Inspection Procedure

WARNING: This page is about a different car, the 2009 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Be sure to read Description before performing the following procedures.

CHECK RADIO RECEIVER POWER SOURCE CIRCUIT
Refer to Radio Receiver Power Source Circuit (See RADIO RECEIVER POWER SOURCE CIRCUIT ).

If the power source circuit is operating normally, proceed to the next step.

INSPECT RADIO RECEIVER

Disconnect the radio receiver connector.
Measure the resistance according to the value(s) in the table below.

Standard Resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
E103-5 (ATX+) - E103-15 (ATX-)	Always	60 to 80 Ω

NG: REPLACE RADIO RECEIVER (See REMOVAL )

Fig 1: Identifying Radio Receiver Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE

Enter the diagnostic mode.

Fig 2: Service Check Mode Flow Chart - Diagnostic Mode
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Press the preset switch "3" to change the mode to "Detailed Information Mode".
Identify the component which has stored this code.

Component Table

COMPONENT CHART

Component	Physical Address
Stereo component amplifier	440

HINT:

"P440" set by the stereo component amplifier is shown in the preceding illustration as an example.
For details of the DTC display, refer to DTC Check/ Clear (See DTC CHECK / CLEAR ).

CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMPONENT WHICH HAS STORED THIS CODE)
HINT:

For details of the connectors, refer to Terminals of ECU (See TERMINALS OF ECU ).
1. Referring to the following AVC-LAN Wiring Diagram, check the AVC-LAN circuit between the radio receiver and the component which has stored this code.
  1. Disconnect all connectors between the radio receiver and the component which has stored this code.
  2. Check for an open or short in the AVC-LAN circuit between the radio receiver and the component which has stored this 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 RADIO RECEIVER
1. Replace the radio receiver with a known good one and check if the same problem occurs again.
  OK: Same problem does not occur.
  
  NG: REPLACE COMPONENT WHICH HAS STORED THIS CODE
  
  OK: END