2001 TOYOTA PRIUS navigation

DI±834
± DIAGNOSTICSNAVIGATION SYSTEM
2001 PRIUS (RM778U)
OK
Replace the multi display.

DI±836
± DIAGNOSTICSNAVIGATION SYSTEM
2001 PRIUS (RM778U)
8. Color on navigation screen is unusual (RGB signal error).
INSPECTION PROCEDURE
1 Display check mode (Color bar check).
NG Replace the multi display.
2 Navigation check mode (Color bar check).
NG Go to step 4.
OK
3 Check the screen setting. (Day or Night mode)
OK Normal.
NG
4 Check the navigation ECU.
CHECK:
Check terminals +B.
OK:
+B: 10 ± 14 V
CHECK:
Check terminal ACC when turn ignition switch ACC or ON position.
OK:
ACC: 10 ± 14 V
CHECK:
Check terminal R, G, B, VR or VG.
OK:
R, G, B, VR or VG: See ºNavigation ECUº of ºTERMINAL OF ECUº
NG Replace the wire harness when all terminals are
faulty. Replace the wire harness when SYNC ter-
minal is faulty.
DI7P1±01

± DIAGNOSTICSNAVIGATION SYSTEM
DI±837
2001 PRIUS (RM778U)
OK
Replace the multi display.

DI±840
± DIAGNOSTICSNAVIGATION SYSTEM
2001 PRIUS (RM778U)
11. No sound (radio, cassette tape, CD) can be heard from driver
side door speaker only.
INSPECTION PROCEDURE
1 Service check mode.
NG Troubleshoot for each diagnosis.
OK
2 Check wire harness (between navigation ECU and radio receiver assembly).
PREPARATION:
Disconnect the navigation ECU and radio receiver assembly connector.
CHECK:
(a) Check continuity between terminal AUI+ of navigation ECU connector and terminal FL+ of radio receiv-
er assembly.
(b) Check continuity between terminal AUI± of navigation ECU connector and terminal FL± of radio receiv-
er assembly.
OK:
Continuity
NG Replace or repair wire harness.
OK
3 Check the navigation system voice.
OK Go to step 6.
NG
DI7P4±01

± DIAGNOSTICSNAVIGATION SYSTEM
DI±841
2001 PRIUS (RM778U)
4 Check wire harness (between navigation ECU and driver side door speaker).
PREPARATION:
Disconnect the navigation ECU and driver side door speaker connector.
CHECK:
(a) Check continuity between terminal AUO+ of navigation ECU connector and terminal 1 of driver side
door speaker.
(b) Check continuity between terminal AUO± of navigation ECU connector and terminal 2 of driver side
door speaker.
OK:
Continuity
NG Replace or repair wire harness.
OK
5 Check the driver side door speaker.
NG Replace the speaker.
OK
Replace the navigation ECU.
6 Check the navigation ECU.
CHECK:
Check terminal AUO+, AUO±, AUI+ and AUI±.
OK:
AUO+, AUO±, AUI+ and AUI±: See ºNavigation ECUº of ºTERMINAL OF ECUº.
NG Replace the navigation ECU.
OK
Replace the radio receiver assembly.

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