1GR-FE ENGINE CONTROL SYSTEM SFI SYSTEM

Transcription

1 348 DTC DTC P200 P203 /F Sensor Circuit Slow Response (ank 1 Sensor 1) /F Sensor Circuit Slow Response (ank 2 Sensor 1) DTC P200 indicates malfunctions related to the bank 1 /F sensor. DTC P203 indicates malfunctions related to the bank 2 /F sensor. ank 1 refers to the bank that includes cylinder No. 1. ank 2 refers to the bank that includes cylinder No. 2. Sensor 1 refers to the sensor mounted in front of the Three-Way Catalytic Converter (TWC) and located near the engine assembly. DCRIPTION Refer to DTC P2195 (See page -304). DTC No. DTC Detection Conditions Trouble reas P200 P203 Calculated value for air-fuel ratio (/F) sensor response rate deterioration level is less than threshold Open or short in /F sensor (bank 1, 2 sensor 1) circuit /F sensor ECM MONITOR DCRIPTION fter engine is warmed up, the ECM performs air-fuel ratio feedback control to maintain the air-fuel ratio at the stoichiometric level. In addition, active /F ratio control is performed for approximately 10 seconds after preconditions are met in order to measure the /F sensor response rate. During active /F ratio control, the ECM forcibly increases and decreases the injection volume a certain amount, based on the stoichiometric air-fuel ratio learned during normal air-fuel ratio control, and measures the /F sensor response rate. The ECM receives a signal from the /F sensor while performing active /F ratio control and uses it to calculate the /F sensor response rate deterioration level. If the value for /F sensor response rate deterioration level is less than the threshold, the ECM interprets this as a malfunction and sets the DTC.

2 349 ir-fuel Ratio Sensor Output 10 Seconds ON ctive /F Control OFF Normal Malfunction /F Sensor Output Fuel Injection Volume Increase Decrease E04 CONFIRMTION DRIVING PTTERN Performing this confirmation pattern will activate the /F sensor response monitor. Vehicle Speed etween 40 and 120 km/h (25 and 75 mph) (h) Idling (g) Ignition Switch OFF Warming up 3 minutes Time E02

3 350 Tester Display G034992E02 (a) Connect an intelligent tester to the DLC3. (b) Turn the ignition switch ON. (c) Turn the tester ON. (d) Clear DTCs (See page -38). (e) Select the following menu items: DIGNOSIS /ENHNCED OD II / MONITOR INFO / MONITOR RULT. (f) Check that FS 1 is INCOMPL. (g) Start the engine and warm it up. (h) Drive the vehicle at between 25 mph and 75 mph (40 km/h and 120 km/h) for 3 minutes. However, the vehicle should be driven at a constant speed. (i) Check the monitor result values on an intelligent tester by selecting the following menu items: DIGNOSIS / ENHNCED OD II / MONITOR INFO / TT RULT. (j) If the values indicated on the tester do not change, perform REDINS MONITOR DRIVE PTTERN for the /F sensor and the heated oxygen sensor (See page -23). Completion of all /F sensor monitors is required to change the value in TT RULT. (k) Note the value of the Monitor Result. (l) Select the following menu items: DIGNOSIS / ENHNCED OD II / DTC INFO / PENDING COD. (m) Check if any DTCs (any pending DTCs) are set. MONITOR STRTEGY Related DTCs Required Sensors/Components (Main) Required Sensors/Components (Related) Frequency of Operation Duration MIL Operation Sequence of Operation P200: /F sensor (ank 1) slow response P203: /F sensor (ank 2) slow response /F sensor Vehicle speed sensor, Crankshaft position sensor Once per driving cycle 10 to 15 seconds 2 driving cycles None TYPICL ENLING CONDITIONS Monitor runs whenever following DTCs not present P0031, P0032, P0051, P0052 (/F sensor heater - Sensor 1) P P0103 (MF meter) P P0113 (IT sensor) P P0118 (ECT sensor) P P0223, P2135 (TP sensor) P0125 (Insufficient ECT for Closed Loop) P0171, P0172 (Fuel system) P P0306 (Misfire) P0335 (CKP sensor) P0340, P0341 (CMP sensor) P P0456 (EVP system) P0500 (VSS) P2196, P2198 (/F sensor - rationality)

