1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES–351
ES
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
MONITOR RESULT
Refer to CHECKING MONITOR STATUS (See page
ES-20
).
WIRING DIAGRAM
Refer to DTC P2195 (See page
ES-312
).
INSPECTION PROCEDURE
HINT:
Malfunctioning areas can be identified by performing the A/F CONTROL function provided in the ACTIVE
TEST. The A/F CONTROL function can help to determine whether the Air-Fuel Ratio (A/F) sensor, Heated
Oxygen (HO2) sensor and other potential trouble areas are malfunctioning.
The following instructions describe how to conduct the A/F CONTROL operation using an intelligent
tester.
(1) Connect an intelligent tester to the DLC3.
(2) Start the engine and turn the tester ON.
(3) Warm up the engine at an engine speed of 2,500 rpm for approximately 90 seconds.
(4) Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / A/F CONTROL.
(5) Perform the A/F CONTROL operation with the engine in an idling condition (press the RIGHT or LEFT
button to change the fuel injection volume).
(6) Monitor the voltage outputs of the A/F and HO2 sensors (AFS B1S1 and O2S B1S2 or AFS B2S1 and
O2S B2S2) displayed on the tester.
Monitor runs whenever following DTCs not present
P0031, P0032, P0051, P0052 (A/F sensor heater - Sensor 1)
P0100 - P0103 (MAF meter)
P0110 - P0113 (IAT sensor)
P0115 - P0118 (ECT sensor)
P0120 - P0223, P2135 (TP sensor)
P0125 (Insufficient ECT for Closed Loop)
P0171, P0172 (Fuel system)
P0300 - P0306 (Misfire)
P0335 (CKP sensor)
P0340, P0341 (CMP sensor)
P0455, P0456 (EVAP system)
P0500 (VSS)
P2196, P2198 (A/F sensor - rationality)
Active A/F control
Performing
Active A/F control performed when following conditions met
-
Battery voltage
11 V or more
Engine coolant temperature
75
°C (167°F) or more
Idling
OFF
Engine RPM
Less than 4,000 rpm
A/F sensor status
Activated
Fuel-cut
OFF
Engine load
10 to 70 %
Shift position
2 or more
Catalyst monitor
Not yet
Intake air amount
3 to 10.5 g/sec
Response rate deterioration level
Less than 0.2 V