Position TOYOTA LAND CRUISER 1996 J80 Workshop Manual

BE6653
FI7058A00486
Throttle Position
SensorON
4
3
21
1
11
9
10
E5
E5
E5 E5
VTA
ECM
VCC
IDL
E2 E112V
5V
FI7064
A00487
Throttle Position Sensor
4
3
2
11
11
9
10
E5
E5
E5 E5
VTA
ECM
VCC
IDL
E2 E112V
5V
IDL E2
ON
DI−94
−
DIAGNOSTICS ENGINE
1996 LAND CRUISER (RM451U)
2 Check for open in harness or ECM.
PREPARATION:
(a) Disconnect throttle position sensor connector.
(b) Connect sensor wire harness terminals between terminals 1 and 2.
(c) Turn ignition switch ON.
CHECK:
Read CTP switch signal on TOYOTA hand −held tester.
OK:
CTP switch signal: ON
OK Confirm good connection at sensor. If OK, replace throttle position sensor.
NG
3 Check for open in harness or ECM.
PREPARATION:
(a) Remove instrument panel speaker No.1 panel (See page SF−65 ).
(b) Connect between terminals IDL and E2 of ECM.
HINT:
Throttle position sensor connector is disconnected.
Before checking, do a visual check and contact pressure check
for connector (See page IN−28).
(c) Turn ignition switch ON.
CHECK:
Read CTP switch signal on TOYOTA hand −held tester.
OK:
CTP switch signal: ON
OK Open in harness between ECM and throttle position sensor, repair or replace harness.
NG
Confirm connection at ECM.
If OK, replace ECM (See page IN−28).
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BE6653A00499A00488
Throttle Position Sensor
4
3
2
11
11
9
10
E5
E5
E5 E5
VTA
ECM
VCC IDL1
E2 E112V
5V
ON
BE6653
A00496 A00498
A00489
4
3
2
11
11
9
10
E5
E5
E5 E5
VTA1
ECM
VCC IDL1
E2 12V
5V
ON
Throttle Position
Sensor
E5 Connector
−
DIAGNOSTICS ENGINE
DI−95
1996 LAND CRUISER (RM451U)
4 Check for short in harness or ECM.
PREPARATION:
(a) Disconnect throttle position sensor connector.
(b) Turn ignition switch ON.
CHECK:
Read CTP switch signal on TOYOTA hand −held tester.
OK:
CTP switch signal: OFF
OK Confirm good connection at sensor. If OK, replace throttle position sensor.
NG
5 Check for short in harness or ECM.
PREPARATION:
(a) Remove instrument panel speaker No.1 panel (See page SF−65 ).
(b) Disconnect E5 connector of ECM.
HINT:
Throttle position sensor connector is disconnected.
(c) Turn ignition switch ON.
CHECK:
Read CTP switch signal on TOYOTA hand −held tester.
OK:
CTP switch signal: OFF
OK Short in harness between ECM and throttle position sensor, repair or replace harness.
NG
Confirm connection at ECM.
If OK, replace ECM (See page IN−28).
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A00492
43
2
11
11
9
10
E5
E5
E5 E5
VTA
ECM
VCC
IDL
E2E1 12V
5V
ON
Throttle Position Sensor
DI−96
−
DIAGNOSTICS ENGINE
1996 LAND CRUISER (RM451U)
OBD II scan tool (excluding TOYOTA hand −held tester)
1 Check for open and short in harness or ECM.
PREPARATION:
(a) Disconnect throttle position sensor connector.
(b) Turn ignition switch ON.
CHECK:
Measure voltage between terminals 1 and 2 of throttle position
sensor connector.
OK:
Voltage: 9 − 14 V
OK Confirm good connection at sensor. If OK, replace throttle position sensor.
NG
2 Check for open and short in harness and connector between throttle posit\
ion sensor and ECM (See page IN−28).
NG Open or short in harness between ECM and
throttle position sensor.
OK
Confirm connection at ECM.
If OK, replace ECM (See page IN−28).
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A00184
STARTIGT
(+)(−)
BE6653
P24674
A00186
ON and START
3
BE6653
P24675
DI−100
−
DIAGNOSTICS ENGINE
1996 LAND CRUISER (RM451U)
6 Disconnect igniter connector and check voltage between terminals IGT of ECM
connector and body ground.
