TOYOTA SEQUOIA 2001 Service Repair Manual

DIDBY±01
I28218
I28225
I28226 PKB OFF
REV OFFSPEED 49km/h
TAIL OFF
± DIAGNOSTICSNAVIGATION SYSTEM
DI±2179
2373 Author: Date:
2005 SEQUOIA (RM1146U)
DISPLAY CHECK MODE (Vehicle Signal Check)
HINT:

This mode checks the vehicle signal status input to the radio and navigation assy.

Illustrations may differ from the actual vehicle depending on the device settings and options. There-
fore, some detailed areas may not be shown exactly the same as on the actual vehicle.
1. Enter diagnostic mode (See page DI±2191).
2. Select ºDisplay Checkº from the ºDiagnosis MENUº
screen.
3. Select ºVehicle Signal Checkº from the ºDisplay
Checkº screen.
4. When the ºVehicle Signal Check Modeº screen is dis-
played, check all the vehicle signal conditions.
HINT:

Only conditions having inputs are displayed.

This screen is updated once per second when input sig-
nals to the vehicle are changed.

DIDBZ±01
I28227
I28228
I28229
DI±2180
± DIAGNOSTICSNAVIGATION SYSTEM
2374 Author: Date:
2005 SEQUOIA (RM1146U)
NAVIGATION CHECK MODE (GPS Information)
HINT:

This mode displays GPS satellite information.

Illustrations may differ from the actual vehicle depending on the device settings and options. There-
fore, some detailed areas may not be shown exactly the same as on the actual vehicle.
1. Enter diagnostic mode (See page DI±2191).
2. Select ºNavigation Checkº from the ºDiagnosis
MENUº screen.
3. Select ºGPS Informationº from the ºNavigation
Checkº screen.
4. When GPS information is displayed, check the GPS
conditions.
HINT:
This screen is updated once per second when input signals to
the vehicle are changed.

DIDC0±01
I28227
I28230
I28231
± DIAGNOSTICSNAVIGATION SYSTEM
DI±2181
2375 Author: Date:
2005 SEQUOIA (RM1146U)
NAVIGATION CHECK MODE (Vehicle Sensors)
HINT:

This mode checks the vehicle signal status input to the radio and navigation assy.

Illustrations may differ from the actual vehicle depending on the device settings and options. There-
fore, some detailed areas may not be shown exactly the same as on the actual vehicle.
1. Enter diagnostic mode (See page DI±2191).
2. Select ºNavigation Checkº from the ºDiagnosis
MENUº screen.
3. Select ºVehicle Sensorsº from the ºNavigation
Checkº screen.
4. Check all the signals and sensors when vehicle sig-
nal information is displayed.
HINT:
This screen is updated once per second when input signals to
the vehicle are changed.

DIDC1±01
I28227
I28232
I28233
DI±2182
± DIAGNOSTICSNAVIGATION SYSTEM
2376 Author: Date:
2005 SEQUOIA (RM1146U)
NAVIGATION CHECK MODE (Navi Color Bar Check)
HINT:

This mode checks the color display on the radio and navigation assy.

Illustrations may differ from the actual vehicle depending on the device settings and options. There-
fore, some detailed areas may not be shown exactly the same as on the actual vehicle.
1. Enter diagnostic mode (See page DI±2191).
2. Select ºNavigation Checkº from the ºDiagnosis
MENUº screen.
3. Select ºColor Bar Checkº from the ºNavigation
Checkº screen.
4. Check each color of the color bar when the ºNAVI Col-
or Bar Checkº screen is displayed.
HINT:
Colors will not be displayed full±screen as in ºDisplay Check
Modeº.

DIDC2±01
I28227
I28234
I28235
*1
*2
*3
*4
± DIAGNOSTICSNAVIGATION SYSTEM
DI±2183
2377 Author: Date:
2005 SEQUOIA (RM1146U)
NAVIGATION CHECK MODE (Parts Information)
HINT:

This mode displays product information on the radio and navigation assy and discs.

Illustrations may differ from the actual vehicle depending on the device settings and options. There-
fore, some detailed areas may not be shown exactly the same as on the actual vehicle.
1. Enter diagnostic mode (See page DI±2191).
2. Select ºNavigation Checkº from the ºDiagnosis
MENUº screen.
3. Select ºParts Informationº from the ºNavigation
Checkº screen.
4. Check the navigation and disc information when the
ºParts Informationº screen is displayed.
DisplayContents
Navigation Manufacturer/*1Radio and navigation assy manufacturer name is displayed.
Navigation Version/*2Radio and navigation assy version is displayed.
Disc Manufacturer/*3Map disc manufacturer is displayed.
Disc Version/*4Map disc version is displayed.

