1986 TOYOTA LAND CRUISER ignition

I24683
ºCRUISE
MAINº
Indicator
light
BE4034
Indicator Light
1.5 sec.0.5 sec.
ON
OFF
A04550
10 11 12 13 14 15 16 12345678
9
TCCG
I03610
Normal Code
0.25 sec.
0.25 sec.
ON
OFF
ON
OFF
2.5 sec. 0.5 sec.1.5 sec.
Malfunction codes 52
Code 52
0.5 sec.
DI-982
- DIAGNOSTICSCRUISE CONTROL SYSTEM
1175 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(c) Check the indicator.
(1) Turn the ignition switch to ON.
(2) Check that the CRUISE MAIN indicator light comes
on when the cruise control main switch is turned
ON, and that the indicator light goes off when the
main switch is turned OFF.
HINT:
If the indicator check result is not normal, proceed to trouble-
shooting (See page BE-2) for the combination meter
section.
(d) Check the DTC.
HINT:
If a malfunction occurs in the speed sensor or stop light switch,
etc. during cruise control driving, the ECM actuates AUTO
CANCEL of the cruise control and turns ON and OFF the
CRUISE MAIN indicator light to inform the driver of a malfunc-
tion. At the same time, the malfunction is stored in memory as
a diagnostic trouble code.
(e) Output DTC using diagnosis check wire.
(1) Turn the ignition switch ON.
(2) Using SST, connect terminals Tc and CG of DLC3.
SST 09843-18040
(3) Read the DTC on the CRUISE MAIN indicator light.
HINT:

If the DTC is not output, inspect the diagnosis circuit.

As an example, the blinking patterns for codes; normal 52
are shown in the illustration.

I24672
Hand-held tester
DLC3
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-983
1176 Author
: Date
:
2004 LAND CRUISER (RM1071U)
2. USING HAND-HELD TESTER
(a) Hook up the hand-held tester to the DLC3.
(b) Monitor the ECU data by following the prompts on the tes-
ter screen.
HINT:
Hand-held tester has a ºSnapshotº function which records the
monitored data.
Please refer to the hand-held tester operator's manual for fur-
ther details.
3. DTC CLEARANCE
(a) The following actions 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.
(b) After completing repairs, the DTC retained in memory can
be cleared by removing the EFI fuse for 10 seconds or
more with the ignition switch off.
(c) Check that the normal code is displayed after connecting
the fuse.
4. 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.
ItemMeasurement Item/Display
(Range)Normal ConditionDiagnostic Note
VEHICLE SPD
Vehicle speed/
min.: 0 km/h (0 mph)max.: 255
km/h (158 mph)
Actual vehicle speed-
MEMORY SPD
Vehicle speed/
min.: 0 km/h (0 mph)max.: 255
km/h (158 mph)
Actual vehicle speed-
THROTTLE
Throttle operating angle/
min.: 0 km/h (0 mph)max.: 125
km/h ( mph)
Actual vehicle speed-
CRUISE CONTROLCruise controlON: Cruise control is SET
OFF: Cruise control is UNSET-
MAIN SW (MAIN)Main switch
(Main CPU)
ON: Main switch (Main CPU) is
SET
OFF: Main switch (Main CPU) is
UNSET
-

I24838
(1) (3)
I24838
(2), (7) (1), (4)
(1), (4) DI-986
- DIAGNOSTICSCRUISE CONTROL SYSTEM
1179 Author
: Date
:
2004 LAND CRUISER (RM1071U)

Pull the cruise control switch to CANCEL
(e) Inspect the RESUME switch.
(1) Push the main switch button to ON.
(2) Drive at a desired speed [40 km/h (25 mph) or high-
er].
(3) When operating one of the followings, check that
the cruise control system is cancelled and that the
normal driving mode is reset.

Depress the brake pedal

Shift to except D position

Press the main switch button to OFF
(4) After the control switch is pulled up to +/RES at the
driving speed of more than 40 km/h (25 mph), check
that the vehicle restores the speed before the can-
cellation.
6. INPUT SIGNAL CHECK
HINT:

For check No.1 - No. 3
Turn the ignition switch to ON.

For check No. 4
Jack up the vehicle.
Start the engine.
Shift to D position
(a) Check the input signal
(1) Keep the main switch to -/SET or +/RES position
and hold it down or hold it up.
(2) Press the switch button to ON.
(3) Check that the CRUISE mainindicator light blinks
twice or 3 times repeatedly after 3 seconds.
(4) Turn the -/SET or +/RES switch to OFF.
(5) Operate each switch as listed in the table below.
(6) Read the blinking pattern of the CRUISE main indi-
cator light.
(7) After performing the check, turn the main switch
button to OFF.

