Toyota FJ Cruiser (GSJ 10, 15 series). Instruction — part 78
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES–267
ES
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Read freeze frame data using an intelligent tester. Freeze frame data record the engine condition when
malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was
moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other
data, from the time the malfunction occurred.
(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
1
CHECK FUSE (EFI FUSE)
EFI
Battery
ECM
BATT
E1
2
1
3
E47
1
B3
A133422E01
EFI Fuse
Engine Room R/B:
A133436E01
CHECK FOR SHORT IN ALL HARNESSES
AND CONNECTORS CONNECTED TO FUSE
AND REPLACE FUSE
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1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
(a) Measure the voltage between the terminals of the B3
and E47 ECM connectors.
Standard Voltage
NG
OK
(a) Check the harness and the connector between the EFI
fuse and ECM.
(1) Remove the EFI fuse 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) Reconnect the ECM connector.
(5) Reinstall the EFI fuse.
(b) Check the harness and the connector between the EFI
fuse and battery.
(1) Remove the EFI fuse from the engine room R/B.
(2) Disconnect the positive battery terminal.
(3) Check the resistance.
Standard Resistance (Check for open)
Standard Resistance (Check for short)
(4) Reconnect the positive battery terminal.
(5) Reinstall the EFI fuse.
2
INSPECT ECM (BATT VOLTAGE)
B3
E47
E1 (-) BATT (+)
ECM Connector
G100798E11
Tester Connections
Specified Conditions
BATT (E47-3) - E1 (B3-1)
11 to 14 V
Go to step 3
REPLACE ECM (See page
)
3
CHECK HARNESS AND CONNECTOR (ECM - EFI FUSE, EFI FUSE - BATTERY)
1
2
EFI Fuse
Engine Room R/B:
ECM Connector
BATT
E47
A133447E01
Tester Connections
Specified Conditions
EFI fuse (2) - BATT (E47-3)
Below 1
Ω
Tester Connections
Specified Conditions
EFI fuse (2) or BATT (E47-3) - Body ground
10 k
Ω or higher
Tester Connections
Specified Conditions
Battery positive terminal - EFI fuse (1)
Below 1
Ω
Tester Connections
Specified Conditions
Battery positive terminal or EFI fuse (1) - Body
ground
10 k
Ω or higher
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES–269
ES
NG
OK
(a) Check that the battery is not depleted.
OK:
Battery is not depleted.
NG
OK
REPAIR OR REPLACE HARNESS OR
CONNECTOR
4
INSPECT BATTERY
REPLACE BATTERY
CHECK AND REPLACE ENGINE ROOM RELAY BLOCK
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1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
DESCRIPTION
The ECM continuously monitors its own internal memory status, internal circuits, and output signals
transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any
malfunction is detected, the ECM sets the appropriate DTC and illuminates the MIL.
The ECM memory status is diagnosed by internal mirroring of the main CPU and the sub CPU to detect
Random Access Memory (RAM) errors. The two CPUs also perform continuous mutual monitoring. The
ECM illuminates the MIL and sets a DTC if: 1) outputs from the two CPUs are different or deviate from the
standards, 2) the signals sent to the throttle actuator deviate from the standards, 3) a malfunction is found
in the throttle actuator supply voltage, and 4) any other ECM malfunction is found.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
ECM RAM errors (P0604):
ECM CPU range check (P0606):
DTC
P0604
Internal Control Module Random Access Mem-
ory (RAM) Error
DTC
P0606
ECM / PCM Processor
DTC
P0607
Control Module Performance
DTC
P0657
Actuator Supply Voltage Circuit / Open
DTC No.
DTC Detection Conditions
Trouble Areas
P0604
P0606
P0607
P0657
ECM internal error (1 trip detection logic)
ECM
Related DTCs
P0604: ECM RAM error
P0606: ECM range check
P0607: ECM CPU malfunction
P0657: ETCS power supply
Required Sensors/Components (Main)
ECM
Required Sensors/Components (Related)
-
Frequency of Operation
Once per driving cycle: P0657
Continuous: P0604, P0606, P0607
Duration
P0604: 6 times or more
P0606, P0607 and P0657: Within 1 second
MIL Operation
Immediate
Sequence of Operation
None
Monitor runs whenever following DTCs not present
None
RAM mirror check
fail
Either of following conditions met:
-
Difference between throttle valve position of main CPU and throttle valve position of sub CPU
0.3 V or more
Difference between accelerator pedal position of main CPU and accelerator pedal position of sub CPU
0.3 V or more
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