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Inspection Procedure

IDENTIFY THE COMPONENT SHOWN BY SUB-CODE
1. Enter diagnostic mode.
  
  Fig 1: Service Check Mode Flow Chart - Diagnostic Mode
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Press the preset switch "3" to change the mode to "Detailed Information Mode".
3. Identify the component shown by the sub-code.
  HINT:
  - "P190" set by the radio receiver is shown in the preceding illustration as an example.
  - For details of the DTC display, refer to 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.

Component Table

COMPONENT REFERENCE CHART

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

INSPECT RADIO RECEIVER

Disconnect the radio receiver connector.

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

Standard Resistance

RESISTANCE SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
E40-5 (ATX+) - E40-15 (ATX-)	Always	60 to 80 Ω

Fig 2: Identifying E40 Radio Receiver Connector

G06035676

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE RADIO RECEIVER (See REMOVAL )

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 TERMINALS OF ECU .
1. Referring to the following AVC-LAN Wiring Diagram, 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.
    
    Fig 3: AVC-LAN Wiring Diagram
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    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 known good one and check if the same problem occurs again.
  OK:
  
  Malfunction disappears .
  
  NG: REPLACE RADIO RECEIVER (See REMOVAL )
  
  OK: END