1996 TOYOTA LAND CRUISER Terminal

Q07467
Cruise Control ECUOD OD1B+
G−O
9 18ECM
E7
BE3840
Q07658 D00091
ON
(−) (+) OD1
DI−172
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
1996 LAND CRUISER (RM451U)
O/D Cancel Signal Circuit
CIRCUIT DESCRIPTION
While driving with cruise control activated, in order to minimize gear shifting and provide\
smooth cruising on
an uphill, overdrive may be prohibited temporarily in some conditions.
The cruise control ECU sends O/D cut signals to the ECM as necessary and\
the ECM cancels overdrive
shifting until these signals are discontinued.
(For details, see the Cruise Control section, page DI−292)
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check voltage between terminal OD1 of ECM and body ground.
PREPARATION:
Turn the ignition switch ON.
CHECK:
Measure the voltage between terminal OD1 of the ECM and
body ground.
OK:
Voltage: 9 − 14 V
OK Proceed to next circuit inspection shown on problem symptoms table (See page DI−147 ).
NG
DI5L0−02
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BE3840
Q07660 D00015
ON
OD
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
DI−173
1996 LAND CRUISER (RM451U)
2 Check voltage between terminal OD of cruise control ECU harness side connec-
tor and body ground.
PREPARATION:
(a) Disconnect the cruise control ECU connector.
(b) Turn ignition switch ON.
CHECK:
Measure the voltage between terminal OD of the cruise control
ECU harness side connector and body ground.
OK:
Voltage: 9 − 14 V
OK Check and replace cruise control ECU.
NG
3 Check harness and connector between cruise control ECU and ECM (See pag\
e IN−28 ).
NG Repair or replace wire harness or connector.
OK
Check and replace ECM.
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BE3840
Q08230D00093
ON
OD2
DI−176
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
1996 LAND CRUISER (RM451U)
2 Check OVRDRIVE CUT SW2 signal.
When using TOYOTA hand −held tester:
PREPARATION:
(a) Remove the fuse box cover.
(b) Connect a TOYOTA hand−held tester to the DLC3.
(c) Turn the ignition switch ON and TOYOTA hand−held tes-
ter main switch ON.
CHECK:
Read the OVRDRIVE CUT SW2 signal on the TOYOTA hand −
held tester.
OK:
O/D Main SwitchOVRDRIVE CUT SW2 Signal
O/D ON (pushed in)OFF
O/D OFF (pushed out)ON
When not using TOYOTA hand −held tester:
PREPARATION:
Turn the ignition switch ON.
CHECK:
Check the voltage between terminal OD2 of the ECM and body
ground.
OK:
O/D Main SwitchVoltage
O/D ON9 − 14 V
O/D OFFBelow 3 V
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI−147 ).
NG
3 Check harness and connector between O/D OFF indicator light and ECM (Se\
e page IN−28 ).
NG Repair or replace harness or connector.
OK
Check and replace ECM.
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Q08233
Q08233
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
DI−177
1996 LAND CRUISER (RM451U)
4 Check O/D main switch.
CHECK:
(a) Disconnect the O/D main switch connector.
(b) Measure the resistance between terminals 2 and 4 of the
O/D main switch connector.
OK:
O/D Main SwitchResistance
ON∞ Ω〈 open)
OFF0 Ω (continuity)
NG Replace O/D main switch.
OK
Check and replace the combination meter
(See page BE−32 ).
O/D OFF indicator light remains ON:
1 Check O/D main switch.
CHECK:
(a) Disconnect the O/D main switch connector.
(b) Measure the resistance between terminals 2 and 4 of the
O/D main switch connector.
OK:
O/D Main SwitchResistance
ON∞ Ω〈 open)
OFF0 Ω (continuity)
NG Replace O/D main switch.
OK
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BE3840
Q08229D00094
PWR
ON
DI−180
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
1996 LAND CRUISER (RM451U)
2 Check PATTERN SEL SW signal.
When using TOYOTA hand −held tester:
PREPARATION:
(a) Remove the fuse box cover.
(b) Connect a TOYOTA hand−held tester to the DLC3.