DIDC3±01
DI±2184
± DIAGNOSTICSNAVIGATION SYSTEM
2378 Author: Date:
2005 SEQUOIA (RM1146U)
PROBLEM SYMPTOMS TABLE
HINT:

Before performing verification listed in the table below, check the fuse and relay.

Methods used to verify the cause of the problem are listed in order of probability in the verification col-
umn.
Display function
SymptomVerificationSee page
Pressing PWR switch does not turn on system.
1. ºPRESSING POWER SWITCH DOES NOT TURN ON
SYSTEMº
2. Power source circuit (radio and navigation assy)
3. Replace radio and navigation assyDI±2213
DI±2256
±
Black screen (no image appears on navigation and audio screen).
1. ºBLACK SCREEN (NO IMAGE APPEARS ON NAV-
IGATION AND AUDIO SCREEN)º
2. Illumination circuit
3. Power source circuit (radio and navigation assy)
4. Replace radio and navigation assyDI±2214
DI±2260
DI±2256
±
Illumination for panel switch does not come on with TAIL switch
on.
1. ºILLUMINATION FOR PANEL SWITCH DOES NOT
COME ON WITH TAIL SWITCH ONº
2. Illumination circuit
3. Replace radio and navigation assyDI±2216
DI±2260
±
Display does not dim (night screen) with TAIL switch on.
1. ºDISPLAY DOES NOT DIM (NIGHT SCREEN) WITH
TAIL SWITCH ONº
2. Illumination circuit
3. Replace radio and navigation assyDI±2217
DI±2260
±
Power does not turn off (screen remains on).1. Power source circuit (radio and navigation assy)
2. Replace radio and navigation assyDI±2256
±
Panel switch does not function.
1. ºPANEL SWITCH DOES NOT FUNCTIONº
2. Steering pad switch circuit
3. Replace radio and navigation assyDI±2218
DI±2287
±
Touch panel switch does not function.
1. ºTOUCH PANEL SWITCH DOES NOT FUNCTIONº
2. Power source circuit (radio and navigation assy)
3. Replace radio and navigation assyDI±2219
DI±2256
±
Display panel does not open, tilt, or tilts improperly.
1. ºDISPLAY PANEL DOES NOT OPEN, TILT, OR TILTS
IMPROPERLYº
2. Power source circuit (radio and navigation assy)
3. Replace radio and navigation assyDI±2220
DI±2256
±
Screen is distorted.1. Power source circuit (radio and navigation assy)
2. Replace radio and navigation assyDI±2256
±
Screen flicker or color distortion.
1. ºSCREEN FLICKER OR COLOR DISTORTIONº
2. Power source circuit (radio and navigation assy)
3. Replace radio and navigation assyDI±2221
DI±2256
±
Audio function
SymptomVerificationSee page
No sound can be heard from speakers (audio is mute).
1. ºNO SOUND CAN BE HEARD FROM SPEAKERS
(AUDIO IS MUTE)º
2. Speaker circuit
3. AVC±LAN circuit (radio and navigation ± stereo compo-
nent amplifier)
4. Amplifier sound signal circuit
5. Amplifier mute signal circuit
6. Replace stereo component amplifier
7. Replace radio and navigation assyDI±2224
DI±2282
DI±2268
DI±2274
DI±2271
±
±

