visual - Tundra
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
A: REPLACE RADIO RECEIVER (see REMOVAL )
B: REPLACE RADIO RECEIVER (see REMOVAL )
C: Go to Next Step
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.
Component table:
COMPONENT TABLE
If the power source circuit is operating normally, proceed to the next step.
4. 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
Component
Proceed to
"Bluetooth" handsfree module (for Column Shift Type)
A
"Bluetooth" handsfree module (for Floor Shift Type)
B
Except "Bluetooth" handsfree module
C
Component
Proceed to
Stereo component
amplifier (440)
Stereo component amplifier power source circuit (see STEREO
COMPONENT AMPLIFIER POWER SOURCE CIRCUIT )
Tester Connection
Condition Specified Condition
K4-5(ATX+) - K4-15 (ATX-) Always
60 to 80 ohms
Result
Proceed to
OK
A
2009 Toyota Tundra
2009 ACCESSORIES AND EQUIPMENT Audio/Visual - Tundra
B: REPLACE RADIO RECEIVER (see REMOVAL )
Fig. 113: 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
5. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - 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 radio
receiver and the component shown by the sub-code.
1. Disconnect all connectors between the radio receiver and the component shown by the
subcode.
2. Check for an open or short in the AVC-LAN circuit between the radio receiver and the
component shown by the sub-code.
OK: There is no open or short circuit.
NG (for Column Shift Type)
B
NG (for Floor Shift Type)
C
2009 Toyota Tundra
2009 ACCESSORIES AND EQUIPMENT Audio/Visual - Tundra
Fig. 114: 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
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.
Result:
RESULT REFERENCE
B: REPLACE RADIO RECEIVER (see REMOVAL )
C: REPLACE RADIO RECEIVER (see REMOVAL )
A: END
STEREO COMPONENT AMPLIFIER COMMUNICATION ERROR
INSPECTION PROCEDURE
1. IDENTIFY COMPONENT SHOWN BY SUB-CODE
a. Enter the diagnostic mode.
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
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