Page 1081 of 3115

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.
Page 1082 of 3115
No.Operation MethodCRUISE Main Indicator Light
Blinking PatternDiagnosis
1 Turn -/SET switch ON
2Turn +/RES switch ON
3Turn CANCEL switch ON
Depress brake pedal
(Turn stop lamp switch assy ON)
Shift to except D position
(Turn PNP switch OFF)
LightON
OFFSwitch ON
Switch OFF
LightON
OFFSwitch OFF
Switch ON-/SET switch circuit
is normal
+/RES switch circuit
is normal
CANCEL switch circuit
is normal
Stop light switch circuit
is normal
PNP switch circuit is
normal
LightON
OFF LightON
OFF
0.5 sec.0.5 sec.
I24838
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-987
1180 Author: Date:
2004 LAND CRUISER (RM1071U)
HINT:
When 2 or more signals are input to the ECM, the lowest num-
bered code will be displayed first.
7. INPUT SIGNAL CHECK
(Using hand-held tester)
(a) Connect the hand-held tester to DLC3.
(b) Check the control switch (MAIN, CANCEL, SET/COAST,
RES/ACC).
Page 1083 of 3115

DI26X-37
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-991
1184 Author: Date:
2004 LAND CRUISER (RM1071U)
PROBLEM SYMPTOMS TABLE
SymptomSuspect AreaSee page
SET not occurring or CANCEL occurring.
(DTC is Normal)
1. Input Signal Circuit
2. Vehicle Speed Sensor Circuit
3. Stop Light Switch Circuit
4. Park/Neutral Position Switch Circuit
5. ECMDI-997
DI-992
DI-993
IN-36
SET not occurring or CANCEL occurring.
(DTC is not output)1. ECMIN-36
Actual vehicle speed deviates above or below the set speed.1. Input Signal Circuit
2. ECMDI-997
IN-36
Gear shifting occurs frequently between 3rd and O/D when driving
on uphill road. (Hurting)1. ECMIN-36
Cruise control not cancelled, even when brake pedal is de-
pressed.1. Stop Light Switch Circuit
2. ECMDI-993
IN-36
Cruise control not cancelled, even when transmission is shifted to
ºNº position.1. Park/Neutral Position Switch Circuit
2. ECM
IN-36
Control switch does not operate.
(+/SET, +/RES, CANCEL not possible)1. Cruise Control Switch Circuit
2. ECMDI-998
IN-36
SET possible at 40 km/h (25 mph) or less, or CANCEL does not
operate at 40 km/h (25 mph) or less.1. Input Signal Circuit
2. ECMDI-997
IN-36
Poor response is ACCEL and RESUME modes.1. ECMIN-36
O/D does not resume, even though the road is not uphill.1. ECMIN-36
DTC memory is erased.1. ECMIN-36
DTC is not output, or is output when should not be.1. Diagnosis Circuit
2. ECM-
IN-36
Cruise MAIN indicator light remains ON or falls to light up.1. Input Signal Circuit
2. ECMDI-997
IN-36
Cruise MAIN indicator light does not light up.1. Cruise MAIN indicator Light CircuitDI-1001
Page 1084 of 3115
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
Page 1085 of 3115
- 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
Page 1086 of 3115
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
Page 1087 of 3115
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
Page 1088 of 3115
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