1986 TOYOTA LAND CRUISER ignition

I24672
DLC3
Hand-held tester
DI1AL-28
A04550
DLC3
10 11 12 13 14 15 16 12345678
9
DI-1004
- DIAGNOSTICSENGINE IMMOBILISER SYSTEM
1197 Author
: Date
:
2004 LAND CRUISER (RM1071U)
PRE-CHECK
1. DIAGNOSIS SYSTEM
(a) Description
ECM controls the function of immobiliser on this vehicle.
Data of the immobiliser or DTC can be read from DLC3 of
the vehicle. When a trouble occurs on immobiliser, MIL
does not light up but DTC inspection is performed.
Therefore when there seems to be a trouble on immobilis-
er, use hand-held tester or SST to check and trouble-
shoot it.
(b) Inspect the DLC3.
The vehicle's ECM uses ISO 9141-2 for communication.
The terminal arrangement of DLC3 complies with
SAEJ1962 and matches the ISO 9141-2 format.
Tester connectionconditionSpecified condition
7 (Bus
Line) - 5 (Signal ground)During communicationPulse generation
4 (Chassis Ground) - BodyAlways1 W or less
5 (Signal Ground) - BodyAlways1 W or less
16 (B+) - BodyAlways9 - 14 V
HINT:
If your display shows ºUNABLE TO CONNECT TO VEHICLEº
when you have connected the cable of hand-held tester to
DLC3, turned the ignition switch ON and operated the hand-
held tester, there is a problem on the vehicle side or tool side.

If communication is normal when the tool is connected to
another vehicle, inspect DLC3 on the original vehicle.

If communication is still not possible when the tool is con-
nected to another vehicle, the problem is probably in the
tool itself, so consult the Service Department listed in the
tool's instruction manual.

I01190
DLC1
TC E1
BR3904
Normal code
0.25 Sec. 0.25 Sec.
- DIAGNOSTICSENGINE IMMOBILISER SYSTEM
DI-1005
1198 Author
: Date
:
2004 LAND CRUISER (RM1071U)
2. INSPECT DIAGNOSIS
(a) Check the DTC (Using hand-held tester).
(1) Prepare hand-held tester.
(2) Connect hand-held tester to DLC3 under the instru-
ment panel lower pad.
(3) Turn the ignition switch ON and turn hand-held tes-
ter switch ON.
(4) Use hand- held tester to check the DTCs. and
ºSnap-shot functionº which records the monitor
data (For operating instructions, see the hand-held
tester instruction book.).
(5) See page DI-1007 to confirm the details of the
DTCs.
(b) Check the DTC (Using diagnosis check wire).
(1) Turn ignition switch ON.
(2) Using SST, connect between terminals 11 (TC) and
3 (E1) of DLC1.
SST 09843-18020
(3) Read the diagnostic trouble code from malfunction
indicator lamp.
HINT:

If a diagnostic trouble code is not output, check the TC ter-
minal circuit.

ECM controls the immobiliser function on this vehicle,
DTC is out put with engine data.

As an example, the blinking patterns for codes; normal,
12 and 99 are shown in the charts.

I02680
Malfunction Code (Example Code 12, 99)
0.5 Sec. 0.5 Sec.
1.5 Sec. 2.5 Sec.
One Cycle4.5 Sec. DI-1006
- DIAGNOSTICSENGINE IMMOBILISER SYSTEM
1199 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(4) When DTC º99º is output, there is a trouble of
immobiliser. Start troubleshooting referring to
PROBLEM SYMPTOMS TABLE.
(5) After completing the check, disconnect terminals 11
(TC) and 3 (E1) and turn off the display.
HINT:
In the event of 2 or more malfunction codes, indication will begin
from the smaller numbered code and continue in order to the
larger.
(c) Clear the DTC.
The following operations will erase the DTCs and freeze
frame data.
(1) Operating the hand-held tester to erase the codes
(See the hand-held tester instruction book for oper-
ating instructions.).
(2) Disconnecting the battery terminals or EFI fuse.
3. CHECK HAND-HELD TESTER
(a) ECU DATA MONITOR
(1) Make a judgement of good or bad and find out a malfunctioning part by the data monitor.
Standard:
TRANSPONDER KEY ECU
ItemConditionSpecified Condition
IMMOBILISERIgnition switch ON " When key is not inserted in
the ignition switch cylinderUNSET/SET
MASTER KEYIgnition switch ON with master key " Pull out
key from ignition switch cylinderCORRESP/WRONG
SUB KEYIgnition switch ON with sub-key " Pull out key
from ignition switch cylinderCORRESP/WRONG
REGIST MAS CODE-0 - 3
REGIST SUB CODE-0 - 1
KEY SWIgnition switch ON "Without keyON/OFF
IG SWIgnition switch ON "OFFON/OFF
(b) ACTIVE TEST
(1) Make a judgement of good or bad and find out a malfunctioning part by the active test.
Standard:
TRANSPONDER KEY ECU
ItemOperation
SECURITY INDICON / OFF

