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.

IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE

Enter the diagnostic mode.

Fig 1: 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 shown in the preceding illustration as an example.
For details of the DTC display, refer to DTC Check/Clear (See DTC CHECK / CLEAR ).

CHECK POWER SOURCE CIRCUIT OF COMPONENT WHICH HAS STORED THIS CODE

Inspect the power source circuit of the component which has stored this code.
If the power source circuit is operating normally, proceed to the next step.

Component Table

COMPONENT CHART

Component	Proceed to
Stereo component amplifier	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 SPECIFICATION

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

NG: REPLACE RADIO RECEIVER (See REMOVAL )

Fig 2: Identifying Radio Receiver Connector Terminals

OK: Go to Next Step

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 COMPONENT WHICH HAS STORED THIS CODE
1. Replace the component which has stored this code with a known good one and check if the same problem occurs again.
  OK: Same problem does not occur.
  
  NG: REPLACE RADIO RECEIVER (See REMOVAL )
  
  OK: END