DI3CH-17
I25003
E5E6E7E8E9 DI-990
- DIAGNOSTICSCRUISE CONTROL SYSTEM
1183 Author
: Date
:
2004 LAND CRUISER (RM1071U)
TERMINALS OF ECM
Symbols (Terminals No.)Wiring ColorConditionSpecified condition
STP e E1GWBRDepress brake pedal10 - 16 VSTP e E1
(E8-19 e E7-1)G-W e BRRelease brake pedalBelow 1 V
Ignition switch ON10 - 16 V
Ignition switch ON
CANCEL switch hold ON3.6 - 7.2 V
Ignition switch ON
-/SET switch hold ON2.1 - 4.9 V
CCS e E1
(E8-24 e E7-1)L e BRIgnition switch ON
+/RES switch hold ON0.7 - 2.6 V
Ignition switch ONBl 1VIgnition switch ON
Main switch OFFBelow 1 V
Ignition switch ON10 14 VIgnition switch ON
Main switch ON10 - 14 V
ST1- e E1RGBRDepress brake pedalBelow 1 VST1 e E1
(E8-12 e E7-1)R-G e BRRelease brake pedal10 - 14 V

- DIAGNOSTICSENGINE
DI-345
538 Author
: Date
:
2004 LAND CRUISER (RM1071U)
ECM Power Source Circuit
CIRCUIT DESCRIPTION
When the ignition switch is turned ON, battery positive voltage is applied to terminal IGSW of the ECM and
the EFI or ECD relay control circuit in the ECM sends a signal to terminal MREL of the ECM switching on
the EFI or ECD relay.
This signal causes current to flow to the coil, closing the contacts of the EFI or ECD relay and supplying pow-
er to terminal +B of the ECM.
DIB2X-02

A19975
ECM
IGSW
+B
MREL
E1 9
E9
E9
E9
E7 4D 4E 3E 3E14 9 8 4
A A
6741 10
536 2E2A
2A 2D1
9
11 1
1
11
1 1
1 8 2 15 3
24
2
44 43
1B 1A5D
5C 1C
1B
1B Cowl Side J/B RH
Engine Room J/B
J/B No. 5 J4
J/C
Cowl Side J/B LH I18
Ignition SW
AM2 IG2
Engine Room R/B
Engine Room J/B
MAIN
BatteryEFI or ECD Relay
EA ECB-R B-R B-R
B-R W-R W-R
B-Y
B-Y
W-R B-G
B-YB-Y
B-W B-W
W-B W-B BR
F15
FL Block
EFI or ECD No. 1
IGN
AM2J/B No. 4 DI-346
- DIAGNOSTICSENGINE
539 Author
: Date
:
2004 LAND CRUISER (RM1071U)
WIRING DIAGRAM

A19521A19629
+B E1(+) (-)
E7ECM ConnectorE9
A19521A19629
IGSW(+)
ECM ConnectorE9
- DIAGNOSTICSENGINE
DI-347
540 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
1 Check voltage between terminals +B and E1 of ECM connectors.
PREPARATION:
Turn the ignition switch ON.
CHECK:
Measure the voltage between terminals +B and E1 of the ECM
connectors.
OK:
Voltage: 9 to 14 V
OK Proceed to next circuit inspection shown on
problem symptoms table (See page BE-2).
NG
2 Check for open in harness and connector between terminal E1 of ECM and body
ground (See page IN-36).
NG Repair or replace harness or connector.
OK
3 Check voltage between terminal IGSW of ECM connector and body ground.
PREPARATION:
Turn the ignition switch ON.
CHECK:
Measure the voltage between terminal IGSW of the ECM con-
nector and body ground.
OK:
Voltage: 9 to 14 V
OK Go to step 6.
NG

A19978
IGN Cowl Side
J/B RH:
A19521A19629
MREL(+)
ECM ConnectorE9
DI-348
- DIAGNOSTICSENGINE
541 Author
: Date
:
2004 LAND CRUISER (RM1071U)
4 Check IGN fuse.
PREPARATION:
Remove the IGN fuse from the cowl side J/B RH.
CHECK:
Check the continuity of the IGN fuse.
OK:
Continuity
NG Check for short in all harness and components
connected to IGN fuse.
OK
5 Check ignition switch (See page BE-29).
NG Replace ignition switch.
OK
Check and repair harness and connector be-
tween battery and ignition switch, and igni-
tion switch and ECM
(See page IN-36).
6 Check voltage between terminal MREL of ECM connector and body ground.
PREPARATION:
Turn the ignition switch ON.
CHECK:
Measure the voltage between terminal MREL of the ECM con-
nector and body ground.
OK:
Voltage: 9 to 14 V
NG Replace ECM (See page SF-60).
OK