1996 TOYOTA LAND CRUISER Ect

BE6053P24676A08534
LOCK
(+)
(−)
BATT
P22346
R/B No.2
EFI Fuse
DI−106
−
DIAGNOSTICS ENGINE
1996 LAND CRUISER (RM451U)
INSPECTION PROCEDURE
1 Check voltage between terminal BATT of ECM connector and body ground.
PREPARATION:
Remove the instrument panel speaker No.1 panel
(See page SF−65 ).
CHECK:
Measure voltage between terminal BATT of ECM connector
and body ground.
OK:
Voltage 9 − 14 V
OK Check and replace ECM (See page IN−28 ).
NG
2 Check EFI fuse.
PREPARATION:
Remove EFI fuse from R/B No.2.
CHECK:
Check continuity of EFI fuse.
OK:
Continuity
NG Check for short in all the harness and components connected to EFI fuse.
OK
Check and repair harness or connector
between battery, EFI fuse and ECM.
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−
DIAGNOSTICS ENGINE
DI−107
1996 LAND CRUISER (RM451U)
DTC P1605 Knock Control CPU Malfunction
CIRCUIT DESCRIPTION
Refer to DTC P0325, P0330 (Knock Sensor 1, 2 Circuit Malfunction) on page DI−59.
DTC No.DTC Detecting ConditionTrouble Area
P1605Engine control computer malfunction (for knock control)ECM
WIRING DIAGRAM
Refer to P0325, P0330 (Knock Sensor 1, 2 Circuit Malfunction) on page DI−59.
INSPECTION PROCEDURE
1 Are there any other codes (besides DTC P1605) being output?
YES Go to relevant DTC chart.
NO
Check and replace ECM (See page IN−28 ).
DI5PU−02
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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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A00189
ON
E1 +B
(−) (+)
BE6653
P24679
A00190
ON
IGSW
(+)
(−)
BE6653
P24680
−
DIAGNOSTICS ENGINE
DI−111
1996 LAND CRUISER (RM451U)
INSPECTION PROCEDURE
1 Check voltage between terminals +B and E1 of the ECM connector.
PREPARATION:
(a) Remove instrument panel speaker No.1 panel
(See page SF−65 ).
(b) Turn ignition switch ON.
CHECK:
Measure voltage between terminals +B and E1 of the ECM con-
nector.
OK:
Voltage: 9 − 14 V
OK Proceed to next circuit inspection shown on matrix chart (See page DI−19 ).
NG
2 Check for open in harness and connector between terminal E1 of ECM conne\
ctor and body ground (See page IN−28).
NG Repair or replace harness or connector.
OK
3 Check voltage between terminal IGSW of ECM connector and body ground.
PREPARATION:
(a) Remove instrument panel speaker No.1 panel (See page SF−65 ).
(b) Turn ignition switch ON.
CHECK:
Measure voltage between terminals IGSW of ECM and body
ground.
OK:
Voltage: 9 − 14 V
OK Go to step 6.
NG
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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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A00191
ONMRLY(+)
(−)
BE6653
P24682
−
DIAGNOSTICS ENGINE
DI−11 3
1996 LAND CRUISER (RM451U)
6 Check voltage between terminal MREL of ECM connector and body ground.
PREPARATION:
(a) Remove instrument panel speaker No.1 panel
(See page SF−65 ).
(b) Turn ignition switch ON.
CHECK:
Measure voltage between terminal MREL of ECM and body
ground.
OK:
Voltage: 9 − 14 V
NG Check and replace ECM.
OK
7 Check EFI fuse (Marking: EFI) (See page DI−105).
NG Check for short in all the harness and
components connected to EFI fuse.
OK
8 Check EFI main relay (Marking: EFI) (See page SF−54).
NG Replace EFI main relay (Marking: EFI).
OK
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DI−11 4
−
DIAGNOSTICS ENGINE
1996 LAND CRUISER (RM451U)
9 Check for open and short in harness and connector between terminal MREL of
ECM connector and body ground (See page IN−28).
NG Repair or replace harness or connector.
OK
Check for open and short in harness and
connector between terminal +B of ECM
connector and battery (See page IN−28 ).
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Version 1.11 - 03/16/2010