Toyota Celica 2005, Руководство по ремонту

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+25 %
− 12.5 %
More than 0.5 V
Less than 0.4 V
Case 1
Case 2
Case 3
Case 4
Output voltage of heated oxygen
sensor (sensor 1: front sensor)
Injection volume
Output voltage
Output voltage of heated oxygen
sensor (sensor 2: rear sensor) Mainly suspected
trouble area
OK
+25 %
− 12.5 %
More than 0.5 V
Less than 0.4 V
Injection volume
Output voltage
+25 %
− 12.5 %
More than 0.5 V
Less than 0.4 V
Injection volume
Output voltage
Sensor 1: front sensor
(sensor 1, heater, sensor 1
circuit)
+25 %
− 12.5 %
More than 0.5 V
Less than 0.4 V
Injection volume
Output voltage
+25 %
− 12.5 %
Injection volume
Output voltage
NG
+25 %
− 12.5 %
Injection volume
Output voltage
NG
+25 %
− 12.5 %
Injection volume
Output voltage
NG
+25 %
− 12.5 %
Injection volume
Output voltage
NG
Extremely rich or lean actual
air
− fuel ratio
(Injector, fuel pressure, gas
leakage in exhaust system,
etc.)
OK
OK
OK
Almost
no reaction
⎯
Sensor 2: rear sensor
(sensor 2, heater, sensor 2
circuit)
Almost
no reaction
Almost
no reaction
Almost
no reaction
− DIAGNOSTICS ENGINE (2ZZ − GE)
DI − 433
2005 CELICA (RM1131U)
NOTICE:
There is a delay of few seconds in the sensor 1 (front sensor) output, and there is about 20 seconds
delay at maximum in the sensor 2 (rear sensor).
The following of the A/F CONTROL procedure enables the technician to check and graph the voltage out-
puts of both the heated oxygen sensors.
For displaying the graph indication, enter ”ACTIVE TEST / A/F CONTROL / USER DATA,” then select ”O2S
B1S1 and O2S B1S2” by pressing ”YES” button and push ”ENTER” button before pressing ”F4” button.
HINT:
S
If different DTCs related to different systems that have terminal E2 as the ground terminal are output
simultaneously, terminal E2 may be open.
S
Read freeze frame data using the hand−held tester or the OBD II scan tool . Freeze frame data records
the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can
help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air
− fuel
ratio was lean or rich, as well as other data from the time when a malfunction occurred.
S
A high heated oxygen sensor (sensor 1) voltage (0.5 V or more) could be caused by a rich air fuel mix-
ture. Check for conditions that would cause the engine to run rich.
S
A low heated oxygen sensor (sensor 1) voltage (0.4 V or less) could be caused by a lean air fuel mix-
ture. Check for conditions that would cause the engine to run lean.
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