tp sensor TOYOTA LAND CRUISER 1996 J80 Workshop Manual

I00491
Cruise Control ECU
C17
Speedometer
(Combination Meter)
C13
C13
4 3
Vehicle Speed Sensor (Combination Meter) R−O
R−O
R−G
R−G 25
1
Ea1EC1
IH1L−W
BR Air Intake Chamber
EC
V1
V1
V13 2
1
1
Ea1 EC1
3 6
Y
Y GAUGE
AM1
Y
Y
BR
BR
EC1
Ea1 IH1
22
Instrument Panel Fuse
Block
Fusible Link BatteryWB
B
I12
I12
Ignition Switch 2
4
1
3
F11
F11Y
B
B
J4
JUNCTION
CONNECTOR
EA1
6
2
2 3
4
B−L
FL MAIN
F6
1 B−Y
39
20
SPD
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI−307
1996 LAND CRUISER (RM451U)
WIRING DIAGRAM
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Input SignalIndicator Light
Blinking Pattern
Drive at about
40 km/h (25 mph)
or below
Drive at about
40 km/h (25 mph)
or higher Light
ON
OFF
Light ON
OFF
DI−308
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
INSPECTION PROCEDURE
1 Input signal check.
CHECK:
(a) See input signal check on page DI−286.
(b) Check indicator light operation when driving with vehicle speed above 40 km/h (25 mph), and with vehicle speed
below 40 km/h (25 mph).
OK:
Vehicle speed above 40 km/h (25 mph):
Indicator light blinks
Vehicle speed below 40 km/h (25 mph):
Indicator light stays on
OK Check and replace cruise control ECU (See page IN−28 ).
NG
2 Check speedometer circuit (See Combination meter troubleshooting on pag\
e BE−34 ).
NG Repair or replace harness, connector or com-
bination meter assembly.
OK
3 Check harness and connector between cruise control ECU and combination m\
e- ter, combination meter and vehicle speed sensor (See page IN−28 ).
NG Repair or replace harness or connector.
OK
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−
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI−309
1996 LAND CRUISER (RM451U)
4 Check vehicle speed sensor (See page BE−34).
NG Replace vehicle speed sensor.
OK
Check and replace cruise control ECU
(See page IN−28 ).
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DI−310
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
DTC 23 Vehicle Speed Signal Abnormal
CIRCUIT DESCRIPTION
See page DI−306 .
DTC No.Detection ItemTrouble Area
23
Vehicle speed sensor pulse is abnormal. (When speed signal
is not input to the ECU below 0.2 sec., code will be dis-
played.)Vehicle speed sensor
 Cruise control ECU
WIRING DIAGRAM
See page DI−306 .
INSPECTION PROCEDURE
1 Check vehicle speed sensor (See page BE−34).
NG Replace vehicle speed sensor.
OK
Check and replace cruise control ECU (See
page IN−28 ).
DI5OG−02
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I00493
Cruise Control ECUIDL
C17 21
G−W
ECM
IDL IH1
E5 19
G−W
11
Threottle Position Sensor G−W
DI−316
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
Idle Switch Circuit
CIRCUIT DESCRIPTION
When the idle switch in turned ON, a signal is sent to the ECU. The ECU uses\
this signal to correct the dis-
crepancy between the throttle valve position and the actuator position sensor val\
ue to enable accurate
cruise control at the set speed. If the idle switch is malfunctioning, problem\
symptoms also occur in the en-
gine, so also inspect the engine.
WIRING DIAGRAM
DI5OJ−02
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AB0119I00053 I00031
ON
IDL
(−) (+)
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI−317
1996 LAND CRUISER (RM451U)
INSPECTION PROCEDURE
1 Check voltage between terminal IDL of cruise control ECU connector and body
ground.
PREPARATION:
(a) Remove the ECU with connector still connected.
(b) Disconnect the ECM and ABS ECU connectors.
(c) Turn ignition switch ON.
CHECK:
Measure voltage between terminal IDL of ECU connector and
body ground when the throttle valve is fully closed and fully
opened.
