Page 897 of 2572

05-1818
- DIAGNOSTICSNAVIGATION SYSTEM
2008 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
GPS MARK IS NOT DISPLAYED
INSPECTION PROCEDURE
1 CHECK CABIN
(a) Check the cabin for any object that might interrupt radio reception on the instrument panel. If such an
object exists, remove it and check if the GPS mark appears.
HINT:
GPS works using extremely weak radio waves originating from satellites. If the signal is interrupted by ob-
structions or another radio wave, the GPS system may not be able to properly receive the signal.
OK: Mark appears.
OK NORMAL OPERATION
NG
2 CHECK SURROUNDINGS
(a) Check if the vehicle is in a location where GPS signal reception is bad. If the vehicle is in such a place,
move it elsewhere and check if the GPS mark appears.
HINT:
GPS uses 24 satellites in 6 orbits so that at any time 5 satellites will be in line-of-sight of your vehicle.
GPS signals may not be received, however, depending on surroundings, vehicle direction, and time.
05ISQ-02
Page 898 of 2572
I38586
In a tunnel In a building Under an overpass
Forest or tree-lined path Between tall buildings Under a cliff, overhang
I38226
- DIAGNOSTICSNAVIGATION SYSTEM
05-1819
2009 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
The following illustrations show some conditions where it may be difficult to receive GPS signals.
OK: GPS mark is displayed.
OK RETURNS TO NORMAL
NG
3 NAVIGATION CHECK MODE(GPS IMFORMATION)
(a) Enter the ºNavigation Checkº mode (GPS information) (see page 05-1764).
(b) Check how many of the following codes occur in the
ºSTSº column.
OK: At least 3 codes occur.
OK REPLACE NAVIGATION ECU
(SEE PAGE 67-9)
NG
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05-1778)
Page 899 of 2572
I39095
I39096
05-1820
- DIAGNOSTICSNAVIGATION SYSTEM
2010 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
VOICE GUIDANCE DOES NOT FUNCTION
INSPECTION PROCEDURE
1 CHECK NAVIGATION SYSTEM SETTING
(a) Enter the ºMENUº screen by pressing the ºMENUº switch.
(b) Enter the volume adjustment screen by pressing the ºVol-
umeº switch.
(c) Check that ºOFFº is not selected.
OK: OFF is not selected.
NG TURN VOICE GUIDANCE VOLUME UP TO 4
USING VOICE ADJUSTMENT SWITCHES
OK
05ISR-02
Page 900 of 2572
I39097
I39854
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- DIAGNOSTICSNAVIGATION SYSTEM
05-1821
2011 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
2 CHECK NAVIGATION SETTING
(a) Enter the ºMENUº screen by pressing the ºMENUº switch.
(b) Enter the ºSetupº screen by pressing the ºSetupº switch.
(c) Check that ºAuto Voice Guidanceº is not OFF.
OK: Auto voice guidance is not OFF.
(d) Check if ºVoice Guidance in All Modesº is ON.
OK: Voice guidance in all modes is ON.
NG TURN AUTO VOICE GUIDANCE TO ºONº
OK
3 CHECK THE MAP DISC
(a) Check that the map disc is not deformed or cracked.
OK: No deformations or cracks appear on the map
disc.
NG REPLACE THE MAP DISC
OK
Page 901 of 2572
05-1822
- DIAGNOSTICSNAVIGATION SYSTEM
2012 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
4 CHECK RADIO RECEIVER ASSY
(a) Check if audio sound can be heard from the driver's side speaker.
OK: Audio sound can be heard.
NG PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05-1778)
OK
REPLACE NAVIGATION ECU (SEE PAGE 67-9)
Page 902 of 2572
I38584
- DIAGNOSTICSNAVIGATION SYSTEM
05-1823
2013 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
MAP DISPLAY INCOMPLETE
INSPECTION PROCEDURE
1 CHECK THE MAP DISC
(a) Check that the map disc is not deformed or cracked.
OK: No deformations or cracks appear on the map
disc.
NG REPLACE THE MAP DISC
OK
2 CHECK THE DISPLAY
(a) Check that displays other than the navigation display are complete.
OK: No other incomplete displays are found.
OK REPLACE NAVIGATION ECU
(SEE PAGE 67-9)
NG
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05-1778)
05ISS-02
Page 903 of 2572
I38584
05-1824
- DIAGNOSTICSNAVIGATION SYSTEM
2014 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
ROUTE CANNOT BE CALCULATED
INSPECTION PROCEDURE
1 CHECK THE MAP DISC
(a) Check that the map disc is not deformed or cracked.
OK: No deformations or cracks appear on the map
disc.
NG REPLACE THE MAP DISC
OK
2 SET DESTINATION
(a) Set another destination and check if the system can calculate the route correctly.
OK: Route can be correctly calculated.
OK NORMAL OPERATION
NG
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05-1778)
05IST-02
Page 904 of 2572
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- DIAGNOSTICSNAVIGATION SYSTEM
05-1825
2015 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
GYRO ERROR
INSPECTION PROCEDURE
1 NAVIGATION CHECK MODE(VEHICLE SENSORS)
(a) Enter the ºNavigation Checkº mode (Vehicle Sensors) (see page 05-1765).
(b) Check the gyro voltage.
Standard: 0.1 to 4.5 V
NG REPLACE NAVIGATION ECU
(SEE PAGE 67-9)
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN DIAGNOSTIC TROUBLE CODE CHART
(SEE PAGE 05-1791)
05ISU-02