Inspection Procedure
WARNING: This page is about a different car, the 2006 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK HARNESS AND CONNECTOR (NAVIGATION ECU - MULTI-DISPLAY)
- Disconnect the navigation ECU connector M17 and multi-display connector E8.
- Measure the resistance according to the value(s) in the table below.STANDARD RESISTANCE SPECIFIED CONDITION
Tester connection Condition Specified condition R - R Always Below 1 G - G Always Below 1 B - B Always Below 1 SYNC - SYNC Always Below 1 VR - VR Always Below 1 VG - VG Always Below 1 R - Body ground Always 10 k or higher G - Body ground Always 10 k or higher B - Body ground Always 10 k or higher SYNC - Body ground Always 10 k or higher VR - Body ground Always 10 k or higher VG - Body ground Always 10 k or higher
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: GO TO NEXT STEP
- INSPECT NAVIGATION ECU (OUTPUT SIGNAL)
- Reconnect the navigation ECU connector M17.
- Measure the waveform according to the table below.STANDARD SPECIFIED CONDITION
Tester connection Condition Specified condition R - Body ground Navigation display is ON. A waveform synchronized with display signals is output. G - Body ground Navigation display is ON. A waveform synchronized with display signals is output. B - Body ground Navigation display is ON. A waveform synchronized with display signals is output. SYNC - Body ground Navigation display is ON. A waveform synchronized with display signals is output. HINT:
- If SYNC signals are not being input to the multidisplay due to an open circuit or other causes, the green initial screen may seem pinkish-green.
- The waveform pattern may differ from those shown in Fig 3and Fig 4 due to differences in oscilloscope settings. A normal navigation ECU operating condition can be determined if any waveform is output.
NG: REPLACE NAVIGATION ECU
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE