TOYOTA SEQUOIA 2001 Service Repair Manual

± DIAGNOSTICSCOMBINATION METER SYSTEM
DI±1659
1853 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 when using the hand±held tester and start from step 2 when not using the
hand±held tester.
1 Perform active test by hand±held tester.
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON, and push the hand±held tester main switch ON.
CHECK:
From the display on the tester, perform the ºACTIVE TESTº.
METER:
ItemTest DetailsDiagnostic Note
VOLT METER9 V / 12 V / 15 V / 18VConfirm that the vehicle is stopped and engine is
idling.
OK:
Volt meter readings change according to hand±held tester operation.
NG Replace combination meter
(See page IN±35).
OK
2 Check fuse.
CHECK:
Measure the resistance of the IGN1 fuse in the instrument panel J/B.
OK:
Below 1 W
CHECK:
Measure the resistance of the AM2 fuse in the engine room J/B.
OK:
Below 1 W
NG Inspect for short circuit in harness and all com-
ponents connected to fuse.
OK

I28570C6±24
DI±1660
± DIAGNOSTICSCOMBINATION METER SYSTEM
1854 Author: Date:
2005 SEQUOIA (RM1146U)
3 Inspect combination meter.
PREPARATION:
Disconnect the C6 connector of the combination meter.
CHECK:
Measure the voltage according to the value(s) in the table be-
low.
OK:
Terminal NoConditionSpecified condition
C6±24 ± Body groundIgnition switch ON10 to 14 V
NG Repair or replace harness or connector.
OK
Replace combination meter
(See page IN±35).

DID64±01
± DIAGNOSTICSSLIDING ROOF SYSTEM
DI±1661
1855 Author: Date:
2005 SEQUOIA (RM1146U)
SLIDING ROOF SYSTEM
PRECAUTION
NOTICE:
When disconnecting the battery terminal, initialize the following system after the terminal is recon-
nected.
System NameSee Page
Back Door Power Window Control SystemBE±77

DI272±11
Customer Problem Analysis
Vehicle Brought to Workshop
Problem Symptom ConfirmationSymptom Simulation Symptom does not occur
Problem Symptom Table
Circuit Inspection
Identification of Problem
Repair
Confirmation Test
EndTitles inside
are titles of pages in this
manual with the page number indicated in the
bottom portion. See the indicated pages
for detailed explanations. 1
23
5
6
8Step 6, 8 : Diagnostic steps permitting the use
of the hand±held tester. P. DI±1663
P. DI±1664
P. IN±24
P. DI±1668 ± DI±1675
Symptom occurs
7
Multiplex Communication System Inspection * 4
P. DI±1904
*: Confirm that there is no trouble by DTC check. DI±1662
± DIAGNOSTICSSLIDING ROOF SYSTEM
1856 Author: Date:
2005 SEQUOIA (RM1146U)
HOW TO PROCEED WITH TROUBLESHOOTING
HINT:
The ECU of this system is connected to the multiplex communication system. Therefore, before starting trou-
bleshooting, make sure to check that there is no trouble in the multiplex communication system.

DI273±05
± DIAGNOSTICSSLIDING ROOF SYSTEM
DI±1663
1857 Author: Date:
2005 SEQUOIA (RM1146U)
CUSTOMER PROBLEM ANALYSIS CHECK
SLIDING ROOF CONTROL SYSTEM Check Sheet
Inspector 's name:
Customer 's Name
Date of VehicleVIN
Production Date
Licence Plate No.
Odometer Reading / /km
mile
Weather Conditions
When Problem
Occurred Frequency Problem OccursWeather
Outdoor temperature
/ /

Constant
Sometimes ( Times per day, month)

Once only Brought in

Sliding roof control system does not operate.
Date Problem First Occurred

Fine
Cloudy
Rainy
Snowy

Various/Others

Hot
Warm
Cool

Cold (Approx. 5F ( 5C))
Problem
Symptom

Sliding roof operates abnormally or stops half way.

Jam protection system does not operate.

DI276±09
DI±1664
± DIAGNOSTICSSLIDING ROOF SYSTEM
1858 Author: Date:
2005 SEQUOIA (RM1146U)
PROBLEM SYMPTOMS TABLE
SymptomSuspect AreaSee page
Sliding roof control system does not operate.
1. SUN ROOF Fuse
2. ECU±IG Fuse
3. Power Source Circuit
4. Sliding Roof Control Switch CircuitBE±14
BE±14
DI±1668
DI±1671
Sliding roof operates abnormally or stops half way.Sliding Roof Pulse Plate CircuitDI±1675
Jam protection system does not operate.Sliding Roof Pulse Plate CircuitDI±1675

DI275±12
I04611
S19
± DIAGNOSTICSSLIDING ROOF SYSTEM
DI±1665
1859 Author: Date:
2005 SEQUOIA (RM1146U)
TERMINALS OF ECU
Symbols (Terminals No.)Wiring ColorConditionSpecified Condition
MPX1 e ± (S19 ± 2 e ±)G±O e ±Multiplex communication circuit±
DWN e E
(S19 ± 3 e S19 ± 7)R±W e W±BIgnition switch ON " Sliding roof control switch TILT DOWN10 to 14 V "
Below 1 V
UP e E
(S19 ± 4 e S19 ± 7)R±Y e W±BIgnition switch ON " Sliding roof control switch TILT UP10 to 14 V "
Below 1 V
B e E
(S19 ± 5 e S19 ± 7)L±W e W±BAlways10 to 14 V
E e Body ground
(S19 ± 7 e Body ground)W±B e Body
groundAlwaysBelow 1 V
IG e E
(S19 ± 8 e S19 ± 7)B±R e W±BIgnition switch ON " Ignition switch OFF or ACC10 to 14 V "
Below 1 V
OPN e E
(S19 ± 9 e S19 ± 7)P±B e W±BIgnition switch ON " Sliding roof control switch OPEN10 to 14 V "
Below 1 V
CLS e E
(S19 ± 10 e S19 ± 7)G±Y e W±BIgnition switch ON " Sliding roof control switch CLOSE10 to 14 V "
Below 1 V

DID4Z±01
DI±1666
± DIAGNOSTICSSLIDING ROOF SYSTEM
1860 Author: Date:
2005 SEQUOIA (RM1146U)
DATA LIST / ACTIVE TEST
1. DATA LIST
HINT:
According to the DATA LIST displayed by the hand±held tester, you can read the value of the switch, sensor,
actuator and so on without parts removal. Reading the DATA LIST as a first step of troubleshooting is one
of the method to shorten the labor time.
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON.
(c) According to the display on tester, read the ºDATA LISTº.
SLIDE ROOF:
ItemMeasurement Item/
Display (Range)Normal conditionDiagnostic Note
LIMIT SW 1Position SW NO.1/
ON or OFFON: 250 mm point from fully opened position
OFF: Sliding roof fully closed position±
LIMIT SW 2Position SW NO.2/
ON or OFFON: Sliding roof fully closed position
OFF: Sliding roof except fully closed position±
OPEN SWSliding roof open SW
signal/ON or OFFON: Sliding roof is open
OFF: Sliding roof is close±
CLOSE SWSliding roof close SW
signal/ON or OFFON: Sliding roof is close
OFF: Sliding roof is open±
UP SWSliding roof up SW sig-
nal/ON or OFFON: Sliding roof is up
OFF: Sliding roof is down±
DOWN SWSliding roof down SW
signal/ON or OFFON: Sliding roof is down
OFF: Sliding roof is up±
IG (DIRCT)Ignition SW (Direct
signal)/ON or OFFON: Ignition switch to on
OFF: Ignition switch to off±
IG (MPX)Ignition SW (MPX)/ON
or OFFON: Ignition switch to on
OFF: Ignition switch to off±
2. ACTIVE TEST
HINT:
Performing the ACTIVE TEST using the hand±held tester allows the relay, VSV, actuator and so on to oper-
ate without parts removal. Performing the ACTIVE TEST as a first step of troubleshooting is one of the meth-
od to shorten the labor time.
It is possible to display the DATA LIST during the ACTIVE TEST.
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON.
(c) According to the display on tester, perform the ºACTIVE TESTº.
SLIDE ROOF:
ItemTest DetailsDiagnostic Note
SLIDE ROOFSliding roof CLOS/UP ± OPN/DWNDuring this ACTIVE TEST, jam protection caught
detection can be monitored.

DI274±08
I28411
Ignition Switch Instrument Panel J/B

ECU±IG Fuse

SUN ROOF Fuse
Sliding Roof Gear Assembly

Sliding Roof ECU

Sliding Roof Motor
Sliding Roof Control Switch
± DIAGNOSTICSSLIDING ROOF SYSTEM
DI±1667
1861 Author: Date:
2005 SEQUOIA (RM1146U)
PARTS LOCATION

DI277±14
I18700
J8
J/CB±R
2
L±WIG Instrument Panel J/B I18
Ignition SW
1IG1
AM1 B±Y4
1C
6
1CAM1
1 2ECU±IG
SUN ROOF1
1M
5
1M
1
1L8
5
B
W±L
B58 ALT F10
Fusible Link Block
W
Instrument Panel J/B
W±BW±B 7
1M 10
1F
IE Battery7
AS19
Sliding Roof
Control ECU
E DI±1668
± DIAGNOSTICSSLIDING ROOF SYSTEM
1862 Author: Date:
2005 SEQUOIA (RM1146U)
CIRCUIT INSPECTION
Power Source Circuit
CIRCUIT DESCRIPTION
This circuit provides power to operate the sliding roof control ECU.
WIRING DIAGRAM