4 351 /F sensor active control Executing Engine coolant temperature 75 C (167 F) or more attery voltage 11 V or more Malfunction determination in this driving cycle Not yet Fuel-cut OFF Engine RPM Less than 4,000 rpm /F sensor status ctivated Delay time after fuel-cut ended 5 seconds or more Engine load 10 to 70 % Estimated catalyst temperature 500 to 800 C (932 to 1,472 F) Shift position 2 or more Intake air amount 3 to 10.5 g/sec TYPICL MLFUNCTION THRHOLDS Response rate deterioration level Less than 0.2 V MONITOR RULT Detailed information on Checking Monitor Status (See page -19). WIRING DIGRM Refer to DTC P2195 (See page -309). Malfunctioning areas can be identified by performing the /F CONTROL function provided in the CTIVE TT. The /F CONTROL function can help to determine whether the ir-fuel Ratio (/F) sensor, Heated Oxygen (HO2) sensor and other potential trouble areas are malfunctioning. The following instructions describe how to conduct the /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: DIGNOSIS / ENHNCED OD II / CTIVE TT / /F CONTROL. (5) Perform the /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 /F and HO2 sensors (FS 1S1 and O2S 1S2 or FS 2S1 and O2S 2S2) displayed on the tester. The /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 Tester Display (Sensor) FS 1S1 or FS 2S1 (/F) FS 1S1 or FS 2S1 (/F) O2S 1S2 or O2S 2S2 (HO2) O2S 1S2 or O2S 2S2 (HO2) Injection Volumes Status Voltages Rich Less than 3.0 Lean More than 3.35 Rich More than 0.55 Lean Less than 0.4

5 352 NOTICE: The ir-fuel Ratio (/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 /F Sensor (Sensor 1) Output Voltage HO2 Sensor (Sensor 2) Output Voltage Main Suspected Trouble rea 1 More than 3.35 V Less than 3.0 V More than 0.55 V Less than 0.4 V - 2 lmost no reaction /F sensor More than 0.55 V Less than 0.4 V /F sensor heater /F sensor circuit 3 More than 3.35 V Less than 3.0 V HO2 sensor HO2 sensor heater HO2 sensor circuit lmost no reaction 4 lmost no reaction lmost no reaction Injector Fuel pressure Gas leakage from exhaust system (ir-fuel ratio extremely lean or rich) To display the graph, select the following menu items on the tester: DIGNOSIS / ENHNCED OD II / CTIVE TT / /F CONTROL / USER DT / FS 1S1 and O2S 1S2 or FS 2S1 and O2S 2S2, and press the Y button and then the ENTER button followed by the F4 button. Following the /F CONTROL procedure enables technicians to check and graph the voltage outputs of both the /F and HO2 sensors. DTC P200 or P203 may be also set, when the air-fuel ratio is stuck rich or lean. low /F sensor voltage could be caused by a rich air-fuel mixture. Check for conditions that would cause the engine to run rich. high /F sensor voltage could be caused by a lean air-fuel mixture. Check for conditions that would cause the engine to run lean. Read freeze frame data using an intelligent tester. Freeze frame data record the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, 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. 1 CHECK NY OTHER DTCS OUTPUT (IN DDITION TO DTC P200 ND/OR P203) (a) (b) (c) Connect an intelligent tester to the DLC3. Turn the ignition switch ON. Turn the tester ON.

