ad blue TOYOTA PRIUS 2001 Service User Guide

I17098
Navigation check
screen switch
DI±806
± DIAGNOSTICSNAVIGATION SYSTEM
2001 PRIUS (RM778U)
(d) COLOR BAR CHECK MODE SCREEN
(1) Color display of the Navigation ECU is checked in this screen.
(2) Color Bars:
Five colors of ºBLACKº, ºREDº, ºGREENº, ºBLUEº and ºWHITEº are displayed as bars.
(3) Navigation Check Screen Switch
Pressing this switch displays the Navigation Check screen.

I15456
to Display
check screen switch
± DIAGNOSTICSNAVIGATION SYSTEM
DI±809
2001 PRIUS (RM778U)
(b) COLOR BAR CHECK MODE SCREEN
(1) Color display is checked in this screen.
(2) Color Bar:
Black, Red, Green, Blue, White and Stripe is displayed in bars.
If a bar is touched, color or stripe of the bar is appeared all over the screen. When touched again, it returns
to the previous screen.
(3) Display Check Screen Switch
Pressing this switch activates the Display Check Mode screen.

DI7OT±01
I15528
M5
M6M7
DI±820
± DIAGNOSTICSNAVIGATION SYSTEM
2001 PRIUS (RM778U)
TERMINALS OF ECU
MULTI DISPLAY
SymbolsC ditiSTD V lt (V)
Problem symptom when
open circuit is detected.
Symbols
(Terminals NO. )ConditionSTD Voltage (V)Problem symptom when
short circuit is detected.
TX+ (M5±3)Ignition switch
ACC or ONAbout 2.5 V Screen is in disorder.
TX3+ (M5±4)Ignition switch
ACC or ONAbout 2.5 V Screen is in disorder.
SPD ± GND
(M5±5 ± M7±6)Ignition switch ON, and driving
wheel rotated slowlyRepeatedly changes from below 1
to 9 VFuel efficiency cannot be calcu-
lated.
TX± (M5±10)Ignition switch
ACC or ONAbout 2.5 V Screen is in disorder.
TX3± (M5±11)Ignition switch
ACC or ONAbout 2.5 V Screen is in disorder.
PKB ± GND
(M5±13 ± M7±6)Parking brake switch ON (parking
brake lever released)5 V The system cannot enter Diagno-
sis System mode.
TC ± GNDIgnition switch OFF and connectContinuityNavigation system is normal.TC ± GND
(M5±14 ± M7±6)
Ignition switch OFF and connect
thermals TC and E1 of diagnosis
check connector
Continuity
The system cannot exit Service
Check mode.
VR ± VG
(M6±1 ± M6±6)ConstantContinuityScreen noise or other types of
noise occur.
R ± VG
(M6±2 ± M6±6)Diagnosis display check screen is
white (Using an oscilloscope)0.7 V ± 0.1 V *2Screen color turns to blue.
B ± VG
(M6±3 ± M6±6)Diagnosis display check screen is
white (Using an oscilloscope)0.7 V ± 0.1 V *2Screen color turns to yellow.
TX1+ (M6±5)AVC±LAN
communication circuit±Navigation system does not oper-
ate.
VG ± GND
(M6±6 ± M7±6)
ConstantContinuityScreen noise or other types of
noise occur.
(M6±6 ± M7±6)
Navigation system does not op-
eration.
G ± VG
(M6±7 ± M6±6)Diagnosis display check screen is
white (Using an oscilloscope)0.7 V ± 0.1 V *2Screen color turns to red±purple.

I15499
N2
N3
DI±822
± DIAGNOSTICSNAVIGATION SYSTEM
2001 PRIUS (RM778U)
NAVIGATION ECU
SymbolsC ditiSTD V lt (V)
Problem symptom when
open circuit is detected.
Symbols
(Terminals NO. )ConditionSTD Voltage (V)Problem symptom when
short circuit is detected.
AUI+ ± GND
(N2±1 ± N2±17)Radio switch ON5 ± 7 VDriver's side speaker does not
sound.
AUO+ ± GND
(N2±2 ± N2±17)Radio switch ON5 ± 7 VDriver's side speaker does not
sound.
SPD ± GND
(N2±5 ± N2±17)Ignition switch ON and driving
wheel rotated slowlyRepeatedly changes from below 1
to 9 VNavigation operation is available
during, or a cursor on present site
does not move.
+B ± GND
(N2±9 ± N2±17)Constant10 ± 14 VThe set route can not be memo-
rized. (The route disappears by
turning the ignition switch OFF.)
Fuse is blown.
AUI± ± GND
(N2±10 ± N2±17)Radio switch ON5 ± 7 VDriver's side speaker does not
sound.
AUO± ± GND
(N2±11 ± N2±17)Radio switch ON5 ± 7 VDriver's side speaker does not
sound.
REV ± GND
(N2±14 ± N2±17)A/T shift position R5 VThe direction of advance of the ve-
hicle is different from that of the
cursor.
GND ± Body ground
(N2±17 ± Body ground)ConstantBelow 1 VAudio system is normal.
ACC ± GND
(N2±18 ± N2±17)Ignition switch ACC or ON10 ± 14 VAudio system does not sound.
VR ± VG
(N3±1 ± N3±6)
ConstantContinuityScreen noise or other types of
noise occur.
(N3±1 ± N3±6)
Navigation system does not op-
eration.
R ± VG
(N3±2 ± N3±6)Diagnosis display check screen is
white (Using an oscilloscope)0.7 V ± 0.1 V*1Screen color turns to blue.

± 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

EM2534
Overall Length
A01073
45° Carbide
CutterResiduary
Width
Resurface
A01074
Width
EM0185
45°20°
1.0 ± 1.4 mm
EM0186
75°
1.0 ± 1.4 mm45°
EM±36
± ENGINE MECHANICALCYLINDER HEAD
2001 PRIUS (RM778U)
(d) Check the valve overall length.
Standard overall length:
Intake 89.25 mm (3.5138 in.)
Exhaust 87.90 mm (3.4606 in.)
Minimum overall length:
Intake 88.95 mm (3.5020 in.)
Exhaust 87.60 mm (3.4488 in.)
If the overall length is less than minimum, replace the valve.
(e) Check the surface of the valve stem tip for wear.
If the valve stem tip is worn, replace the valve.
11. INSPECT AND CLEAN VALVE SEATS
(a) Using a 45° carbide cutter, resurface the valve seats.
Remove only enough metal to clean the seats.
(b) Check the valve seating position.
Apply a light coat of prussian blue (or white lead) to the
valve face. Lightly press the valve against the seat. Do not
rotate valve.
(c) Check the valve face and seat for the following:

If blue appears 360° around the face, the valve is
concentric. If not, replace the valve.

If blue appears 360° around the valve seat, the
guide and face are concentric. If not, resurface the
seat.

Check that the seat contact is in the middle of the
valve face with the following width:
1.0 ± 1.4 mm (0.039 ± 0.055 in.)
If not, correct the valve seats as follows:
(1) If the seating is too high on the valve face, use 20°
and 45° cutters to correct the seat.
(2) If the seating is too low on the valve face, use 75°
and 45° cutters to correct the seat.