Toyota FJ Cruiser (GSJ 10, 15 series). Manual — part 109
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1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES–391
ES
(a) Remove the IGN fuse from the driver side J/B.
(b) Check the IGN fuse resistance.
Standard Resistance:
Below 1
Ω
(c) Reinstall the IGN fuse.
NG
OK
(a) Disconnect the A1 ignition switch connector.
(b) Check the resistance.
Standard Resistance
(c) Reconnect the ignition switch connector.
NG
OK
(a) Turn the ignition switch ON.
(b) Measure the voltage between the terminals of the B3
and E47 ECM connectors.
Standard Voltage
NG
4
CHECK FUSE (IGN FUSE)
IGN Fuse
Driver Side J/B:
A133441E01
CHECK FOR SHORT IN ALL HARNESSES
AND CONNECTORS CONNECTED TO FUSE
AND REPLACE FUSE
5
INSPECT IGNITION OR STARTER SWITCH ASSEMBLY
Component Side:
Ignition Switch
A056879E34
Ignition Switch
Positions
Tester Connections
Specified Conditions
LOCK
All Terminals
10 k
Ω or higher
ACC
2 - 4
Below 1
Ω
ON
1 - 2, 1 - 4, 5 - 6
START
1 - 3, 1 - 4, 3 - 4, 5 - 6, 5 -
7, 6 - 7
REPLACE IGNITION OR STARTER SWITCH
ASSEMBLY (See page
)
CHECK AND REPLACE HARNESS AND CONNECTOR (BATTERY - IGNITION SWITCH, IGNITION
SWITCH - ECM)
6
INSPECT ECM (MREL VOLTAGE)
B3
E47
E1 (-)
MREL(+)
ECM Connector
G100798E10
Tester Connections
Specified Conditions
MREL (E47-8) - E1 (B3-1)
11 to 14 V
REPLACE ECM (See page
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ES–392
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
OK
(a) Remove the EFI fuse from the engine room R/B.
(b) Check the EFI fuse resistance.
Standard Resistance:
Below 1
Ω
(c) Reinstall the EFI fuse.
NG
OK
(a) Remove the EFI relay from the engine room R/B.
(b) Check the EFI relay resistance.
Standard Resistance
(c) Reinstall the EFI relay.
NG
OK
7
CHECK FUSE (EFI FUSE)
EFI Fuse
Engine Room R/B:
A133436E02
CHECK FOR SHORT IN ALL HARNESSES
AND CONNECTORS CONNECTED TO FUSE
AND REPLACE FUSE
8
INSPECT EFI RELAY
B016200E02
Tester Connections
Specified Conditions
3 - 5
10 k
Ω or higher
Below 1
Ω
(when battery voltage applied to terminals 1 and 2)
REPLACE EFI RELAY
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1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES–393
ES
(a) Check the harness and connector between the EFI relay
and ECM.
(1) Remove the EFI relay from the engine room R/B.
(2) Disconnect the E47 ECM connector.
(3) Check the resistance.
Standard Resistance (Check for open)
Standard Resistance (Check for short)
(4) Reinstall the EFI relay.
(5) Reconnect the ECM connector.
(b) Check the harness and connector between the EFI relay
and body ground.
(1) Remove the EFI relay from the engine room R/B.
(2) Check the resistance.
Standard Resistance (Check for open)
(3) Reinstall the EFI relay.
NG
OK
9
CHECK HARNESS AND CONNECTOR (EFI RELAY- ECM, EFI RELAY - BODY GROUND)
1
2
5
3
Engine Room R/B:
EFI Relay
ECM Connector
E47
MREL
A133471E01
Tester Connections
Specified Conditions
EFI relay (1) - MREL (E47-8)
Below 1
Ω
Tester Connections
Specified Conditions
EFI relay (1) or MREL (E47-8) - Body ground
10 k
Ω or higher
Tester Connections
Specified Conditions
EFI relay (2) - Body ground
Below 1
Ω
REPAIR OR REPLACE HARNESS OR
CONNECTOR
CHECK AND REPAIR HARNESS AND CONNECTOR (TERMINAL +B OF ECM - BATTERY
POSITIVE TERMINAL)
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ES–394
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
DESCRIPTION
The ECM constantly generates 5 V power from the battery voltage supplied to the +B (BATT) terminal to
operate the microprocessor. The ECM also provides this power to the sensors through the VC output
circuit.
When the VC circuit is short-circuited, the microprocessor in the ECM and sensors that are supplied
power through the VC circuit are inactivated because the power is not supplied from the VC circuit. Under
this condition, the system does not start up and the MIL does not illuminate even if the system
malfunctions.
HINT:
Under normal conditions, the MIL is illuminated for several seconds when the ignition switch is first turned
ON. The MIL goes off when the engine is started.
VC Output Circuit
5 V Constant Voltage Circuit
Microprocessor
From EFI Fuse
From EFI Relay
BATT
Throttle Position Sensor, Accelerator
Pedal Position Sensor, etc. (Sensors
which have IC)
Engine Coolant Temperature Sensor,
Intake Air Temperature Sensor, etc.
R
+B
VCTA, VCPA,
VCP2
ECM
A116143E09
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