Re:XE TOYOTA CAMRY 2000 BI NỔI ĐÈN CHECK
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INSPECTION PROCEDURE
HINT:
- Read freeze frame data using the intelligent tester. 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, and other data from the time the malfunction occurred. If DTC P0420 is displayed, check the bank 1 catalyst. If DTC P0430 is displayed, check the bank 2 catalyst. Bank 1 includes No. 1 cylinder, but bank 2 does not. No. 1 cylinder is located in the front part of the engine, opposite the transmission.
1. CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0420, P0430) [*] [class="ptxt"]Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
[/list] [*] [class="ptxt"]Turn the ignition switch ON and turn the tester ON.
[/list] [*] [class="ptxt"]Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
[/list] [*] [class="ptxt"]Read the DTCs.
Result: Display (DTC output)
Proceed to
P0420 or P0430
A
P0420 or P0430 and other DTCs
B
[/list]
B
GO TO RELEVANT DTC CHART
A
3. INSPECT HEATED OXYGEN SENSOR (RESISTANCE)
[*] [class="ptxt"]Disconnect the H9, H10, H19 and H20 sensor connectors.
[/list] [*] [class="ptxt"]Measure the resistance of the sensor.
Standard resistance (bank 1 sensor 1): Tester Connection
Specified Condition
1 (HTL) - 2 (+B)
11 to 16 Ω
1 (HTL) - 4 (E1)
10 kΩ or higher
Standard resistance (bank 2 sensor 1): Tester Connection
Specified Condition
1 (HTR) - 2 (+B)
11 to 16 Ω
1 (HTR) - 4 (E1)
10 kΩ or higher
Standard resistance (bank 1 sensor 2): Tester Connection
Specified Condition
1 (+B) - 2 (HT)
11 to 16 Ω
1 (+B) - 4 (OX)
10 kΩ or higher
Standard resistance (bank 2 sensor 2): Tester Connection
Specified Condition
1 (+B) - 2 (HT)
11 to 16 Ω
1 (+B) - 4 (OX)
10 kΩ or higher
[/list]
NG
REPLACE HEATED OXYGEN SENSOR
OK
HINT:
It is possible that the malfunctioning area can be found using the ACTIVE TEST A/F CONTROL operation. The ACTIVE TEST can determine if the heated oxygen sensor or other potential trouble areas are malfunctioning or not.The injection volume can be switched to -12.5% (decrease) or +25% (increase) by the ACTIVE TEST.The ACTIVE TEST procedure enables a technician to check and graph the output voltage of the heated oxygen sensors.
- Procedure:
- Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
- Turn the ignition switch ON.
- Warm up the engine by running the engine at 2,500 rpm for approximately 90 seconds.
- Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / A/F CONTROL.
- Perform the ACTIVE TEST while the engine is idling.
Standard:Heated oxygen sensor reacts in accordance with the increase and decrease of injection volume:
+25% → RICH output: More than 0.55 V
-12.5% → LEAN output: Less than 0.4 V
NOTICE:
The heated oxygen sensor (sensor 1) output has a few seconds of delay and the heated oxygen sensor (sensor 2) output has a maximum of 20 seconds of delay.If the vehicle is short on fuel, the air-fuel ratio becomes LEAN and the DTCs will be recorded. Case
Heated Oxygen Sensor (sensor 1) Voltage
Heated Oxygen Sensor (sensor 2) Voltage
Main Suspected Trouble Area
1
Injection Volume
+25%
-12.5%
Injection Volume
+25%
-12.5%
-
Heated Oxygen Sensor Voltage
0.55 V or more
Below 0.4 V
Heated Oxygen Sensor Voltage
0.5 V or more
Below 0.4 V
2
Injection Volume
+25%
-12.5%
Injection Volume
+25%
-12.5%
Heated oxygen sensor (sensor 1)
Heated oxygen sensor heater (sensor 1)
Heated Oxygen Sensor Voltage
Almost
no reaction
Heated Oxygen Sensor Voltage
0.5 V or more
Below 0.4 V
3
Injection Volume
+25%
-12.5%
Injection Volume
+25%
-12.5%
Heated oxygen sensor (sensor 2)
Heated oxygen sensor heater (sensor 2)
Heated Oxygen Sensor Voltage
0.55 V or more
Below 0.4 V
Heated Oxygen Sensor Voltage
Almost
no reaction
4
Injection Volume
+25%
-12.5%
Injection Volume
+25%
-12.5%
Injector fuel pressure, Exhaust gas leak, etc.
(air-fuel ratio is extremely LEAN or RICH)
Heated Oxygen Sensor Voltage
Almost
no reaction
Heated Oxygen Sensor Voltage
Almost
no reaction
NG
REPLACE HEATED OXYGEN SENSOR
OK
NOTICE:
Replace both the front catalyst and rear catalyst (front exhaust pipe) of the damaged bank.
NEXT
END