Toyota FJ Cruiser (GSJ 10, 15 series). Instruction — part 98
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES–347
ES
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
INSPECTION PROCEDURE
HINT:
•
DTC P2610 is set if an internal ECM problem is detected. Diagnostic procedures are not required.
ECM replacement is necessary.
•
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) Replace the ECM (See page
NEXT
(a) Connect an intelligent tester to the DLC3.
(b) Turn the ignition switch ON.
(c) Turn the tester ON.
(d) Clear DTCs (See page
).
(e) Start the engine and wait for 10 minutes or more.
(f)
Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DTC / INFO / PENDING CODES.
(g) If no pending DTC is displayed, the repair has been
successfully completed.
NEXT
Duration
10 minutes
MIL Operation
2 driving cycles
Sequence of Operation
None
Monitor runs whenever following DTC not present
None
Ignition switch
ON
Engine
Running
Battery voltage
8 V or more
Starter
OFF
Soak timer measurement when ECM CPU clock counts 10 minutes
Less than 7 minutes, or more than 13 minutes
1
REPLACE ECM
2
CHECK WHETHER DTC OUTPUT RECURS (DTC P2610)
END
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1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
HINT:
•
DTC P2A00 indicates malfunctions related to the bank 1 A/F sensor.
•
DTC P2A03 indicates malfunctions related to the bank 2 A/F sensor.
•
Bank 1 refers to the bank that includes cylinder No. 1.
•
Bank 2 refers to the bank that includes cylinder No. 2.
•
Sensor 1 refers to the sensor mounted in front of the Three-Way Catalytic Converter (TWC) and
located near the engine assembly.
DESCRIPTION
Refer to DTC P2195 (See page
).
MONITOR DESCRIPTION
After engine is warmed up, the ECM performs air-fuel ratio feedback control to maintain the air-fuel ratio
at the stoichiometric level. In addition, active A/F control is performed for approximately 10 seconds after
preconditions are met in order to measure the A/F sensor response rate. During active A/F control, the
ECM forcibly increases and decreases the injection volume a certain amount, based on the stoichiometric
air-fuel ratio learned during normal air-fuel ratio control, and measures the A/F sensor response rate. The
ECM receives a signal from the A/F sensor while performing active A/F control and uses it to calculate the
A/F sensor response rate deterioration level.
If the value for A/F sensor response rate deterioration level is less than the threshold, the ECM interprets
this as a malfunction and sets the DTC.
DTC
P2A00
A/F Sensor Circuit Slow Response (Bank 1
Sensor 1)
DTC
P2A03
A/F Sensor Circuit Slow Response (Bank 2
Sensor 1)
DTC No.
DTC Detection Conditions
Trouble Areas
P2A00
P2A03
Calculated value for air-fuel ratio (A/F) sensor response rate
deterioration level is less than threshold
•
Open or short in A/F sensor (bank 1, 2 sensor 1) circuit
•
A/F sensor
•
A/F sensor heater
•
ECM
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES–349
ES
CONFIRMATION DRIVING PATTERN
HINT:
Performing this confirmation pattern will activate the A/F sensor response monitor.
Air-Fuel Ratio Sensor Output
Active A/F Control
A/F Sensor Output
Normal
Malfunction
10 Seconds
Fuel Injection Volume
Increase
Decrease
ON
OFF
A115363E04
Ignition Switch OFF
Idling
Between
25 and 75 mph
(40 and 120 km/h)
Vehicle Speed
(g)
(h)
Warming up
3 minutes
Time
A115372E45
ES–350
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
(a) Connect an intelligent tester to the DLC3.
(b) Turn the ignition switch ON.
(c) Turn the tester ON.
(d) Clear DTCs (See page
(e) Select the following menu items: DIAGNOSIS /ENHANCED OBD II / MONITOR INFO / MONITOR
RESULT.
(f) Check that RES RATE B1S1 and RES RATE B2S1 are INCOMPL.
(g) Start the engine and warm it up.
(h) Drive the vehicle at between 25 mph and 75 mph (40 km/h and 120 km/h) for 3 minutes. However, the
vehicle should be driven at a constant speed.
(i) Check the monitor result values on an intelligent tester by selecting the following menu items:
DIAGNOSIS / ENHANCED OBD II / MONITOR INFO / MONITOR RESULT / RES RATE B1S1 and RES
RATE B2S1.
(j) If the values indicated on the tester do not change, perform READINESS MONITOR DRIVE PATTERN
for the A/F sensor and the heated oxygen sensor (See page
).
HINT:
Completion of all A/F sensor monitors is required to change the value in RES RATE B1S1 and RES RATE
B2S1.
(k) Note the value of the RES RATE B1S1 and RES RATE B2S1.
(l) Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / PENDING CODES.
(m) Check if any DTCs (any pending DTCs) are set.
MONITOR STRATEGY
Related DTCs
P2A00: A/F sensor (Bank 1) slow response
P2A03: A/F sensor (Bank 2) slow response
Required Sensors/Components (Main)
A/F sensor
Required Sensors/Components (Related)
Vehicle speed sensor, Crankshaft position sensor
Frequency of Operation
Once per driving cycle
Duration
10 to 15 seconds
MIL Operation
2 driving cycles
Sequence of Operation
None
Tester
Display
G034992E02
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