30 GR-FE ENGINE CONTROL SYSTEM SFI SYSTEM DTC P95 Oxygen (/F) Sensor Signal Stuck Lean (Bank Sensor ) DTC P96 Oxygen (/F) Sensor Signal Stuck Rich (Bank Sensor ) DTC P97 Oxygen (/F) Sensor Signal Stuck Lean (Bank Sensor ) DTC P98 Oxygen (/F) Sensor Signal Stuck Rich (Bank Sensor ) lthough the DTC titles say oxygen sensor, these DTCs relate to the ir-fuel Ratio (/F) sensor. Sensor refers to the sensor mounted in front of the Three-Way Catalytic Converter (TWC) and located near the engine assembly. DCRIPTION The /F sensor generates a voltage * that corresponds to the actual air-fuel ratio. This sensor voltage is used to provide the ECM with feedback so that it can control the air-fuel ratio. The ECM determines the deviation from the stoichiometric air-fuel ratio level, and regulates the fuel injection time. If the /F sensor malfunctions, the ECM is unable to control the air-fuel ratio accurately. The /F sensor is the planar type and is integrated with the heater, which heats the solid electrolyte (zirconia element). This heater is controlled by the ECM. When the intake air volume is low (the exhaust gas temperature is low), a current flows into the heater to heat the sensor, in order to facilitate accurate oxygen concentration detection. In addition, the sensor and heater portions are narrower than the conventional type. The heat generated by the heater is conducted to the solid electrolyte though the alumina, therefore the sensor activation is accelerated. In order to obtain a high purification rate of the carbon monoxide (CO), hydrocarbon (HC) and nitrogen oxide (NOx) components in the exhaust gas, a TWC is used. For the most efficient use of the TWC, the air-fuel ratio must be precisely controlled so that it is always close to the stoichiometric level. * : Value changes inside the ECM. Since the /F sensor is the current output element, a current is converted in to a voltage inside the ECM. ny measurements taken at the /F sensor or ECM connectors will show a constant voltage.
GR-FE ENGINE CONTROL SYSTEM SFI SYSTEM 3 ECM Monitored /F Sensor Voltage lumina Heater Element Cover Solid Electrolyte (Zirconia Element) Platinum Electrode Exhaust Gas - Section tmospheric ir ir Fuel Ratio 0764E08 DTC No. DTC Detection Conditions Trouble reas P95 P97 P95 P97 P96 P98 P96 P98 Conditions (a) and (b) continue for 0 seconds or more ( trip detection logic) (a) ir-fuel Ratio (/F) sensor voltage more than 3.8 V (b) Heated Oxygen (HO) sensor voltage 0.5 V or more While fuel-cut operation performed (during vehicle deceleration), air-furl ratio (/F) sensor current 3.6 m or more for 3 seconds ( trip detection logic) Conditions (a) and (b) continue for 0 seconds or more ( trip detection logic) (a) /F sensor voltage less than.8 V (b) HO sensor voltage less than 0.6 V While fuel-cut operation performed (during vehicle deceleration), air-furl ratio (/F) sensor current less than.57 m for 3 seconds ( trip detection logic) Open or short in /F sensor (bank, sensor ) circuit /F sensor (bank, sensor ) /F sensor (bank, sensor ) heater /F sensor heater relay /F sensor heater and relay circuits ir induction system Fuel pressure Injector ECM /F sensor ECM Open or short in /F sensor (bank, sensor ) circuit /F sensor (bank, sensor ) /F sensor (bank, sensor ) heater /F sensor heater relay /F sensor heater and relay circuits ir induction system Fuel pressure Injector ECM /F sensor ECM DTCs P95 and P96 indicate malfunctions related to bank /F sensor circuit. DTCs P97 and P98 indicate malfunctions related to bank /F sensor circuit. Bank refers to the bank that includes cylinder No.. Bank refers to the bank that includes cylinder No.. When any of these DTCs are set, check the /F sensor voltage output by selecting the following menu items on an intelligent tester: DIGNOSIS / ENHNCED OBD II / DT LIST / PRIMRY / FS BS or FS BS. Short-term fuel trim values can also be read using an intelligent tester.
