2001 TOYOTA PRIUS Service Repair Manual

DI±842
± DIAGNOSTICSNAVIGATION SYSTEM
2001 PRIUS (RM778U)
12. Map DISC cannot be inserted.
INSPECTION PROCEDURE
1 Check the MAP DISC.
NG Replace the MAP DISC.
OK
2 Insert a MAP DISC without tilt.
OK Normal.
NG
3 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 GND.
OK:
GND: Continuity
NG Replace or repair wire harness.
OK
DI7P5±01

± DIAGNOSTICSNAVIGATION SYSTEM
DI±843
2001 PRIUS (RM778U)
Replace the navigation ECU.

DI±846
± DIAGNOSTICSNAVIGATION SYSTEM
2001 PRIUS (RM778U)
15. Navigation screen cannot change to the night mode color.
INSPECTION PROCEDURE
1 Check the setting. (Is it set to Day Mode in screen adjustment?)
Yes Normal.
No
2 Check if the screen is dimmed at night. (With the light control switch ON, do all
screens except the navigation screen appear in Night Mode?)
NG Go to step 5.
OK
3 Does the beep sound by operating switches on the navigation screen?
OK Replace the navigation ECU.
NG
4 Check ºAVC±LAN communication circuitº (See page DI±860).
NG Replace or repair AVC±LAN circuit.
OK
Replace the navigation ECU.
DI7P8±01

± DIAGNOSTICSNAVIGATION SYSTEM
DI±847
2001 PRIUS (RM778U)
5 Check the multi display.
CHECK:
Check terminal TAIL.
OK:
TAIL: See ºMulti Displayº of ºTERMINAL OF ECUº.
OK Replace the multi display.
NG
Replace or repair wire harness.

± DIAGNOSTICSNAVIGATION SYSTEM
DI±849
2001 PRIUS (RM778U)
17. Vehicle position is deviated from correct point badly.
INSPECTION PROCEDURE
1 Check the mark display. (At a place with a fine view, is GPS mark displayed or
not?)
No Go to step 7.
Ye s
2 Does the trouble occur in the specific area or not?
Yes Normal. (If the vehicle is positioned in the place
where it is difficult to be identified, the current
vehicle position may be incorrectly displayed.)
No
3 Check the setting (Color of the automatic calibration button on the calibration
screen).
Green Normal. (Drive the vehicle (10 km or more) until
calibration is completed.
Blue
4 Service check mode. (Is º58±43º displayed in the unit check mode of the navigation
ECU?)
Yes Troubleshoot for each diagnosis.
No
DI7PA±01

DI±850
± DIAGNOSTICSNAVIGATION SYSTEM
2001 PRIUS (RM778U)
5 Navigation check mode (vehicle signal check mode: SPD).
NG Replace or repair speed sensor wire harness.
OK
6 Recurrence Test (Confirm the phenomenon) (Correct the current position and
drive the vehicle for a while with the GPS mark displayed).
OK Normal.
NG
Replace the navigation ECU.
7 Check if the harness is caught or sharply bent or not.
NG Navigation antenna is surely connected.
OK
8 Check optional components. (Does it become if the optionals such as the theft
deterrent system is removed?)
Yes Remove or change the position of the compo-
nents.
HINT:
Some optionals receive radio signals, and if this happens, GPS
reception may be affected.
No

± DIAGNOSTICSNAVIGATION SYSTEM
DI±851
2001 PRIUS (RM778U)
9 Is there anything such as a film stuck to the window?
Yes Reception may be affected by a screen such as
a film.
No
10 Service check mode. (Is º80±40, 41º is displayed in the unit check mode of the
navigation ECU?)
Yes Troubleshoot for each diagnosis.
No
Replace the navigation antenna.
HINT:
If the trouble still occurs, replace the navigation ECU.