Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.

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

CHECK NAVIGATION RECEIVER POWER SOURCE CIRCUIT
1. Refer to the NAVIGATION RECEIVER POWER SOURCE CIRCUIT .
  If the power source circuit is operating normally, proceed to the next step.

INSPECT NAVIGATION RECEIVER

Disconnect the K18 and K8 receiver connectors.

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

Standard resistance

NAVIGATION RECEIVER TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
K18-5(ATX+) - K18-15 (ATX-)	Always	60 to 80 Ω
K8-9(TXM+) - K8-10 (TXM-)*	Always	60 to 80 Ω
HINT: *: w/ Rear Seat Entertainment System

Fig 1: Identifying K18 And K8 Receiver Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Result

NAVIGATION RECEIVER RESULT CHART

Result	Proceed to
OK	A
NG (for Column Shift Type)	B
NG (for Floor Shift Type)	C

B: REPLACE NAVIGATION RECEIVER (see REMOVAL (For Column Shift Type) )

C: REPLACE NAVIGATION RECEIVER (see REMOVAL (For Floor Shift Type) )

A: Go to 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

COMPONENT CHART

Display	Component
DSP-AMP	Stereo component amplifier
Rr-TV*	Television display
HINT: "DSP-AMP" is the component which has stored this code in the example shown in the illustration. *: w/ Rear Seat Entertainment System

Fig 2: Diagnostic Menu Screen Display - LAN Monitor Mode

CHECK HARNESS AND CONNECTOR (NAVIGATION 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 navigation receiver and the component which has stored this code.
  1. Disconnect all connectors between the navigation receiver and the component which has stored this code.
  2. Check for an open or short in the AVC-LAN circuit between the navigation receiver and the component which has stored this code.
    OK: There is no open or short circuit.
    
    Fig 3: AVC-LAN Wiring Diagram (W/O Rear Seat Entertainment System)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 4: AVC-LAN Wiring Diagram (W/ Rear Seat Entertainment System)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step
REPLACE NAVIGATION RECEIVER
1. Replace the navigation receiver (for Column Shift Type) with a normal one (see REMOVAL ).
2. Replace the navigation receiver (for Floor Shift Type) with a normal one (see REMOVAL ).
3. Check if the same problem occurs again.
  OK: Same problem does not occur.
NG: REPLACE COMPONENT WHICH HAS STORED THIS CODE

OK: END