TOYOTA SEQUOIA 2001 Service Repair Manual

C00083CG
D6DLC3:
C00083
TCDLC3:
D6
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±1569
1763 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check harness and connector (CG of DLC3 ± Body ground).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Symbol
(Tester connection)ConditionSpecified condition
CG (D6±4) ± Body groundAlwaysBelow 1 W
NG Repair or replace harness or connector.
OK
3 Check harness and connector (TC of DLC3 ± Body ground).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Symbol
(Tester connection)ConditionSpecified condition
TC (D6±13) ± Body
groundAlways10 kW or higher
NG Repair or replace harness, connector or each
ECU.
OK
Replace ECM (See page IN±35).

DID65±01
DI±1570
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
1764 Author: Date:
2005 SEQUOIA (RM1146U)
ENGINE IMMOBILISER 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

DI1AJ±49
Vehicle Brought to Workshop
Customer Problem Analysis
Check and Clear DTCItems inside
are titles of pages in this manual,
with the page number in the bottom portion. See
the pages for detailed explanations.
Problem Symptom ConfirmationSymptom Simulation Symptom
does not occur
Symptom
occurs
DTC Check
Circuit Inspection and Part Inspection
DTC ChartProblem Symptoms Table
Identification of Problem
Repair
Confirmation Test
End
1
2
3
4
6
77
8
9
10
P. DI±1572
P. DI±1576
P. IN±24
P. DI±1573 P. DI±1576
P. DI±1578
P. DI±1580 ± DI±1599
Multiplex Communication System Inspection * 5
P. DI±1904
*: Confirm that there is no trouble by DTC check.
Normal system code
Trouble code
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
DI±1571
1765 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.
Troubleshoot in accordance with the following procedures:

DI1AK±28
ENGINE IMMOBILISER Check SheetInspector 's
Name:
Customer 's Name
Date Vehicle
Brought InLicence Plate No. VIN
Production Date
Odometer Reading/ /
/ /
Date Problem First Occurred
Frequency Problem Occurs/ /
ContinuousIntermittent ( times a day)
DTC Check1st Time
2nd TimeNormal System Code
Trouble Code (Code )
Normal SystemCodeTrouble Code (Code )
Symptomskm
miles
Engine does not start.
Check ItemMalfunction
Indicator LampNormal
Remains ON Does not Light Up
Immobiliser is not set.
(Engine starts with key codes other than the registered key code.)
Security indicator is always ON.
Security indicator is always ON. (Although code has been registered in the
automatic registration mode, indicator is not OFF.)
Security indicator is OFF.
(When DTC of immobiliser is output)
Security indicator is OFF.
(When DTC of immobiliser is not output)
Security indicator is abnormally blinking.
No code is output. DI±1572
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
1766 Author: Date:
2005 SEQUOIA (RM1146U)
CUSTOMER PROBLEM ANALYSIS CHECK

DI1AP±40
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
DI±1573
1767 Author: Date:
2005 SEQUOIA (RM1146U)
PROBLEM SYMPTOMS TABLE
SymptomSuspected AreaSee page
Immobiliser is not set.
(Engine starts with key codes other than the registered key code.)1. Door courtesy light switch circuit (DTC12)
2. Transponder key ECUDI±1585
IN±35
Engine does not start.
1. Key
2. Key unlock warning switch circuit (DTC11)
3. Transponder key coil
4. Transponder key ECU
5. ECM*1
DI±1582
BE±143
IN±35
IN±35
Security indicator is always ON.
1. Security indicator
2. Security indicator light circuit
3. Transponder key ECU*2
DI±1597
IN±35
Security indicator is always ON.
(Although code has been registered in the automatic registration
mode, indicator is not OFF.)1. Transponder key coil
2. Transponder key ECUBE±143
IN±35
Security indicator is OFF.
(When DTC of immobiliser is output)1. Transponder key coil
2. Transponder key ECUBE±143
IN±35
Security indicator is OFF.
(When DTC of immobiliser is not output)1. Security indicator light circuit
2. Diagnosis circuit
3. Transponder key ECUDI±1597
DI±1599
IN±35
Security indicator is abnormally blinking.Transponder key ECUIN±35
No code is output.
1. Power source circuit
2. Diagnosis circuit
3. Transponder key ECUDI±1595
DI±1599
IN±35
*1 : Check that the key which did not start the engine has been registered, and that it is possible to start with
any other already registered key.
*2 : Finish the automatic registration mode because the mode might still be set.