PREPARATION:
(a) Disconnect igniter connector.
(b) Remove instrument panel speaker No.1 panel (See page
SF−65 ).
CHECK:
Measure voltage between terminal IGT of ECM connector and
body ground when engine is cranked.
OK:
Voltage: More than 0.1 V and less than 4.5 V
OK Check and replace ECM (See page IN−28 ).
NG
7 Check voltage between terminal 3 of igniter connector and body ground.
PREPARATION:
Disconnect igniter connector.
CHECK:
Measure voltage between terminal 3 of igniter connector and
body ground, when ignition switch is turned to ”ON” and
”START” position.
OK:
Voltage: 9 − 14 V
NG Check and repair igniter power source circuit.
OK
8 Check for open and short in harness and connector between ignition switc\
h and ignition coil, ignition coil and igniter (See page IN−28).
NG Repair or replace harness or connector.
OK
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DI−102
−
DIAGNOSTICS ENGINE
1996 LAND CRUISER (RM451U)
DTC P1335 Crankshaft Position Sensor Circuit Malfunction (during engine running)
CIRCUIT DESCRIPTION
Refer to DTC P0335 (Crankshaft Position Sensor ”A” Circuit Malfunction\
) on page DI−62.
DTC No.DTC Detecting ConditionTrouble Area
P1335No crankshaft position sensor signal (NE signal) to ECM with
engine speed 1,000 rpm or more
Open or short in crankshaft position sensor circuit for NE
signal
 Crankshaft position sensor for NE signal
 Starter
 ECM
WIRING DIAGRAM
See DTC P0335 (Crankshaft Position Sensor ”A” Circuit Malfunction) \
for WIRING DIAGRAM and INSPEC-
TION PROCEDURE.
DI5PR−02
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DI−104
−
DIAGNOSTICS ENGINE
1996 LAND CRUISER (RM451U)
INSPECTION PROCEDURE
HINT:
This diagnostic chart is based on the premise that the engine is cranked normally. If the engine is not
cranked, proceed to the matrix chart of problem symptoms on page DI−19.
1 Connect TOYOTA hand −held tester and check STA signal.
PREPARATION:
(a) Connect the TOYOTA hand−held tester to the DLC3.
(b) Turn ignition switch ON and push TOYOTA hand −held tester main switch ON.
CHECK:
Read STA signal on the TOYOTA hand −held tester while starter operates.
OK:
Ignition Switch PositionONSTART
STA SignalOFFON
OK Proceed to next circuit inspection shown on matrix chart (See page DI−19 ).
NG
2 Check for open in harness and connector between ECM and starter relay (See page IN−28 ).
NG Repair or replace harness or connector.
OK
Check and replace ECM
(See page IN−28 ).
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P22478
Battery
FL AM1
Fusible Link
1F6
B−L
2
2 2
2
3
4
AM1
R/B No.2
Junction
Connector (J4)
Y Y
IG Switch
4 2
1 B−W
B−YFuse Block
GAUGE
Y
B
B 6IH14
B−W Park/Neutral
Position Switch
3
2 G−R G−W
O
O
IH2
To A/T Indicator Light
(Combination Meter)
Starter
1
S1 E7
E7
E7
17
16
22 NSW
E1B+
E1 E1
L
2 ECM
W
EA26
B
B
B−R
65 3
2IH1
21
B−W
IH2
DI−108
−
DIAGNOSTICS ENGINE
1996 LAND CRUISER (RM451U)
DTC P1780 Park/Neutral Position Switch Malfunction
CIRCUIT DESCRIPTION
The park/neutral position switch goes on when the shift lever is in the N o\
r P shift position. When it goes on
terminal NSW of the ECM is grounded to body ground via the starter relay, thus the terminal NSW voltage
becomes 0 V. When the shift lever is in the D, 2, L or R position, the park/neutral\
position switch goes off,
so the voltage of ECM, terminal NSW becomes battery voltage, the voltage of the ECM internal power
source. If the shift lever is moved from the N position to the D position, this signal is used for air\
−fuel ratio
correction and for idle speed control (estimated control), etc.
