Toyota 2GR-FE, Руководство пользователя

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2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES–259
ES
1. Connect the intelligent tester to the DLC3 (Procedure "A").
2. Start the engine and warm it up with all the accessories switched OFF, until the engine coolant
temperature stabilizes (Procedure "B").
3. Run the engine at an engine speed of between 2,500 rpm and 3,000 rpm for at least 3 minutes
(Procedure "C").
4. While running the engine at 3,000 rpm for 2 seconds and 2,000 rpm for 2 seconds, check the
waveforms of the A/F and HO2 sensors using the tester or scan tool (Procedure "D").
NOTICE:
The Air-Fuel Ratio (A/F) sensor has an output delay of a few seconds and the Heated Oxygen
(HO2) sensor has a maximum output delay of approximately 20 seconds.
Case
A/F Sensor (Sensor 1)
Output Voltage
HO2 Sensor (Sensor 2)
Output Voltage
Main Suspected
Trouble Area
1
Injection Volume
+25 %
-12.5 %
Injection Volume
+25 %
-12.5 %
-
Output Voltage
More than 3.35 V
Less than 3.0 V
Output Voltage
More than 0.55 V
Less than 0.4 V
2
Injection Volume
+25 %
-12.5 %
Injection Volume
+25 %
-12.5 %
• A/F sensor
• A/F sensor heater
• A/F sensor circuit
Output Voltage
Almost
no reaction
Output Voltage
More than 0.55 V
Less than 0.4 V
3
Injection Volume
+25 %
-12.5 %
Injection Volume
+25 %
-12.5 %
• HO2 sensor
• HO2 sensor heater
• HO2 sensor circuit
Output Voltage
More than 3.35 V
Less than 3.0 V
Output Voltage
Almost
no reaction
4
Injection volume
+25 %
-12.5 %
Injection Volume
+25 %
-12.5 %
• Fuel pressure
• Gas leakage from
exhaust system
(Air-fuel ratio
extremely lean or
rich)
Output Voltage
Almost
no reaction
Output Voltage
Almost
no reaction
(C)
Engine Speed
3,000 rpm
2,000 rpm
Idling
Engine Switch Off
(A)
(B)
(D)
(D)
Warming up At least 3 minutes
2 seconds
Check
Time
A093766E21