DIB5W-01
I25609
T19
- DIAGNOSTICSENGINE IMMOBILISER SYSTEM
DI-1009
1202 Author
: Date
:
2004 LAND CRUISER (RM1071U)
TERMINALS OF ECM
1. TRANSPONDER KEY ECU
(a) Disconnect the transponder key ECU connector.
Standard:
Symbols (Terminal No.)Wiring ColorConditionSpecified condition
T19-14 Body ground
(GND
Body ground)W-B e Body groundConstantContinuity
T19-1 T19-14
(+B
GND)L-W e W-BConstant10 - 14 V
T19-2 T19-14
(IG
GND)B-R e W-BIgnition switch OFF "ON0 V " 10 - 14 V
T19-10 T19-14
(KSW
GND)R-B e W-BNo key in the ignition key cylinder " With keyNo Continuity " Continuity
T19-4 T19-14
(CTY
GND)R-Y eW-BDriver's door close " openNo Continuity " Continuity
T19-10 T19-14
(KSW
GND)R-B e W-BNo key in the ignition key cylinder " With key10 - 14 V " 0 V
T19-8 T19-14
(VC5
GND)Y e W-BIgnition switch OFF "ON0 V " 5 V
T19-12 T19-14
(TXCT
GND)V-G e W-BIgnition switch OFF "ONWaveform 1
T19-1 1 T19-14
(CODE
GND)L-B e W-BIgnition switch OFF "ONWaveform 2
T19-6 T19-14
(EFIO
GND)W e W-BIgnition switch OFF "ONWaveform 3
T19-7 T19-14
(EFII
GND)Y e W-BIgnition switch OFF "ONWaveform 4
T19-3 T19-14
(IND
GND)G-R e W-BImmobiliser system unset " set0 V "
10 - 14 V e 0 V
T19-4 T19-14
(CTY
GND)R-Y e W-BDriver's door close " open10 - 14 V " 0 V

I25610
5 V20 ms
I25611
10 V20 ms
I25613
5 V5 ms
I25614
5 V5 ms DI-1010
- DIAGNOSTICSENGINE IMMOBILISER SYSTEM
1203 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(b) Inspection using osilloscope.
Referece:
(c) Waveform 1
ItemCondition
TerminalTXCT - GND
Tool setting5 V/DIV, 20 ms/DIV
Vehicle conditionIgnition switch ON
Referece:
(d) Waveform 2
ItemCondition
TerminalCODE - GND
Tool setting10 V/DIV, 20 ms/DIV
Vehicle conditionIgnition switch ON
Referece:
(e) Waveform 3
ItemCondition
TerminalEFIO - GND
Tool setting5 V/DIV, 5 ms/DIV
Vehicle conditionIgnition switch ON
Referece:
(f) Waveform 4
ItemCondition
TerminalEFII - GND
Tool setting5 V/DIV, 5 ms/DIV
Vehicle conditionConstant

I25615
E5E6
E7E8
E9
I25613
5 V5 ms
- DIAGNOSTICSENGINE IMMOBILISER SYSTEM
DI-101 1
1204 Author
: Date
:
2004 LAND CRUISER (RM1071U)
2. ECM
Symbols (Terminal No.)Wiring ColorConditionSpecified condition
E9-3 e E7-1
(BATT e E1)B-R e BRConstant9 - 14 V
E9-1 e E7-1
(+B e E1)B-Y e BRIgnition switch OFF "ON9 - 14 V
E9-2 e E7-1
(+B2 e E1)B-Y e BRIgnition switch OFF "ON9 - 14 V
E9-9 e E7-1
(IGSW e E1)B-R e BRIgnition switch OFF "ON9 - 14 V
E8-27 e E7-1
(IMI e E1)W e BRNo key in the ignition key cylinder " With keyWaveform 1
E8-26 e E7-1
(IMO e E1)Y e BRNo key in the ignition key cylinder " With keyWaveform 2
E7-1 e Body ground
(E1 e Body ground)BR e Body groundConstantContinuity
(a) Inspection using osilloscope.
Referece:
(b) Waveform 1
ItemCondition
TerminalIMI - GND
Tool setting5 V/DIV, 5 ms/DIV
Vehicle conditionIgnition switch ON

F17298
Tilt & Telescopic ECU
BatteryMAINEngine Room J/B
GND ECU-B2
3D
T7
W-B J1
J/CECUB
T7 3B
IICowl Side J/B RH
1
6 L-W
FL Block
F152
B-G
Cowl Side J/B RH1C1
12 Short Pin(A)
BAT
1B24 L-O 2539
W-B
3D 42
AA
- DIAGNOSTICSPOWER TILT AND POWER TELESCOPIC STEERING
COLUMNDI-673
866 Author
: Date
:
2004 LAND CRUISER (RM1071U)
ECU Power Source Circuit
CIRCUIT DESCRIPTION
The ECU power source supplies power to the CPU and sensors, etc. power is supplied to the ECU even
when the ignition switch is lock position.
WIRING DIAGRAM
DI23K-16

F03704
ON
TOYOTA
Hand-held
TesterExtend
Contract
F05991
Telescopic Motor
Tilt Motor
Connector Telescopic
Motor
Connector
- DIAGNOSTICSPOWER TILT AND POWER TELESCOPIC STEERING
COLUMNDI-685
878 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
In case of using TOYOTA hand-held tester, start inspection from step 1.
In case of not using TOYOTA hand-held tester, start inspection from step 2.
1 Check telescopic motor operation using TOYOTA hand-held tester.
PREPARATION:
(a) Connect the TOYOTA hand-held tester to the DLC3.
(b) Turn ignition switch ON and push the TOYOTA hand-held
tester main switch ON.
(c) Select the ACTIVE TEST mode on the TOYOTA hand-
held tester.
CHECK:
Check that the steering column length become short (long) and
confirm that telescopic position value change when the AC-
TIVE TEST carried out.
OK:
Steering column length must be short (long).
Telescopic position value must be changed.
OK Proceed to next circuit inspection shown on the
problem symptoms table (See page DI-663).
NG
2 Check telescopic motor.
PREPARATION:
(a) Disconnect telescopic motor connector and tilt motor con-
nector.
(b) Remove telescopic motor (See page SR-30).
CHECK:
Connect tilt motor connector to telescopic motor. Then confirm
that telescopic motor moved when operating the manual
switch.
NG Replace telescopic motor.
OK