1996 TOYOTA LAND CRUISER INSTRUMENT PANEL

A00192
ONFC
(+)
(−)
BE6653
P24684
DI−11 8
−
DIAGNOSTICS ENGINE
1996 LAND CRUISER (RM451U)
3 Check voltage between terminal FC 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 FC of ECM and body
ground.
OK:
Voltage: 9 − 14 V
OK Go to step 5.
NG
Check for open and short in harness and connector between terminal FC of ECM a\
nd circuit open-
ing relay and fuse block (See page IN−28).
4 Connect the TOYOTA hand−held tester and check operation of fuel pump relay.
PREPARATION:
(a) Connect the TOYOTA hand−held tester to the DLC3.
(b) Start the engine.
(c) Turn TOYOTA hand−held tester main switch ON.
(d) Select the ACTIVE TEST mode on the TOYOTA hand−held tester.
CHECK:
Check operation of fuel pump relay when it is switched ON and OFF by the\
TOYOTA hand −held tester.
OK:
Operating noise can be heard from the relay.
OK Go to step 8.
NG
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A00193
Continuity ContinuityOpen
Open (+) (−) 1
2
3
4
5
6
1
2
3
6
54
P24685
P24686
P24687
FPR
(+)
(−)
−
DIAGNOSTICS ENGINE
DI−11 9
1996 LAND CRUISER (RM451U)
5 Check operation of fuel pump relay.
PREPARATION:
(a) Disconnect fuel pump relay connector.
(b) Remove fuel pump relay.
CHECK:
Check continuity between terminals of fuel pump relay.
OK:
Terminals 3 and 5Continuity
Terminals 2 and 5Open
Terminals 1 and 5Continuity
(Reference value 80 Ω)
CHECK:
(a) Apply battery voltage between terminals 1 and 5.
(b) Measure voltage between terminals 1 and 2.
OK:
Terminals 1 and 2Battery voltage
NG Replace fuel pump relay.
OK
6 Check voltage between terminal FPR of ECM connector and body ground.
PREPARATION:
(a) Remove instrument panel speaker No.1 panel (See page
SF−65 ).
(b) Start the engine.
CHECK:
Measure voltage between terminal FPR of ECM and body
ground while racing the engine.
OK:
Time after engine startedVoltage
60 seconds or more0 − 3 V
Less than 60 seconds9 − 14 V
OK Check and replace ECM (See page IN−28 ).
NG
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A00194
HighLowFPR
P22900
P09401
DI−120
−
DIAGNOSTICS ENGINE
1996 LAND CRUISER (RM451U)
7 Check for open and short in harness and connector between terminal FPR of
ECM connector and fuel pump relay (See page IN−28).
NG Repair or replace harness or connector.
OK
8 Check operation of fuel pump.
PREPARATION:
(a) Remove instrument panel speaker No.1 panel (See page
SF−65 ).
(b) Connect the TOYOTA hand − held tester to the DLC3.
(c) Turn ignition switch ON and TOYOTA hand −held tester
main switch ON.
(d) Use ACTIVE TEST mode to operate the fuel pump.
CHECK:
Check operation of fuel pump, when it is operated by the TOYO-
TA hand− held tester and terminal FPR of ECM is grounded and
is not grounded.
OK:
There is pressure in the inlet hose.
HINT:
At this time, you will hear a fuel flowing noise.
FPR is grounded
(Low speed)FPR is not grounded (High speed)
NGNGGo to step 9
NGOKGo to step 10
OKNG
Repair or replace
harness or connector between fuel pump
relay and fuel pump.
9 Check fuel pump (See page SF−6 ).
NG Repair or replace fuel pump.
OK
Check for open or short in harness and connector between EFI main relay (Mark\
ing: EFI) and cir-
cuit opening relay and fuel pump relay and fuel pump and body ground (See p\
age IN−28).
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A00195
ONFC
BE6653
P22178
P09401
−
DIAGNOSTICS ENGINE
DI−121
1996 LAND CRUISER (RM451U)
10 Check fuel pump resistor. (See page SF−58).
NG Replace fuel pump resistor.
OK
Check for open and short in harness and connector between fuel pump relay and fuel\
pump resis-
tor and fuel pump (See page IN−28).
OBD II scan tool (excluding TOYOTA hand −held tester)
1 Check fuel pump operation.
PREPARATION:
(a) Remove instrument panel speaker No.1 panel (See page
SF−65 ).
(b) Turn ignition switch ON.
CHECK:
(a) Connect between terminal FC of ECM and body ground.
(b) Check for fuel pressure in the fuel inlet hose when it is pinched off.
OK:
There is pressure in the fuel inlet hose.
HINT:
At this time, you will hear a fuel flowing noise.
OK Go to step 4.
OK
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A00196
ONFC
High LowFPR
BE6653
P22901
P09401
−
DIAGNOSTICS ENGINE
DI−123
1996 LAND CRUISER (RM451U)
7 Check operation of fuel pump.
PREPARATION:
(a) Remove instrument panel speaker No.1 panel (See page
SF−65 ).
(b) Turn ignition switch ON.
CHECK:
(a) Connect terminal FC of ECM and body ground.
(b) Check operation of fuel pump when terminal FPR of ECM
is grounded and is not grounded.
OK:
There is pressure in the inlet hose.
HINT:
At this time, you will hear a fuel flowing noise.
FPR is grounded
(Low speed)FPR is not grounded (High speed)
NGNGGo to step 8
NGOKGo to step 9
OKNG
Repair or replace
harness or connecter between fuel pump
relay and fuel pump.
8 Check fuel pump (See page SF−6 ).
NG Repair or replace fuel pump.
OK
Check for open or short in harness and connector between EFI main relay (Mark\
ing: EFI) and cir-
cuit opening relay and fuel pump relay and fuel pump and body ground (See p\
age IN−28).
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A00197
ONON
OFF
BE6653
P22965
P22966
G
E
G E Air Filter
Air Filter
DI−126
−
DIAGNOSTICS ENGINE
1996 LAND CRUISER (RM451U)
INSPECTION PROCEDURE
TOYOTA hand −held tester
1 Connect the TOYOTA hand−held tester and check operation of VSV for fuel
pressure control.
PREPARATION:
(a) Remove the fuse cover on the instrument panel.
(b) Connect the TOYOTA hand−held tester to the DLC3.
(c) Turn ignition switch ON and TOYOTA hand −held tester
main switch ON.
(d) Select the ACTIVE TEST mode on the TOYOTA hand −
held tester.
CHECK:
Check operation of VSV when VSV is operated by the T OYOTA
hand −held tester.
OK:
VSV is ON:
Air from pipe E is flowing out through the air filter.
VSV is OFF:
Air from pipe E is flowing out through pipe G.
OK Check and repair fuel pressure regulator (See page SF−19 ).
NG
2 Check VSV for fuel pressure control (See page SF−59).
NG Replace VSV for fuel pressure control.
OK
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A00198
ONFPU
(+)
(−)
BE6653
P24688
−
DIAGNOSTICS ENGINE
DI−127
1996 LAND CRUISER (RM451U)
3 Check for open and short in harness and connector between EFI main relay
(Marking: EFI) and ECM (See page IN−28).
NG Repair or replace harness or connector.
OK
Check and replace ECM (See page IN−28 ).
OBD II scan tool (excluding TOYOTA hand −held tester)
1 Check VSV for fuel pressure control (See page SF−59 ).
NG Replace VSV for fuel pressure control.
OK
2 Check voltage between terminal FPU 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 FPU of ECM connector and
body ground.
OK:
Voltage: 9 − 14 V
NG Check for open and short in harness and con- nector between EFI main relay (Marking: EFI)
and ECM (See page IN−28 ).
OK
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DI5K9−03
Q08225
Q08634
TOYOTA Hand−held Tester
DLC3
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
DI−131
1996 LAND CRUISER (RM451U)
PRE−CHECK
1. DIAGNOSIS SYSTEM
(a) Description
When troubleshooting OBD II vehicles, the only dif-
ference from the usual troubleshooting procedure
is that you connect to the vehicle the OBD II scan
tool complying with SAE J1978 or TOYOTA hand −
held tester, and read off various data output from
the vehicle’s ECM.
OBD II regulations require that the vehicle’s on −
board computer lights up the Malfunction Indicator
Lamp (MIL) on the instrument panel when the com-
puter detects a malfunction in the computer itself or
in drive system components which affect vehicle
emissions. In addition to the MIL lighting up when
a malfunction is detected, the applicable DTCs pre-
scribed by SAE J2012 are recorded in the ECM
memory (See page DI−13).
If the malfunction does not occurs in 3 trips, the MIL goes off but
the DTCs remain recorded in the ECM memory.
To check the DTCs, connect an OBD II scan tool or
TOYOTA hand−held tester to the DLC3 on the ve-
hicle. The OBD II scan tool or TOYOTA hand−held
tester also enables you to erase the DTCs and
check freeze frame data and various forms of en-
gine data (For operating instructions, see the OBDII
scan tool’s instruction book).
DTCs include SAE controlled codes and Manufac-
turer controlled codes.
SAE controlled codes must be set as prescribed by
the SAE, while Manufacturer controlled codes can
be set freely by the manufacturer within the pre-
scribed limits (See page DI−143).
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