Toyota 2GR-FE Manual page 357

TYPICAL ENABLING CONDITIONS
Fuel-trim:
The monitor will run whenever these DTCs are not
present
Fuel system status
Battery voltage
Either of following conditions is met
1. Engine RPM
2. Intake air amount per revolution
TYPICAL MALFUNCTION THRESHOLDS
Fuel trim:
EVAP purge-cut
Either of following conditions met
1. Average between short-term fuel trim and long-term
fuel trim
2. Average between short-term fuel trim and long-term
fuel trim
WIRING DIAGRAM
Refer to DTC P2195 (See page ES-350).
INSPECTION PROCEDURE
HINT:
For use of the intelligent tester only:
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 the intelligent
tester.
1. Connect the 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 on the tester: DIAGNOSIS / ENHANCEDOBD 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.
HINT:
• The A/F CONTROL operation lowers the fuel injection volume by 12.5% or increases the injection
volume by 25%.
• Each sensor reacts in accordance with increases and decreases in the fuel injection volume.
Standard voltage
Tester Display (Sensor)
AFS B1S1 or AFS B2S1 (A/F)
AFS B1S1 or AFS B2S1 (A/F)
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
P0010, P0020 (VVT VSV1, 2), P0011, P0012 (VVT System-Advance, Retard),
P0021, P0022(VVT System2-Adavance, Retard), P0031, P0031, P0032, P0051,
P0052 (A/F Sensor heater Sensor 1), P0100, P0101, P0102, P0103 (MAF Sensor),
P0115, P0116, P0117, P0118 (ECT Sensor), P0120, P0121, P0122, P0123, P0220,
P0222, P0223 , P2135 (TP Sensor), P0125 (Insufficient ECT for Closed Loop),
P0335 (CKP Sensor), P0340, P0342, P0343, P0345 (VVT Sensor 1, 2), P0351,
P0352, P0353, P0354, P0356 (Ignitor), P0500 (VSS),
Closed-loop
11 V or more
Condition 1 or 2
Less than 1,100 rpm
0.22 g/rev or more
Executing
Condition 1 or 2
35% or more at 80°C (176°F) of ECT
-35% or less at 80°C (176°F) of ECT
Injection Volumes
+25%
-12.5%
Status
Rich Less than 3.0
Lean More than 3.35
ES–201
ES
Voltages