3 GR-FE ENGINE CONTROL SYSTEM SFI SYSTEM The ECM regulates the voltages at the +, +, - and - terminals of the ECM to a constant level. Therefore, the /F sensor voltage output cannot be confirmed without using an intelligent tester. If a /F sensor malfunction is detected, the ECM sets a DTC. MONITOR DCRIPTION Sensor voltage detection monitor Under the air-fuel ratio feedback control, if the /F sensor voltage output indicates rich or lean for a certain period of time, the ECM determines that there is a malfunction in the /F sensor. The ECM illuminates the MIL and sets a DTC. Example: If the /F sensor voltage output is less than.8 V (very rich condition) for 0 seconds, despite the HO sensor voltage output being less than 0.6 V, the ECM sets DTC P96. lternatively, if the /F sensor voltage output is more than 3.8 V (very lean condition) for 0 seconds, despite the HO sensor voltage output being 0.5 V or more, DTC P95 is set. Sensor current detection monitor rich air-fuel mixture causes a low /F sensor current, and a lean air-fuel mixture causes a high /F sensor current. Therefore, the sensor output becomes low during acceleration, and it becomes high during deceleration with the throttle valve fully closed. The ECM monitors the /F sensor current during fuel-cut and detects any abnormal current values. If the /F sensor output is 3.6 m or more for more than 3 seconds of cumulative time, the ECM interprets this as a malfunction in the /F sensor and sets DTC P95 (high-side stuck). If the /F sensor output is.57 m or less for more than 3 seconds of cumulative time, the ECM sets DTC P96 (low-side stuck). ir Fuel Ratio Sensor Current Monitor Cumulative Time "t" = t + t =3 seconds or more Fuel-Cut ON OFF Delay (3 seconds) Delay (3 seconds) Delay (3 seconds) Sensor Current (m) High Side Threshold Low Side Threshold 3 seconds or more t t Normal Sensor Output bnormal Sensor Output Time 0765E0
GR-FE ENGINE CONTROL SYSTEM SFI SYSTEM 33 MONITOR STRTEGY Related DTCs Required Sensors/Components (Main) Required Sensors/Components (Related) Frequency of Operation Duration MIL Operation Sequence of Operation P95: /F sensor (Bank ) signal stuck lean P96: /F sensor (Bank ) signal stuck rich P97: /F sensor (Bank ) signal stuck lean P98: /F sensor (Bank ) signal stuck rich /F sensor HO sensor Continuous 0 seconds driving cycles None TYPICL ENBLING CONDITIONS LL The monitor will run whenever these DTCs are not present P003, P003, P005, P005 (/F sensor heater - Sensor ) P0037, P0038, P0057, P0058 (O Sensor heater - Sensor ) P000 - P003 (MF meter) P00 - P03 (IT sensor) P05 - P08 (ECT sensor) P00 - P03, P35 (TP sensor) P05 (Insufficient ECT for closed loop) P036, P056 (O Sensor - Sensor ) P07, P07 (Fuel system) P0300 - P0306 (Misfire) P0335 (CKP sensor) P0340, P034 (CMP sensor) P0500 (VSS) Sensor voltage detection monitor (Lean side malfunction P95, P97): Time while all of following conditions met seconds or more Rear HO sensor voltage 0.5 V or more Time after engine start 30 seconds or more /F sensor status ctivated Fuel system status Closed-loop Engine Running Sensor voltage detection monitor (Rich side malfunction P96, P98): Time while all of following conditions met seconds or more Rear HO sensor voltage Below 0.6 V Time after engine start 30 seconds or more /F sensor status ctivated Fuel system status Closed-loop Engine Running Sensor Current detection monitor (P95, P96, P97 P98): Battery voltage V or more tmospheric pressure 570 mmhg or higher ir-fuel ratio sensor status ctivated Pass/Malfunction determination in this driving cycle Not determined Engine coolant temperature 75 C (67 F) or more Continuous time of fuel cut 3 to 0 seconds TYPICL MLFUNCTION THRHOLDS Sensor voltage detection monitor (Lean side malfunction P95, P97): /F sensor voltage More than 3.8 V
34 GR-FE ENGINE CONTROL SYSTEM SFI SYSTEM Sensor voltage detection monitor (Rich side malfunction P96, P98): /F sensor voltage Less than.8 V Sensor current detection monitor (High side malfunction P95, P97): Following condition met for: 3 seconds or more ir-fuel ratio sensor current during fuel cut 3.6 m or more Sensor current detection monitor (Rich side malfunction P96, P98): Following condition met for: 3 seconds or more ir-fuel ratio sensor current during fuel cut Less than.57 m MONITOR RULT Detailed information on Checking Monitor Status (See page -9).
