DESCRIPTION
INSPECTION PROCEDURE
INSPECT RADIO RECEIVER
CHECK HARNESS AND CONNECTOR
NAVIGATION SYSTEM - AVC-LAN Circuit
DESCRIPTION
Each unit of the navigation system connected to the AVC-LAN (communication bus) transfers the signal of each switch by communication.
When a short to +B or short to ground occurs in this AVC-LAN, the navigation system will not function normally as the communication is discontinued.
INSPECTION PROCEDURE
Disconnect the radio receiver connectors.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
| Tester Connection | Condition | Specified Condition |
ATX+ (J66-5) -
ATX- (J66-15) | Always | 60 to 80 Ω |
TX+ (J63-9) -
TX- (J63-10) | Always | 60 to 80 Ω |
| 2.CHECK HARNESS AND CONNECTOR |
- For details of the connectors, refer to "TERMINALS OF ECU" .
Referring to the AVC-LAN wiring diagram below, check all AVC-LAN circuits.
Disconnect all connectors in all AVC-LAN circuits.
Check for an open or short in all AVC-LAN circuits.
- OK:
- There is no open or short circuit.
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| OK | |
| |
| PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE |
|
LEXUS IS250, IS220d / GSE20 ALE20
