Toyota FJ Cruiser (GSJ 10, 15 series). Instruction — part 55
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES–175
ES
HINT:
The correct waveform is as shown.
MONITOR DESCRIPTION
The ECM illuminates the MIL and sets a DTC when either one of the following conditions, which could
cause emission deterioration, is detected (2 trip detection logic).
•
Within the first 1,000 crankshaft revolutions of the engine starting, an excessive misfiring rate
(approximately 20 to 50 misfires per 1,000 crankshaft revolutions) occurs once.
Conditions
Idling
Items
Contents
GND
GND
100 msec./DIV. (Idling)
1 msec./DIV. (Idling)
Injection Duration
20 V/DIV.
20 V/DIV.
Injector Signal Waveform
Magnification
A121608E01
ECM
Camshaft position sensor
Crankshaft position sensor
(36-2 teeth)
A121609E01
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1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
•
After the first 1,000 crankshaft revolutions, an excessive misfiring rate (approximately 20 to 50 misfires
per 1,000 crankshaft revolutions) occurs 4 times in sequential crankshaft revolutions.
The ECM flashes the MIL and sets a DTC when either one of the following conditions, which could cause
the Three-Way Catalytic Converter (TWC) damage, is detected (2 trip detection logic).
•
In every 200 crankshaft revolutions at a high engine rpm, the threshold misfiring percentage is
recorded once.
•
In every 200 crankshaft revolutions at a normal engine rpm, the threshold misfiring percentage is
recorded 3 times.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
Misfire:
Monitor period of emission-related-misfire:
Monitor period of catalyst-damaged-misfire (MIL blinks):
Related DTCs
P0300: Multiple cylinder misfire
P0301: Cylinder 1 misfire
P0302: Cylinder 2 misfire
P0303: Cylinder 3 misfire
P0304: Cylinder 4 misfire
P0305: Cylinder 5 misfire
P0306: Cylinder 6 misfire
Required Sensors/Components (Main)
Crankshaft position sensor and Camshaft position sensor
Required Sensors/Components (Related)
Engine coolant temperature and Intake air temperature sensors and
Mass air flow meter
Frequency of Operation
Continuous
Duration
1,000 to 4,000 crankshaft revolutions: Emission related misfire
200 to 600 crankshaft revolutions: Catalyst damaged misfire
MIL Operation
2 driving cycles: Emission related misfire
MIL flashes immediately: Catalyst damaged misfire
Sequence of Operation
None
Monitor runs whenever following DTCs not present
P0100 - P0103 (MAF meter)
P0110 - P0113 (IAT sensor)
P0115 - P0118 (ECT sensor)
P0120 - P0223, P2135 (TP sensor)
P0125 (Insufficient ECT for closed loop)
P0327 - P0333 (knock sensor)
P0335 (CKP sensor)
P0340 (CMP sensor)
P0500 (VSS)
Battery voltage
8 V or more
VVT system
Not operated by scan tool
Engine RPM
Manual Transmission: 450 to 5,400 rpm
Automatic Transmission: 400 to 5,400 rpm
Either of following conditions (a) or (b) met
-
(a) ECT at engine start
More than -7
°C (19°F)
(b) ECT
More than 20
°C (68°F)
Fuel cut
OFF
First 1,000 revolutions after engine start, or check mode
Crankshaft 1,000 revolutions
Except above
Crankshaft 1,000 revolutions x 4
All of following conditions 1, 2 and 3 met
Crankshaft 200 revolutions x 3
1. Driving cycles
1st
2. Check mode
OFF
3. Engine RPM
Less than 2,800 rpm
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES–177
ES
TYPICAL MALFUNCTION THRESHOLDS
Monitor period of emission-related-misfire:
Monitor period of catalyst-damage-misfire (MIL blinks):
MONITOR RESULT
Refer to CHECKING MONITOR STATUS (See page
WIRING DIAGRAM
CONFIRMATION DRIVING PATTERN
(a) Connect an intelligent tester to the DLC3.