OK:
Throttle valve positionVoltage
Fully opened10 − 14 V
Fully closedBelow 2 V
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI−295 ).
NG
2 Check harness and connector between ECM and throttle position sensor (See page IN−28 ).
NG Repair or replace harness or connector.
OK
3 Check throttle position sensor circuit (See page DI−35).
NG Replace throttle position sensor.
OK
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I00052
Throttle Position Sensor
3
4
DI−318
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
4 Check throttle position sensor.
PREPARATION:
Disconnect the throttle position sensor connector.
CHECK:
Measure resistance between terminals 3 and 4 of throttle posi-
tion sensor connector when the throttle valve is fully closed and
fully opened.
OK:
Throttle valve positionResistance
Fully opened1 MΩ or higher
Fully closedBelow 2.3 kΩ
NG Replace throttle position sensor.
OK
5 Check for open and short in harness and connector between cruise control\
ECU and throttle position sensor, throttle position sensor and body ground
(See page IN−28 ).
NG Repair or replace harness or connector.
OK
Check and replace cruise control ECU
(See page IN−28 ).
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I00496
Cruise Control ECU
Fusible Link Fusible Link
Battery BR
BR
Instrument
Panel Fuse Block
ECU−IG
Ignition Switch BB
2
4 3
2
F6
1 JUNCTION
CONNECTOR J6
C17
C17B−W
I12
I12 4
2
2
2
2 B−W
F11
F11
B
B−Y
B
6EA2B
GND
13
14
AM1
FL AM1
1
ID
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI−325
1996 LAND CRUISER (RM451U)
ECU Power Source Circuit
CIRCUIT DESCRIPTION
The ECU power source supplies power to the actuator and sensors, etc.. When\
terminal GND and the cruise
control ECU case are grounded.
WIRING DIAGRAM
DI5OM−02
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EM−2
−
ENGINE MECHANICAL CO/HC
505
Author: Date:
1996 LAND CRUISER (RM451U)
6. TROUBLESHOOTING
If the CO/HC concentration does not comply with regulations,
troubleshoot in the order given below.
See the table below for possible causes, and then inspect and
correct the applicable causes if necessary.
COHCProblemsCauses
NormalHighRough idle
3. Faulty ignitions:
Incorrect timing
 Fouled, shorted or improperly gapped plugs
 Open or crossed high −tension cords
 Cracked distributor cap
4. Incorrect valve clearance
5. Leaky EGR valve
6. Leaky intake and exhaust valves
7. Leaky cylinders
LowHighRough idle
(Fluctuating HC reading)
1. Vacuum leaks:
 PCV hose
 EGR valve
 Intake manifold
 Air intake chamber
 Throttle body
 IAC valve
 Brake booster line
2. Lean mixture causing misfire
HighHighRough idle
(Black smoke from exhaust)
1. Restricted air filter
2. Faulty SFI systems:
 Faulty pressure regulator
 Clogged fuel return line
 Defective ECT sensor
 Faulty ECM
 Faulty injector
 Faulty throttle position sensor
 Faulty MAF meter
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EM−14
−
ENGINE MECHANICAL TIMING CHAIN
1996 LAND CRUISER (RM451U)
9. DISCONNECT OIL COOLER PIPE BRACKET FROM
NO. 1 OIL PAN
10. REMOVE OIL LEVEL SENSOR
(a) Remove the 4 bolts and level sensor.
(b) Remove the gasket from the level sensor.
11. REMOVE BOLTS HOLDING NO.1 OIL PAN TO TRANS-
MISSION HOUSING
Remove the 6 bolts.
12. REMOVE NO. 2 OIL PAN (See page LU−5)
13. REMOVE NO. 1 OIL PAN (See page LU−5)
14. REMOVE CRANKSHAFT PULLEY
(a) Using SST, remove the pulley bolt. SST 09213−58012, 09330 −00021
(b) Remove the crankshaft pulley.
HINT:
If necessary, remove the pulley with SST. SST 09950−50010 (09951 −05010, 09952−05010,
09953 −05010, 09953 −05020, 09954−05020)
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