Page 2601 of 4770
A00355
IGN Fuse
Instrument Panel J/B
± DIAGNOSTICSENGINE (5S±FE)
DI±181
416 Author: Date:
4 Check EFI fuse (See page DI±173, step 2).
NG Check for short in all harness and components
connected to EFI fuse.
OK
5 Check for open in harness and connector between EFI main relay (Marking: EFI)
and battery, and EFI main relay and ECM (See page IN±31).
NG Repair or replace harness or connector.
OK
6 Check IGN fuse.
PREPARATION:
Remove the IGN fuse from the instrument panel J/B.
CHECK:
Check continuity of the IGN fuse.
OK:
Continuity
NG Check for short in all harness and components
connected to IGN fuse.
OK
Page 2602 of 4770
DI±182
± DIAGNOSTICSENGINE (5S±FE)
417 Author: Date:
7 Check ignition switch (See page BE±14).
NG Replace ignition switch.
OK
Check for open in harness and connector between IG switch and EFI main relay, and EFI main
relay and body ground (See page IN±31).
Page 2603 of 4770
A00325
BatteryMAIN IG Switch
AM2EFI
MAIN
FLStarter ST RelayPark/Neutral Position Switch
(Clutch Start Switch)EFI RelayCIR OPN Relay
Fuel Pump
ECM
FC
Tr
STA
NE (STA Signal)
(NE Signal) IGN
STARTER ST
± DIAGNOSTICSENGINE (5S±FE)
DI±183
418 Author: Date:
Fuel Pump Control Circuit
CIRCUIT DESCRIPTION
In the diagram below, when the engine is cranked, current flows from terminal ST of the ignition switch to
the starter relay coil and also current flows to terminal STA of ECM (STA signal).
When the STA signal and NE signal are input to the ECM, Tr 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 Tr ON (circuit opening relay ON) and the
fuel pump also keeps operating.
DI01M±05
Page 2604 of 4770
A07555
Battery
EFI
AM2
123
3 1J
B2A
2J Instrument Panel J/B
B
1B 1W
37
1 5
IG Switch
1
B±W
B±RST RelayEFI Relay
5
6
2 3
1 11 410
4
5 4
5
A 2B STARTER
(M/T)
B±G
II23
B±W
II211
Starter
Park/Neutral
Position Switch
Clutch Start
Switch
5 7
B±R Engine Room J/B No.2
2C
2F IGN
FL Block1
2D1
BMAIN
B±O (*3) W±B
GR (*2)
10B
C
1
CIR
OPN
Relay
L±B
IGG±R
W±B
14 2L
E7FCECM
E01
1
S1S2
Engine Room R/B
No.1
2
J40
J/C
G±RL±B
5 93
Fuel
Pump
L±B
R
EB B±R
GR
W±R
B±W
B±WB±O (*3)(A/T)
BL
J/CB±R
J8
2K
J7
B
1 1 1
B 1K
1K
1K
8 7
6
EB1 4
J29
J/C J11
J/CF6 1 W±R
MAIN
FL4
5 2K
2
B±R (*4)
*1: w/ Immobiliser(*1)
MREL
E107 B±W
B
B
B±WII4
6
F41
GR (*2)
*2: TMC Made
*3: TMMK Made A
(*1)
(*1)
GR (*2)
B±O (*3)(M/T)
*4: w/o Immobiliser
EB1 B±R
B±R (*1)
B±R (*4)
IK17
55
7
ID1
7 W±B
W±B
DI±184
± DIAGNOSTICSENGINE (5S±FE)
419 Author: Date:
WIRING DIAGRAM
Page 2605 of 4770
± DIAGNOSTICSENGINE (5S±FE)
DI±185
420 Author: Date:
INSPECTION PROCEDURE
TOYOTA hand±held tester:
1 Connect TOYOTA hand±held tester, and check operation of fuel pump
(See page DI±3).
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI±28).
NG
2 Check for ECM power source circuit (See page DI±179).
NG Repair or replace.
OK
3 Check circuit opening relay (Marking: CIR OPN) (See page SF±41).
NG Replace circuit opening relay.
OK
Page 2606 of 4770
A03029A03450
FC (+) ON
w/o Immobiliser
w/ Immobiliser
FC (+)
DI±186
± DIAGNOSTICSENGINE (5S±FE)
421 Author: Date:
4 Check voltage between terminal FC of ECM connector and body ground.
PREPARATION:
(a) Remove the glove compartment (See page SF±64).
(b) Turn the ignition switch ON.
CHECK:
Measure voltage between terminal FC of the ECM connector
and body ground.
OK:
Voltage 9 ~ 14 V
OK Go to step 5.
NG
Check for open in harness and connector between EFI main relay, and circuit opening relay and
circuit opening relay and ECM (See page IN±31).
5 Check fuel pump (See page SF±6).
NG Repair or replace fuel pump.
OK
Page 2607 of 4770
A03030A03451
ON
FC
OFFON
Fuel Inlet Hose
FC
OFF
ON w/o Immobiliser
w/ Immobiliser
± DIAGNOSTICSENGINE (5S±FE)
DI±187
422 Author: Date:
6 Check for open in harness and connector between circuit opening relay (Mark-
ing: CIR OPN) and fuel pump, and fuel pump and body ground
(See page IN±31).
NG Repair or replace harness or connector.
OK
Check and replace ECM (See page IN±31).
OBD II scan tool (excluding TOYOTA hand±held tester):
1 Check operation of fuel pump.
PREPARATION:
(a) Remove the glove compartment (See page SF±64).
(b) Turn the ignition switch ON.
CHECK:
(a) Connect between terminal FC of the ECM connector and
body ground.
(b) Check for fuel pressure in the fuel inlet hose when it is
pinched off.
OK:
There is pressure in fuel inlet hose.
HINT:
At this time, you will hear a fuel return flowing noise.
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI±28).
NG
Page 2608 of 4770
DI±188
± DIAGNOSTICSENGINE (5S±FE)
423 Author: Date:
2 Check for ECM power source circuit (See page DI±179).
NG Repair or replace.
OK
3 Check circuit opening relay (Marking: CIR OPN) (See page SF±41).
NG Replace circuit opening relay.
OK
4 Check voltage between terminal FC of ECM connector and body ground
(See page DI±183, step 4).
OK Go to step 5.
NG
Check for open in harness and connector between EFI main relay and circuit opening relay, and
circuit opening relay and ECM (See page IN±31).
5 Check fuel pump (See page SF±6).
NG Repair or replace fuel pump.
OK