Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.

IDENTIFY THE COMPONENT SHOWN BY SUB-CODE
1. Enter the diagnostic mode.
  
  Fig 1: Service Check Mode And Detailed Information Mode Flow Chart
  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 subcode in the example shown in the illustration.
  - For details of the DTC display, refer to "DTC CHECK/ CLEAR ."

CHECK COMPONENT SHOWN BY SUB-CODE

Select the component shown by sub-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 CHART

Component	Proceed to
"Bluetooth" handsfree module (19D)	A
Except "Bluetooth" handsfree module	B

A: REPLACE RADIO RECEIVER

B: Go to Next Step

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.

Component Table:

COMPONENT CHART

Component	Proceed to
Stereo component amplifier (440)	(See STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT )

INSPECT RADIO RECEIVER

Disconnect the radio receiver connectors.

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

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
ATX+ - ATX-	Always	60 to 80 Ω

Fig 2: Identifying Radio Receiver Connector Terminals

NG: REPLACE RADIO RECEIVER

OK: Go to Next Step

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 ."
1. 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 sub-code.
  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.
    
    Fig 3: AVC-LAN Wiring Diagram
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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 RADIO RECEIVER

OK: END