Inspection Procedure

WARNING: This page is about a different car, the 2007 Toyota Prius. 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 MULTI-DISPLAY POWER SOURCE CIRCUIT
1. Refer to the MULTI-DISPLAY POWER SOURCE CIRCUIT .
  If the power source circuit is operating normally, proceed to the next step.

IDENTIFY COMPONENT WHICH HAS STORED THIS CODE

Enter the diagnostic mode.
Press the "LAN Mon" switch to change to "LAN Monitor" mode.

Identify the component which has stored this code.

Component table:

DIAGNOSTIC MODE REFERENCE CHART

Display	Component
AUDIO H/U	Radio receiver
DSP-AMP	Stereo component amplifier
G/W	Gateway ECU
NAVI	Navigation ECU
HINT: "NAVI" is the component which has stored this code in the example shown in the illustration.

Fig 1: Identifying "LAN Monitor" Screen Display

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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 REFERENCE

Component	Proceed to
Radio receiver (AUDIO H/U)	RADIO RECEIVER POWER SOURCE CIRCUIT
Stereo component amplifier (DSP-AMP)	STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT
Gateway ECU (G/W)	GATEWAY ECU POWER SOURCE CIRCUIT
Navigation ECU (NAVI)	NAVIGATION ECU POWER SOURCE CIRCUIT

INSPECT RADIO RECEIVER

Disconnect the R5 and R6 receiver connectors.

Measure the resistance of the receiver.

Standard resistance

STANDARD RESISTANCE REFERENCE CHART

Tester Connection	Specified Condition
R6-5 (TX+) - R6-15 (TX-)	60 to 80 Ω
R5-9 (TX+) - R5-10 (TX-)	60 to 80 Ω

NG: REPLACE RADIO RECEIVER ASSEMBLY

Fig 2: Check Radio Receiver Assembly

OK: Go to Next Step

CHECK WIRE HARNESS (MULTI-DISPLAY - 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 multi-display and the component which has stored this code.
  1. Disconnect all connectors between the multi-display and the component which has stored this code.
  2. Check for an open or short in the AVC-LAN circuit between the multi-display 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 AND CONNECTOR

OK: Go to Next Step
REPLACE COMPONENT WHICH HAS STORED THIS CODE
1. Replace the component which has stored this code with a normal one and check if the same problem occurs again.
  OK: Same problem does not occur.
NG: REPLACE MULTI-DISPLAY

OK: END