± DIAGNOSTICSNAVIGATION SYSTEM
DI±2185
2379 Author: Date:
2005 SEQUOIA (RM1146U) Radio broadcast cannot be received (poor reception).
1. ºRADIO BROADCAST CANNOT BE RECEIVED
(POOR RECEPTION)º
2. Replace radio and navigation assyDI±2225
±
CD cannot be inserted/played or CD is ejected right after inser-
tion.
1. ºCD CANNOT BE INSERTED/PLAYED OR CD IS
EJECTED RIGHT AFTER INSERTIONº
2. Power source circuit (radio and navigation assy)
3. Replace radio and navigation assyDI±2228
DI±2256
±
CD cannot be ejected.
1. ºCD CANNOT BE EJECTEDº
2. Power source circuit (radio and navigation assy)
3. Replace radio and navigation assyDI±2231
DI±2256
±
Abnormal noise occurs.
1. ºABNORMAL NOISE OCCURSº
2. Power source circuit (radio and navigation assy)
3. Replace radio and navigation assyDI±2233
DI±2256
±
CD sound skips.1. ºCD SOUND SKIPSº
2. Replace radio and navigation assyDI±2234
±
Poor sound quality in all modes (low volume).
1. ºPOOR SOUND QUALITY IN ALL MODES (LOW VOL-
UME)º
2. AMP mute signal circuit
3. Replace radio and navigation assy
4. Replace stereo component amplifierDI±2236
DI±2271
±
±
Navigation function
SymptomVerificationSee page
Map disc cannot be inserted.
1. ºMAP DISC CANNOT BE INSERTEDº
2. Power source circuit (radio and navigation assy)
3. Replace radio and navigation assyDI±2237
DI±2256
±
Map disc cannot be ejected.
1. ºMAP DISC CANNOT BE EJECTEDº
2. Power source circuit (radio and navigation assy)
3. Replace radio and navigation assyDI±2238
DI±2256
±
Vehicle position mark deviates greatly.
1. ºVEHICLE POSITION MARK DEVIATES GREATLYº
2. Replace GPS antenna assy
3. Replace radio and navigation assyDI±2239
±
±
Cursor or map rotates when vehicle is stopped.
1. ºCURSOR OR MAP ROTATES WHEN VEHICLE IS
STOPPEDº
2. Replace radio and navigation assyDI±2241
±
Vehicle position mark is not updated.
1. ºVEHICLE POSITION MARK IS NOT UPDATEDº
2. Replace map disc
3. Replace radio and navigation assyDI±2242
±
±
Current position display does not appear.
1. ºCURRENT POSITION DISPLAY DOES NOT AP-
PEARº
2. Replace map disc
3. Replace radio and navigation assyDI±2244
±
±
GPS mark does not displayed.
1. ºGPS MARK IS NOT DISPLAYEDº
2. Replace GPS antenna assy
3. Replace radio and navigation assyDI±2245
±
±
Voice guidance does not function.
1. ºVOICE GUIDANCE DOES NOT FUNCTIONº
2. Speaker circuit
3. Replace map disc
4. Replace radio and navigation assyDI±2248
DI±2282
±
±

DI±2186
± DIAGNOSTICSNAVIGATION SYSTEM
2380 Author: Date:
2005 SEQUOIA (RM1146U) Map display incomplete.
1. ºMAP DISPLAY INCOMPLETEº
2. Replace map disc
3. Replace radio and navigation assyDI±2251
±
±
Route cannot be calculated.
1. ºROUTE CANNOT BE CALCULATEDº
2. Replace map disc
3. Replace radio and navigation assyDI±2252
±
±
Steering pad switch assy function
SymptomVerificationSee page
The system cannot be operated by the steering pad switch.1. Steering pad switch circuit
2. Replace radio and navigation assyDI±2287
±
Illumination for steering pad switch does not come on with TAIL
switch on.1. Steering pad switch circuit
2. Replace radio and navigation assyDI±2287
±

DIDC4±01
I28763
R27
R29R30
R26R28
± DIAGNOSTICSNAVIGATION SYSTEM
DI±2187
2381 Author: Date:
2005 SEQUOIA (RM1146U)
TERMINALS OF ECU
1. RADIO AND NAVIGATION ASSY
Symbols (Terminal No.)Wiring ColorTerminal DescriptionConditionSpecification
ACC (R30±11) ±
GND (R30±20)GR ± BRAccessory (ON)Ignition switch OFF
"ACC or ONBelow 1 V "10 to 14 V
B (R30±1) ± GND (R30±20)L±Y ± BRBatteryAlways10 to 14 V
GND (R30±20) ± Body groundBR ±
Body groundGroundAlwaysBelow 1 V
ANT (R30±13) ±
GND (R30±20)B±R ± BRPower source of antennaRadio switch ON and AM or FM10 to 14 V
ILL+ (R30±2) ± ILL± (R30±12)G ± W±GIllumination signal
Ignition switch ON
Light control switch OFF "TAIL or
ONBelow 1 V "
10 to 14 V
R+ (R30±8) ± GND (R30±20)W ± BRSound signal (Right)Audio system is playing
A waveform synchro-
nized with sound is out-
put
L+ (R30±9) ± GND (R30±20)B ± BRSound signal (Left)Audio system is playing
A waveform synchro-
nized with sound is out-
put
R± (R30±18) ± GND (R30±20)G ± BRSound signal (Right)Audio system is playing
A waveform synchro-
nized with sound is out-
put
L± (R30±19) ± GND (R30±20)R ± BRSound signal (Left)Audio system is playing
A waveform synchro-
nized with sound is out-
put
SWG (R27±6) ± Body groundBR±W ±
Body groundSteering pad switch
groundAlwaysBelow 1 V
SW1 (R27±7) ± SWG (R27±6)LG±R ± BR±WSteering pad switch signal
Steering pad switch not operated
"SEEK+ switch pushed
"SEEK± switch pushed
"VOL+ switch pushed
"VOL± switch pushed4 V or more
"Approx. 0.5 V
"Approx. 0.9 V
"Approx. 2.0 V
"Approx. 3.4 V