GR-FE ENGINE CONTROL SYSTEM SFI SYSTEM 35 WIRING DIGRM W W-B ECM 3 5 /F Heater Relay Engine Room R/B 4 B Engine Room J/B B W 4 ir-fuel Ratio Sensor (Bank Sensor ) B-R L-W 8 4 L-W Engine Room J/B W +B 4 F- (*) HT F+ R (*) 3 P 5 ir-fuel Ratio Sensor (Bank Sensor ) L E5 E5 H + 30 - E5 EFI NO. Engine Room R/B +B 4 F- (*) HT F+ B-W (*) 3 W R E5 3 E5 H + 3 - E5 B BR *: Shielded B C D 5953E0
36 GR-FE ENGINE CONTROL SYSTEM SFI SYSTEM B C D G-W 3 EFI Relay Engine Room R/B 5 0 I G-W 8 E8 MREL B-R L W-B W-B 30 3 BR /F Heater EFI J J/C C 33 B Engine Room R/B BR Battery EB W-B EE 5954E0 CONFIRMTION DRIVING PTTERN This confirmation driving pattern is used in the "PERFORM CONFIRMTION DRIVING PTTERN" procedure of the following diagnostic troubleshooting procedure.
GR-FE ENGINE CONTROL SYSTEM SFI SYSTEM 37 Monitor Drive Pattern ECT: 75 C (67 F) or more Vehicle Speed Idling ccelerator Pedal Depressed t least 3 times Between 38 and 75 mph (60 and 0 km/h) (g) 40 mph (64 km/h) (i) (j) or more (e) (h) (k) ccelerator Pedal Released (Fuel-cut) 6 mph (0 km/h) Warming up 0 minutes or more 0 seconds or more 4 seconds or more Time Refer to figure below 076E Driving Pattern Detail for (h) through (k) Cumulative Detection Period "t" = t + t + t3 = 3 seconds or more Reference Engine RPM Delay Detection Period t (i) (j),500 rpm (k),000 rpm Idling (h) Idling 4 seconds or more t 4 seconds or more t3 4 seconds or more Time 0763E09 (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) Start the engine, and warm it up until the ECT reaches 75 C (67 F) or higher. (f) Select the following menu items to check the fuel-cut status: DIGNOSIS / ENHNCED OBD II / DT LIST / USER DT / FC IDLE. (g) Drive the vehicle at between 38 mph (60 km/h) and 75 mph (0 km/h) for at least 0 minutes. (h) Change the transmission to nd gear.
