Inspection Procedure

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

CHECK RADIO RECEIVER POWER SOURCE CIRCUIT
Refer to RADIO RECEIVER POWER SOURCE CIRCUIT .

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

NEXT

INSPECT RADIO RECEIVER

Disconnect the radio receiver connectors.

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

STANDARD RESISTANCE CHART

Tester Connection

Condition

Specified Condition

TX+ (E15-9) - TX- (E15-10)

Always

60 to 80

TXM+ (E17-9) - TXM-(E17-10) (⁽¹⁾)

Always

60 to 80

ATX+ (E12-5) - ATX-(E12-15) (⁽²⁾)

Always

60 to 80

⁽¹⁾	with Tape Player

⁽²⁾	for 12 Speaker System

NG: REPLACE RADIO RECEIVER

Fig 1: Disconnecting Radio Receiver Connectors

G04380019

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: Entering Diagnostic Mode (Example)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Press the preset switch "3" to change to "Detailed Information Mode".

Identify the component which has stored this code.

COMPONENT DESCRIPTION

Component	Physical address
Gateway ECU	1C6
Multi-display (Accessory meter)	1D4
Tape player	320
Stereo component amplifier	440

HINT:

"440 (stereo component amplifier)" is the component which has stored this code in the example shown in Fig 2.
For details of the DTC display, refer to DTC CHECK / CLEAR .

NEXT

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

For details of the connectors, refer to TERMINALS OF ECU .
1. Referring to the AVC-LAN wiring diagram below, 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 normal 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