DI±2188
± DIAGNOSTICSNAVIGATION SYSTEM
2382 Author: Date:
2005 SEQUOIA (RM1146U) SW2 (R27±8) ± SWG (R27±6)
GR±R ± BR±WSteering pad switch signalSteering pad switch not operated
"MODE switch pushed4 V or more
"Below 2.5 V
SPD (R29±3) ± GND (R30±20)G±O ± BRSpeed signal from com-
bination meterSee ºVehicle Signal Check Modeº
(See page DI±2179)±
REV (R29±5) ± GND (R30±20)B±Y ± BRReverse signal from com-
bination meterSee ºVehicle Signal Check Modeº
(See page DI±2179)±
MUTE (R28±7) ±
GND (R30±20)R±W ± BRMUTE signal
(From navigation)Audio system is playing " chang-
ing modeAbove 3.5 V "
Below 1 V
SLD (R30±10) ± Body groundShielded ±
Body groundShield groundAlwaysBelow 1 V
SWG (R27±6) ± Body groundBR±W ±
Body groundSteering pad switch
groundAlwaysBelow 1 V
ATX+ (R30±5) ± GND (R30±20)V ± BRAVC±LAN
communication signalIgnition switch ON2 to 3 V
ATX± (R30±15) ±
GND (R30±20)P ± BRAVC±LAN
communication signalIgnition switch ON2 to 3 V
IVO+ (R27±11) ±
GND (R30±20)W ± BRVoice guidance output
signalNavigation system is voice guid-
ance outputA waveform synchro-
nized with sound is out-
put
IVO± (R27±12) ±
GND (R30±20)B ± BRVoice guidance output
signalNavigation system is voice guid-
ance outputA waveform synchro-
nized with sound is out-
put
SLD1 (R27±13) ± Body groundShielded ±
Body groundShield groundAlwaysBelow 1 V
PKB (R29±1) ± GND (R30±20)LG±R ± BRParking brake switch sig-
nalParking brake pedal is depress "Below 1 V "
10 to 14 V
(*1) NTSC (R26±1) ±
GND (R30±20)R ± BRDisplay signal (From mul-
ti±display controller)Navigation display is ONPulse generation
(*1) SGD1 (R26±4) ±
Body groundG ± Body groundGroundAlwaysBelow 1 V
(*1) SGND (R26±5) ±
Body groundShielded ±
Body groundShield groundAlwaysBelow 1 V
(*1, 2) TX+ (R27±9) ±
GND (R30±20)L ± BRAVC±LAN
communication signalIgnition switch ON2 to 3 V
(*1, 2) TX± (R27±10) ±
GND (R30±20)LG ± BRAVC±LAN
communication signalIgnition switch ON2 to 3 V
(*1, 2) R±R+ (R27±15) ±
GND (R30±20)W ± BRSound signal
(Right output)Audio system is playing
A waveform synchro-
nized with sound is out-
put
(*1, 2) R±R± (R27±16) ±
GND (R30±20)G ± BRSound signal
(Right output)Audio system is playing
A waveform synchro-
nized with sound is out-
put
(*1, 2) R±L+ (R27±17) ±
GND (R30±20)B ± BRSound signal (Left output)Audio system is playing
A waveform synchro-
nized with sound is out-
put
(*1, 2) R±L± (R27±18) ±
GND (R30±20)R ± BRSound signal (Left output)Audio system is playing
A waveform synchro-
nized with sound is out-
put
(*1) RSLD (R27±14) ±
Body groundShielded ±
Body groundShield groundAlwaysBelow 1 V
(*1, 2) RMUT (R27±19) ±
GND (R30±20)R±W ± BRMUTE signal (To multi±
display controller)Audio system is playing " chang-
ing modeAbove 3.5 V "
Below 1 V
(*1) CDR+ (R28±2) ±
GND (R30±20)W ± BRSound signal (Right input)Rear seat entertainment system is
playingA waveform synchro-
nized with sound is out-
put