6 353 Result (d) Select the following menu items: DIGNOSIS / ENHNCED OD II / DTC INFO / CURRENT COD. (e) Read DTCs. Display (DTC Output) P200 and/or P203 P200 and/or P203 and other DTCs Proceed To If any DTCs other than P200 or P203 are output, troubleshoot those DTCs first. GO TO DTC CHRT 2 INSPECT IR FUEL RTIO SENSOR (HETER RISTNCE) Component Side: /F Sensor 4 ank ank 2 F- Front View HT F E46 (a) (b) (c) NG Disconnect the 4 or 5 /F sensor connector. Measure the resistance between the terminals of the /F sensor connector. Standard Resistance Tester Connections HT (1) - + (2) HT (1) - F- (4) Reconnect the /F sensor connector. Specified Conditions 1.8 to 3.4 Ω at 20 C (68 F) 10 kω or higher REPLCE IR FUEL RTIO SENSOR OK

7 354 3 CHECK HRNS ND CONNECTOR (/F SENSOR - ECM) Wire Harness Side: HT 4 ank 1 5 ank 2 F+ /F Sensor Connector ECM Connector + Front View F- (a) (b) (c) (d) (e) (f) Disconnect the 4 or 5 /F sensor connector. Turn the ignition switch ON. Measure the voltage between the + terminal of the /F sensor connector and body ground. Standard Voltage Tester Connections + (4-2) - ody ground + (5-2) - ody ground Specified Conditions 9 to 14 V Turn the ignition switch OFF. Disconnect the E5 ECM connector. Check the resistance. Standard Resistance (Check for open) E5 Tester Connections HT (4-1) - H1 (E5-2) Specified Conditions F+ (4-3) - 1+ (E5-22) H1 H E07 F- (4-4) - 1- (E5-30) HT (5-1) - H2 (E5-1) F+ (5-3) - 2+ (E5-23) F- (5-4) - 2- (E5-31) elow 1 Ω Standard Resistance (Check for short) Tester Connections HT (4-1) or H1 (E5-2) - ody ground F+ (4-3) or 1+ (E5-22) - ody ground F- (4-4) or 1- (E5-30) - ody ground HT (5-1) or H2 (E5-1) - ody ground F+ (5-3) or 2+ (E5-23) - ody ground F- (5-4) or 2- (E5-31) - ody ground Specified Conditions 10 kω or higher (g) (h) Reconnect the ECM connector. Reconnect the /F sensor connector.

8 355 Reference (ank 1 Sensor 1 System Diagram) /F Sensor Heater Relay /F Sensor ECM From attery From EFI Relay /F Heater Fuse EFI No.2 Fuse Heater Sensor H Duty Control E02 NG REPIR OR REPLCE HRNS OR CONNECTOR OK 4 PERFORM CONFIRMTION DRIVING PTTERN NEXT 5 CHECK WHETHER DTC OUTPUT RECURS (DTC P200 ND/OR P203) Result (a) Connect an intelligent tester to the DLC3. (b) Turn the ignition switch ON and turn the tester ON. (c) Select the following menu items: DIGNOSIS / ENHNCED OD II / DTC INFO / CURRENT COD. (d) Read DTCs. Display (DTC Output) P200 and/or P203 No output Proceed To CHECK FOR INTERMITTENT PROLEMS

9 356 6 REPLCE IR FUEL RTIO SENSOR NEXT 7 PERFORM CONFIRMTION DRIVING PTTERN NEXT 8 CHECK WHETHER DTC OUTPUT RECURS (DTC P200 ND/OR P203) (a) Connect an intelligent tester to the DLC3. (b) Turn the ignition switch ON and turn the tester ON. (c) Select the following menu items: DIGNOSIS / ENHNCED OD II / DTC INFO / CURRENT COD. (d) Read DTCs. Result Display (DTC Output) No output P200 and/or P203 Proceed To CHECK EXTREMLY RICH OR LEN CTUL IR FUEL RTIO (REFER TO DTC P0171 PROCEDURE) END