DIABB±02
I24389
T16 Transponder Key ECU: DI±1574
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
1768 Author: Date:
2005 SEQUOIA (RM1146U)
TERMINALS OF ECU
Symbols (Terminals No.)Wiring ColorConditionSpecified condition
+B e GND
(T16 ± 1 e T16 ± 14)W±R e OAlways10 to 14 V
IG e GND
(T16 ± 2 e T16 ± 14)B±O e OIgnition switch ON10 to 14 V
D e GNDWLOIgnition switch ON " 10 to 14 V " D e GND
(T16 ± 3 e T16 ± 14)W±L e OIgnition switch ON "
Connect terminals OP3 and CG of DLC310 to 14 V "
Below 2 V
CODE e GND
(T16 ± 4 e T16 ± 14)R±Y e OIgnition switch ON10 to 14 V
RXCK e GND
(T16 ± 5 e T16 ± 14)LG e OIgnition switch ON10 to 14 V
VC12 e AGND
(T16 ± 6 e T16 ± 12)GR±B e GR±LAlways10 to 14 V
IND e GNDLG BO
Security indicator light is on. (It flashes when the immobiliser
ti ti)3 to 6 V " IND e GND
(T16 ± 7 e T16 ± 14)LG±B e Osystem is operating.) "
Security indicator light is off.3 to 6 V "
Below 1 V
CTY e GNDGR LODriver's door closed " 10 to 14 V " CTY e GND
(T16 ± 8 e T16 ± 14)GR±L e ODriver s door closed "
Driver's door open10 to 14 V "
Below 1 V
KSW e GNDYGOKey unlock warning switch ON (Key inserted) " Below 1 V " KSW e GND
(T16 ± 9 e T16 ± 14)Y±G e OKey unlock warning switch ON (Key inserted) "
Key unlock warning switch OFF (Key not inserted)Below 1 V "
10 to 14 V
EFII e GND
(T16 ±10 e T16 ± 14)L±Y e OIgnition switch ON10 to 14 V
EFIO e GND
(T16 ±11 e T16 ± 14)P±G e OIgnition switch ON10 to 14 V
AGND e Body ground
(T16 ±12 e Body
ground)
GR±L e Body groundAlwaysBelow 1 V
TXCT e GND
(T16 ± 13 e T16 ± 14)Y±G e OIgnition switch ON10 to 14 V
GND e Body ground
(T16 ±14 e Body
ground)
O e Body groundAlwaysBelow 1 V

DID50±01
C00083DLC3
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
DI±1575
1769 Author: Date:
2005 SEQUOIA (RM1146U)
DIAGNOSIS SYSTEM
1. DIAGNOSIS SYSTEM
(a) Inspect the battery voltage.
Battery voltage: 11 to 14 V
If voltage is below 11 V, recharge the battery before proceeding.
(b) Check the DLC3.
The transponder key ECU uses ISO 9141±2 for commu-
nication. The terminal arrangement of the DLC3 complies
with SAE J1962 and matches the ISO 9141±2 format.

DID51±01
A04550
CG
OP3
DLC3 12345678
9
1011
13 1516 12 14
TC
I28427
Security Indicator
Light MIL
BR3904
Normal System Code
0.25 Sec.0.25 Sec.
I02680
Diagnostic Trouble Code (Example Code 12, 99)
0.5 Sec. 0.5 Sec.
1.5 Sec. 2.5 Sec.
One Cycle4.5 Sec.Repeat
DI±1576
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
1770 Author: Date:
2005 SEQUOIA (RM1146U)
DTC CHECK / CLEAR
1. INSPECT DIAGNOSIS
(a) Check the DTC using SST check wire.
(1) Turn the ignition switch ON, but do not start the en-
gine.
(2) When checking DTC 99: Using SST, connect termi-
nals 13 (TC) and 4 (CG) of the DLC3.
(3) When checking codes except DTC 99: Using SST,
connect terminals 8 (OP3) and 4 (CG) of the DLC3.
SST 09843±18040
(4) Read the DTC indicated by the number of times the
security indicator light or the MIL blinks.
HINT:

If no DTC is output, inspect the diagnosis circuits (OP3
and TC) and the security indicator light circuit (See page
DI±1597, DI±1567, DI±1599).

If the system is operating normally, the light blinks twice
per second.

As an example, the blinking patterns of the normal system
code and trouble codes 12 and 99 are shown on the left
and below.

± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
DI±1577
1771 Author: Date:
2005 SEQUOIA (RM1146U)
(5) When DTC º99º is output, there is a problem with the
immobiliser. Start troubleshooting referring to the
PROBLEM SYMPTOMS TABLE.
(6) After completing the check, disconnect terminals 8
(OP3) and 4 (CG), or terminals 13 (TC) and 4 (CG),
and turn off the display.
HINT:
If 2 or more trouble codes exist, indication will begin from the
lowest numbered code.
(b) Clear the DTC.
(1) When using diagnosis check wire:

Remove the ECU±B fuse and EFI No. 2 fuse from
the engine room J/B for 1 minute or more.

DI1AM±35
DI±1578
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
1772 Author: Date:
2005 SEQUOIA (RM1146U)
DIAGNOSTIC TROUBLE CODE CHART
ECM DIAGNOSTIC TROUBLE CODE CHART (MIL)
DTC No.
(See page)Detection ItemTrouble Area
99
(DI±1580)Engine immobiliser system malfunction

Transponder key ECU

ECM

Wire harness
TRANSPONDER KEY ECU DIAGNOSTIC TROUBLE CODE CHART (SECURITY INDICATOR LIGHT)
DTC No.
(See page)Detection ItemTrouble Area
11
(DI±1582)Code 11 is not output

Unlock warning switch

Transponder key ECU

Wire harness
12
(DI±1585)Code 12 is not output

Driver door courtesy lamp switch

Transponder key ECU

Body ECU

Wire harness
13
(DI±1587)Code 13 is not output

Ignition switch

Transponder key ECU

Wire harness
21, 22
(DI±1589)Code 21 or 22 is not output

Key

Transponder key ECU

Transponder key amplifier with key coil

Wire harness
31, 35, 36, 37
(DI±1592)Code 31, 35, 36 or 37 is outputKey
32, 33
(DI±1593)Code 32 or 33 is output

Key

Transponder key ECU

Wire harness
34Code 34 is outputTransponder key ECU has no memory space to register anoth-
er key code
HINT:

DTCs 11, 12, 13, 21 and 22 are normal codes.

As for the normal codes, if the corresponding DTC is not output while operating any of the components
listed under ºTrouble Areaº, perform the inspection described in the reference pages.

DTCs 31, 32, 33, 34, 35, 36, 37 and 99 are abnormal codes.