(b) Turn the ignition switch ON.
(c) Turn the tester ON.
Except above
Crankshaft 200 revolutions
Misfire rate
2.9 % or more (Manual transmission)
2 % or more (Automatic transmission)
Number of misfires per 200 revolutions
77 or more (varies with intake air amount and RPM)
Paired cylinders misfire (MIL blinks immediately)
Detected
Battery
AM2
IG2
AM2
No. 1 Injector
No. 2 Injector
No. 3 Injector
No. 4 Injector
No. 5 Injector
No. 6 Injector
#10
#20
#30
#40
#50
#60
Ignition Switch
ECM
1
2
7
6
A1
B18
B9
B21
B10
B25
B11
2
2
1
2
1
2
1
2
1
2
1
2
1
B3
3
B3
4
B3
5
B3
6
B3
7
B3
A133415E02
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1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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(d) Record the DTC(s) and freeze frame data.
(e) Using the tester, switch the ECM from normal mode to check mode (See page
(f) Read the misfire counts of each cylinder (CYL #1 to #6) with the engine in an idling condition. If any
misfire count is displayed, skip the following confirmation driving pattern.
(g) Drive the vehicle several times with the conditions, such as engine rpm and engine load, shown in
MISFIRE RPM and MISFIRE LOAD in the DATA LIST.
HINT:
In order to store misfire DTCs, it is necessary to drive the vehicle for the period of time shown in the table
below, with the MISFIRE RPM and MISFIRE LOAD in the DATA LIST.
(h) Check whether misfires have occurred by checking DTCs and freeze frame data.
HINT:
Do not turn the ignition switch OFF until the stored DTC(s) and freeze frame data have been recorded.
When the ECM returns to normal mode (default), the stored DTC(s), freeze frame data and other data will
be erased.
(i) Record the DTC(s), freeze frame data and misfire counts.
(j) Turn the ignition switch OFF and wait for at least 5 seconds.
INSPECTION PROCEDURE
HINT:
•
If any DTCs other than the misfire DTCs are output, troubleshoot those DTCs first.
•
Read freeze frame data using an intelligent tester. Freeze frame data record the engine conditions
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.
•
If the misfire does not recur when the vehicle is brought to the workshop, reproduce the conditions
stored in the freeze frame data.
•
The misfire still cannot be reproduced even though the conditions stored in the freeze frame data have
been duplicated, one of the following factors is considered to be a possible cause of the problem:
(1) The fuel tank is low full.
(2) Improper fuel is used.
(3) The spark plugs have been contaminated.
(4) The problem is complex due to multiple factors.
•
After finishing repairs, check the misfire counts of the cylinders (CYL #1, #2, #3, #4, #5 and #6).
•
Be sure to confirm that no misfiring cylinder DTCs are set again by conducting the confirmation driving
pattern, after repairs.
•
For 6 and 8 cylinder engines, the ECM intentionally does not set the specific misfiring cylinder DTCs at
high engine RPM. If misfires occur only in high engine RPM areas, only DTC P0300 is set.
In the event of DTC P0300 being present, perform the following operations:
(1) Clear DTCs (See page
).
(2) Start the engine and conduct the confirmation driving pattern.
(3) Read the misfiring rates of each cylinder or DTC(s) using the tester.
(4) Repair the cylinder(s) that has a high misfiring rate or is indicated by the DTC.
(5) After finishing repairs, conduct the confirmation driving pattern again, in order to verify that DTC
P0300 is not set.
•
When one of SHORT FT #1, LONG FT #1, SHORT FT #2 or LONG FT #2 in the freeze frame data is
outside the range of +-20 %, the air-fuel ratio may be rich (-20 % or less) or lean (+20 % or more).
•
When the COOLANT TEMP in the freeze frame data is less than 75
°C (167°F), the misfires have
occurred only while warming up the engine.
Engine RPM
Duration
Idling
3.5 minutes or more
1,000
3 minutes or more
2,000
1.5 minutes or more
3,000
1 minute or more
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