Inspection Procedure

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

CHECK NAVIGATION RECEIVER ASSEMBLY

Disconnect the I20 and I8* navigation receiver assembly connectors.
HINT:

*: w/ Rear Seat Entertainment System

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

Standard Resistance

STANDARD RESISTANCE

Tester Connection	Condition	Specified Condition
I20-5 (ATX+) - I20-15 (ATX-)	Always	60 to 80 Ω
I8-9(TXM+) - I8-10 (TXM-)*	Always	60 to 80 Ω
HINT: *: w/ Rear Seat Entertainment System

Reconnect the navigation receiver assembly connector.

NG: REPLACE NAVIGATION RECEIVER ASSEMBLY (See REMOVAL )

Fig 1: Identifying I20 And I8* Navigation Receiver Assembly Connectors Terminals

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR

Fig 2: AVC-LAN Wiring Diagram - w/o Rear Seat Entertainment System
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: AVC-LAN Wiring Diagram - w/ Rear Seat Entertainment System
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

For details of the connectors, refer to "Terminals of ECU" (See TERMINALS OF ECU ).
1. Referring to the AVC-LAN wiring diagram below, check all AVC-LAN circuits.
  1. Disconnect all connectors in all AVC-LAN circuits.
  2. Check for an open or short in all AVC-LAN circuits.
    OK: There is no open or short circuit.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )