Page 1089 of 3115
A19976
Engine Room J/B:
EFI or ECD No. 1 Fuse
- DIAGNOSTICSENGINE
DI-349
542 Author: Date:
2004 LAND CRUISER (RM1071U)
7 Check EFI or ECD No. 1 fuse of engine room J/B.
PREPARATION:
Remove the EFI or ECD No. 1 fuse from the engine room J/B.
CHECK:
Check continuity of EFI or ECD No. 1 fuse.
OK:
Continuity
NG Check for short in all harness and components
connected to EFI or ECD No. 1 fuse.
OK
8 Check EFI or ECD relay (See page SF-38).
NG Replace EFI or ECD relay.
OK
9 Check for open and short in harness and connector between terminal MREL of
ECM and body ground (See page
IN-36).
NG Repair or replace harness or connector.
OK
Check and repair harness or connector be-
tween EFI or ECD No. 1 fuse and battery
(See page
IN-36).
Page 1090 of 3115
DI-350
- DIAGNOSTICSENGINE
543 Author: Date:
2004 LAND CRUISER (RM1071U)
Fuel Pump Control Circuit
CIRCUIT DESCRIPTION
Refer to DTC P0230 on page DI-162.
WIRING DIAGRAM
Refer to DTC P0230 on page DI-162.
INSPECTION PROCEDURE
Hand-held tester:
1 Check fuel pump operation (See page SF-7).
OK Go to step 8.
NG
2 Connect hand-held tester, and check operation of fuel pump relay.
PREPARATION:
(a) Connect the hand-held tester to the DLC3.
(b) Turn the ignition switch ON and push the hand-held tester main switch ON.
(c) Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FUEL PUMP / SPD.
CHECK:
Check the operation of the fuel pump relay when it is switched ON and OFF by the hand-held tester.
OK:
Operating noise can be heard from the relay.
OK Go to step 4.
NG
3 Check operation of fuel pump relay (See page SF-40).
NG Replace fuel pump relay.
OK
DIB2Y-02
Page 1091 of 3115
- DIAGNOSTICSENGINE
DI-351
544 Author: Date:
2004 LAND CRUISER (RM1071U)
4 Check fuel pump (See page SF-7).
NG Repair or replace fuel pump.
OK
5 Check circuit opening relay (See page SF-39).
NG Replace circuit opening relay.
OK
6 Check for open in harness and connector between EFI or ECD relay and fuel
pump, and fuel pump and body ground (See page IN-36).
NG Repair or replace harness or connector.
OK
Page 1092 of 3115
A19521A19629
FC(+)
ECM ConnectorE9
DI-352
- DIAGNOSTICSENGINE
545 Author: Date:
2004 LAND CRUISER (RM1071U)
7 Check voltage between terminal FC and E1 of ECM connector.
PREPARATION:
Turn the ignition switch ON.
CHECK:
Measure the voltage between terminal FC of the ECM connec-
tor and body ground.
OK:
Voltage: 9 to 14 V
NG Check for open in harness and connector be-
tween battery and FC terminal of ECM (See page
IN-36).
OK
Proceed to problem symptoms table
(See page DI-48).
8 Check fuel pump resistor (See page SF-42).
NG Replace fuel pump resistor.
OK
Check for open in harness and connector between circuit opening relay and fuel pump resistor,
and fuel pump resistor and fuel pump (See page IN-36).
Page 1093 of 3115
- DIAGNOSTICSENGINE
DI-353
546 Author: Date:
2004 LAND CRUISER (RM1071U)
OBD II scan tool (excluding hand-held tester):
1 Check operation of fuel pump (See page SF-7).
OK Go to step 7.
NG
2 Check operation of fuel pump relay (See page SF-40).
NG Replace fuel pump relay.
OK
3 Check fuel pump (See page SF-7).
NG Repair or replace fuel pump.
OK
4 Check circuit opening relay (See page SF-39).
NG Replace circuit opening relay.
OK
5 Check for open in harness and connector between EFI or ECD relay and fuel
pump, and fuel pump and body ground (See page IN-36).
NG Repair or replace harness or connector.
OK
Page 1094 of 3115
A19521A19629
FC(+)
ECM ConnectorE9
DI-354
- DIAGNOSTICSENGINE
547 Author: Date:
2004 LAND CRUISER (RM1071U)
6 Check voltage between terminal FC of ECM connector and body ground.
PREPARATION:
Turn the ignition switch ON.
CHECK:
Measure the voltage between terminal FC of the ECM connec-
tor and body ground.
OK:
Voltage: 9 to 14 V
NG Check for open in harness and connector be-
tween battery and FC terminal of ECM (See page
IN-36).
OK
Proceed to problem symptoms table
(See page DI-48).
7 Check fuel pump resistor (See page SF-42).
NG Replace fuel pump resistor.
OK
Check for open in harness and connector between circuit opening relay and fuel pump resistor,
fuel pump resistor and fuel pump (See page IN-36).
Page 1095 of 3115
A21366
Engine
Room
R/B11ECM
W
E9 11
C13
C12
SB10
Battery7
4I18
Ignition
Switch
73E
3Q 6
B-R
MET
Combination
Meter
Malfunction
Indicator
Lamp AM2IG2 AM2
W
B-RSB
2Q 2D32 78
Cowl Side
J/B RHA
AJ4
J/B W-R
2E 41
10
2A
W-R
1B 9
1C 1
F15 2
Fusible Link
Block B-G
120A MAIN
- DIAGNOSTICSENGINE
DI-355
548 Author: Date:
2004 LAND CRUISER (RM1071U)
MIL Circuit
CIRCUIT DESCRIPTION
If the ECM detects a trouble, the MIL lights up. At this time, the ECM records a DTC in the memory.
WIRING DIAGRAM
DIC2V-01
Page 1096 of 3115

A21033ECM ConnectorW
E9
DI-356
- DIAGNOSTICSENGINE
549 Author: Date:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
HINT:
Troubleshoot each trouble symptom in accordance with the chart below .
MIL remains onStart inspection from step 1
MIL does not light upStart inspection from step 3
1 Clear DTC.
(a) Connect the hand-held tester or the OBD II scan tool to the DLC3.
(b) Turn the ignition switch ON and push the hand-held tester or the OBD II scan tool main switch ON.
(c) Read the DTC (See page DI-3).
(d) Clear the DTC (See page DI-3).
(e) Check that MIL does not light up.
Standard: MIL does not light up
OK Repair circuit indicated by output code
(See page DI-36).
NG
2 Check harness and connector (Check for short in wire harness).
(a) Disconnect the E9 ECM connector.
(b) Turn the ignition switch ON.
(c) Check that MIL does not light up.
Standard: MIL does not light up
OK Replace ECM (See page SF-60).
NG
Check and repair harness and connector be-
tween combination meter and ECM (See page
IN-36).