DTC No.DTC Detecting ConditionTrouble Area
P1780
2 or more switches are ON simultaneously for ”N”, ”2” and ”\
L”
position (2 trip detection logic)
 Short in park/neutral position switch circuit
 Park/neutral position switch
 ECMWhen driving under conditions (a) and (b) for 30 sec. or more
the park/neutral position switch is ON (N position):
(2 trip detection logic)
(a) Vehicle speed: 70 km/h (44 mph) or more
(b) Engine speed: 1,500 − 2,500 rpm
HINT:
After confirming DTC P1780 use the T OYOTA hand−held tester to confirm the PNP switch signal from ”CUR-
RENT DATA”.
WIRING DIAGRAM
DI5PV−02
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P24677
32
4
10 98 6
51
7
A00188
ON
NSW
(+)
(−)
BE6653
P24678
−
DIAGNOSTICS ENGINE
DI−109
1996 LAND CRUISER (RM451U)
INSPECTION PROCEDURE
1 Check park/neutral position switch.
PREPARATION:
Disconnect park/neutral position switch connector.
CHECK:
Check continuity between each terminal shown below when the
shift lever is positioned to each range.
OK:
Shift PositionTerminal No. to continuityTerminal No. to continuity
P4 − 75 − 6
R4 − 8−
N4 − 105 − 6
D4 − 9−
22 − 4−
L3 − 4−
NG Replace park/neutral position switch.
OK
2 Check voltage between terminal NSW of ECM connector and body ground.
PREPARATION:
Remove instrument panel speaker No.1 panel
(See page SF−65 ).
CHECK:
(a) Turn ignition switch ON.
(b) Measure voltage between terminal NSW of ECM connec-
tor and body ground when the shift lever is positioned to
the following positions.
OK:
Shift lever positionP or NL, 2, D or R
Voltage0 V9 − 14 V
OK Check and replace ECM (See page IN−28 ).
NG
Check for open and short in harness and
connector between ECM and park/neutral
position switch (See page IN−28).
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P24681
DI−11 2
−
DIAGNOSTICS ENGINE
1996 LAND CRUISER (RM451U)
4 Check IGN fuse from fuse block.
NG Check for short in all the harness and
components connected to IGN fuse.
OK
5 Check ignition switch.
PREPARATION:
(a) Remove instrument lower finish panel.
(b) Remove instrument cluster finish center panel No.2.
CHECK:
Check continuity between terminals.
OK:
Shift PositionTerminal No. to continuityTerminal No. to continuity
LOCK−−
ACC3 − 4−
ON2 − 3 − 46 − 11
START1 − 2 − 45 − 6 − 11
NG Replace ignition switch.
OK
Check for open and short in harness and
connector between battery and ignition
switch and ECM.
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P22480
BatteryStarter
FL MAIN
FL AM2EFI
EFI Main Relay
IG Switch IG
ST
Park/Neutral
Position SwitchCircuit Opening
Relay
Fuel Pump Relay
Fuel Pump
From Crankshaft Position
Sensor Fuel Pump
Resistor
(STA Signal)
(NE Signal) MRLY
FC
STA
NE
Tr1
Tr2
ECM
IGN FPR
−
DIAGNOSTICS ENGINE
DI−11 5
1996 LAND CRUISER (RM451U)
Fuel Pump Control Circuit
CIRCUIT DESCRIPTION
In the diagram below, when the engine is cranked, current flows form terminal ST of the igni\
tion switch to
terminal STA of ECM (STA signal).
When the STA signal and NE signal are input to the ECM, Tr1 is turned ON, current flows to coil of the circuit
opening relay, the relay switches on, power is supplied to the fuel pump and the fuel\
pump operates.
While the NE signal is generated (engine running), the ECM keeps Tr1 ON (circuit opening relay ON) and
the fuel pump also keeps operating.
The fuel pump speed is controlled at 2 levels (high speed or low speed) b\
y the condition of the engine (start-
ing, light load, heavy load). When the engine starts (STA ON), Tr2 in the ECM is OFF, so battery voltage is
applied directry to the fuel pump. Fuel pump operates at high speed.
After the engine starts, during idling or light loads, since Tr2 goes ON, power is supplied to the fuel pump
via the fuel pump resistor.
Fuel pump operates at low speed.
DI5PY−02
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