Inspection Procedure
WARNING: This page is about a different car, the 2004 Lexus GS 430 and 2004 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
- Service check mode. (Check the navigation ECU)
- NG:Troubleshoot for each diagnosis.
- OK: Replace multi display.
Ncon
- Check the navigation ECU.
PREPARATION:
Disconnect the navigation ECU connector.
CHECK:
Check voltage terminals +B.
OK:
+B: 10-14 V
CHECK:
Check voltage terminal ACC when turn ignition switch ACC or ON position.
OK:
ACC: 10-14 V
CHECK:
Check continuity terminal GND1.
OK:
GND1: Continuity
- NG:Replace or repair wire harness or connector.
- OK: Go to Next Step
- Check the navigation ECU.
CHECK:
Check terminal R, G and B.
OK:
R, G, B: See TERMINALS OF ECU .
- NG:Replace the navigation ECU.
- OK:Go to Next Step
- Check the multi display.
PREPARATION:
Disconnect the multi display connector.
CHECK:
Check voltage terminals +B.
OK:
+B: 10-14 V
CHECK:
Check voltage terminal ACC when turn ignition switch ACC or ON position.
OK:
ACC: 10 - 14 V
CHECK:
Check continuity terminal GND1.
OK:
GND1: Continuity
- NG: Replace or repair wire harness or connector.
- OK: Go to Next Step
- Check the multi display.
CHECK:
Check terminal R, G and B.
OK:
R, G, B: See TERMINALS OF ECU .
- NG: Replace or repair wire harness or connector.
- OK:
Replace multi display.