Inspection Procedure
- CHECK HARNESS AND CONNECTOR (NAVIGATION ECU - MULTI-DISPLAY CONTROLLER)
- Disconnect the navigation ECU connector N2 and multi-display controller connector R26.
- Measure the resistance according to the value(s) in the table below.
Resistance
TERMINALS RESISTANCE SPECIFICATIONTester connection Condition Specified Condition R - R Always Below 1 Ω G - G Always Below 1 Ω B - B Always Below 1 Ω SYNC - SYNC Always Below 1 Ω VR - VR Always Below 1 Ω R - Body ground Always 10 kΩ or higher G - Body ground Always 10 kΩ or higher B - Body ground Always 10 kΩ or higher SYNC - Body ground Always 10 kΩ or higher VR - Body ground Always 10 kΩ or higher Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to next step.
- INSPECT NAVIGATION ECU (OUTPUT SIGNAL)
- Reconnect the navigation ECU connector N2.
- Measure the waveform according to the table below.
OK
TESTER CONNECTION AND SPECIFIED CONDITIONTester connection Condition Specified Condition R - Body ground Navigation map is switched A waveform synchronized with display signals is output G - Body ground Navigation map is switched A waveform synchronized with display signals is output B - Body ground Navigation map is switched A waveform synchronized with display signals is output SYNC - Body ground Navigation display is ON A waveform synchronized with display signals is output Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
HINT:
The waveform pattern may differ from those shown in the illustrations below due to differences in oscilloscope setting. A normal navigation ECU operating condition can be determined if any waveform is output.
- Oscilloscope waveform
- Terminal: SYNC - Body ground
Setting: 500 mV/DIV 10 s/DIV
Condition: Navigation display is ON.
- Terminal: R, G, B - Body ground
Setting: 200 mV/DIV 10 s/DIV
Condition: Navigation map is switched.
- Terminal: SYNC - Body ground
NG: REPLACE NAVIGATION ECU
OK: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL