Inspection Procedure

WARNING: This page is about a different car, the 2009 Toyota Tacoma. 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: Identifying Service Check Mode And Detailed Information Mode
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Press the preset switch "3" 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
"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 )

INSPECT RADIO RECEIVER ASSEMBLY

Disconnect the R1 radio receiver assembly connectors.

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

Standard Resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
R1-5 (TX+) - R1-15 (TX-)	Always	60 to 80 Ω

Reconnect the radio receiver assembly connectors.

NG: REPLACE RADIO RECEIVER ASSEMBLY (See REMOVAL )

Fig 2: Identifying R1 Radio Receiver Assembly Connector Terminals

OK: Go to next step.

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - 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 stereo component amplifier assembly and the component shown by the sub-code.
    1. Disconnect all connectors between the stereo component amplifier assembly 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 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 STEREO COMPONENT AMPLIFIER ASSEMBLY (See REMOVAL )

OK: END