(c) Turn the ignition switch ON and TOYOTA hand−held tes-
ter main switch ON.
CHECK:
Read the PWR signal on the TOYOTA hand −held tester.
OK:
PWR Mode SwitchPATTERN SEL SW Signal
PWRON
NORMOFF
When not using TOYOTA hand −held tester:
PREPARATION:
Turn the ignition switch ON.
CHECK:
Measure the voltage between terminal PWR of the ECM con-
nector and body ground when the PWR mode switch is set to
the PWR (POWER) position and NORM (NORMAL) position.
OK:
PWR Mode SwitchVoltage
PWR7.5 − 14 V
NORMBelow 1.5 V
HINT:
The ECM uses the normal pattern signal if the power signal is
not input.
OK Proceed to next circuit inspection shown on problem symptoms table (See page DI−147 ).
NG
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Q08235
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
DI−181
1996 LAND CRUISER (RM451U)
3 Check PWR mode switch.
PREPARATION:
Disconnect the pattern select switch connector.
CHECK:
Check the resistance between terminals of the pattern select
switch connector when the PWR mode switch is set to PWR and
NORM positions.
OK:
PWR Mode SwitchResistance
PWR0 Ω (continuity)
NORM∞ Ω (open)
NG Replace pattern select switch.
OK
4 Check harness and connector between battery and pattern select switch, a\
nd pattern select switch and ECM (See page IN−28).
NG Repair or replace harness or connector.
OK
Check and replace ECM.
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Q08234
D00096
ONHOLD
HI
DI−184
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
1996 LAND CRUISER (RM451U)
3 Check 2nd start switch.
PREPARATION:
Disconnect the pattern select switch connector.
CHECK:
Check the resistance between terminals 2 and 5 of the pattern
select switch connector when the pattern select switch is set to
2nd start switch ON and OFF.
OK:
2nd Start SwitchResistance
ON0 Ω (continuity)
OFF∞ Ω (open)
NG Replace pattern select switch.
OK
4 Check voltage between terminals HOLD and HI of ECM and body ground.
PREPARATION:
(a) Turn ignition switch ON.
(b) Disconnect the connector from the ECM.
CHECK:
Check the voltage between terminal HOLD of the ECM and
body ground when the select switch is set to 2nd start switch ON
and OFF.
OK:
2nd Start SwitchVoltage
ON9 − 14 V
OFFBelow 1.5 V
CHECK:
Check the voltage between terminal HI of the ECM and body
ground.
OK:
Voltage: 7.5 − 14 V
OK Check and replace ECM.
NG
Check and replace harness and connector between battery and patten select switch, pattern se-
lect switch and ECM, battery and 2nd start indicator light, and 2nd start in\
dicator light and ECM
(See page IN−28 ).
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Q08234
D00096
ONHOLD
HI
DI-187
-
DIAGNOSTICS AUTOMATIC TRANSMISSION
1996 LAND CRUISER (RM451U)
3 Check 2nd start switch.
PREPARATION:
Disconnect the pattern select switch connector.
CHECK:
Check continuity between terminals 2 and 5 of pattern select
switch connector when pattern select switch is set to 2nd start
switch ON and OFF.
OK:
2nd start switchSpecified condition
Press continuously º2ndº switch0 W (Continuity)
Release º2ndº switch8 W (open)
NG Replace pattern select switch.
OK
4 Check voltage between terminals HOLD and HI of ECM and body ground.
PREPARATION:
(a) Turn ignition switch ON.
(b) Disconnect the connector of ECM.
CHECK:
Check voltage between terminal HOLD of ECM and body
ground when the select switch is set to 2nd start switch ON and
OFF.
OK:
2nd start switchVoltage
ON9 - 14 V
OFFBelow 1.5 V
CHECK:
Check voltage between terminal HI of ECM and body ground.
OK:
Voltage: 7.5 - 14 V
OK Check and replace the ECM.
NG
Check and replace harness and connector between battery and patten select swi\
tch, pattern se-
lect switch and ECM, battery and 2nd start indicator light , 2nd start indic\
ator light and ECM
(See page IN-27 ).
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