38 GR-FE ENGINE CONTROL SYSTEM SFI SYSTEM (i) Drive the vehicle at proper vehicle speed to perform fuel-cut operation (refer to the following HINT). Fuel-cut is performed when the following conditions are met: ccelerator pedal fully released. Engine speed is,500 rpm or more (fuel injection returns at,000 rpm). (j) ccelerate the vehicle to 40 mph (64 km/h) or more by depressing the accelerator pedal for at least 0 seconds. (k) Soon after performing step (j) above, release the accelerator pedal for at least 4 seconds without depressing the brake pedal, in order to execute fuel-cut control. (l) llow the vehicle to decelerate until the vehicle speed declines to less than 6 mph (0 km/h). (m) Repeat steps from (h) through (k) above at least 3 times in one driving cycle. Completion of all /F sensor monitors is required to change the value in TT RULT. CUTION: Strictly observe posted speed limits, traffic laws, and road conditions when performing these drive patterns. 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 (HO) sensor and other potential trouble areas are malfunctioning. The following instructions describe how to conduct the /F CONTROL operation using an intelligent tester. () Connect an intelligent tester to the DLC3. () Start the engine and turn the tester ON. (3) Warm up the engine at an engine speed of,500 rpm for approximately 90 seconds. (4) Select the following menu items: DIGNOSIS / ENHNCED OBD 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 HO sensors (FS BS and OS BS or FS BS and OS BS) displayed on the tester. The /F CONTROL operation lowers the fuel injection volume by.5 % or increases the injection volume by 5 %. Each sensor reacts in accordance with increases and decreases in the fuel injection volume. Standard Tester Display (Sensor) FS BS or FS BS (/F) FS BS or FS BS (/F) OS BS or OS BS (HO) OS BS or OS BS (HO) Injection Volumes Status Voltages +5 % Rich Less than 3.0 -.5 % Lean More than 3.35 +5 % Rich More than 0.55 -.5 % Lean Less than 0.4 NOTICE: The ir-fuel Ratio (/F) sensor has an output delay of a few seconds and the Heated Oxygen (HO) sensor has a maximum output delay of approximately 0 seconds.
GR-FE ENGINE CONTROL SYSTEM SFI SYSTEM 39 Case /F Sensor (Sensor ) Output Voltage HO Sensor (Sensor ) Output Voltage Main Suspected Trouble reas Injection volume +5 % -.5 % Output voltage More than 3.35 V Less than 3.0 V Injection volume +5 % -.5 % Output voltage More than 0.55 V Less than 0.4 V - Injection volume +5 % -.5 % Output voltage lmost no reaction Injection volume +5 % -.5 % /F sensor Output voltage More than 0.55 V Less than 0.4 V /F sensor heater /F sensor circuit 3 Injection volume +5 % -.5 % Output voltage More than 3.35 V Less than 3.0 V Injection volume +5 % -.5 % HO sensor HO sensor heater Output voltage HO sensor circuit lmost no reaction 4 Injection volume +5 % -.5 % Output voltage lmost no reaction Injection volume +5 % -.5 % Output voltage lmost no reaction Injector Fuel pressure Gas leakage from exhaust system (ir-fuel ratio extremely lean or rich) Following the /F CONTROL procedure enables technicians to check and graph the voltage outputs of both the /F and HO sensors. To display the graph, select the following menu items on the tester: DIGNOSIS / ENHNCED OBD II / CTIVE TT / /F CONTROL / USER DT / FS BS and OS BS or FS BS and OS BS, and press the Y button and then the ENTER button followed by the F4 button. 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. 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. CHECK NY OTHER DTCS OUTPUT (IN DDITION TO P95, P96, P97 OR P98) (a) Connect an intelligent tester to the DLC3. (b) Turn the ignition switch ON. (c) Turn the tester ON. (d) Select the following menu items: DIGNOSIS / ENHNCED OBD II / DTC INFO / CURRENT COD. (e) Read DTCs.
30 GR-FE ENGINE CONTROL SYSTEM SFI SYSTEM Result Display (DTC Output) Proceed To P95, P96, P97 or P98 P95, P96, P97 or P98 and other DTCs B If any DTCs other than P95, P96, P97 or P98 are output, troubleshoot those DTCs first. B GO TO DTC CHRT RED VLUE OF INTELLIGENT TTER (TT VLUE OF /F SENSOR) Result (a) (b) (c) (d) (e) (f) Connect an intelligent tester to the DLC3. Turn the ignition switch ON and turn the tester ON. Clear DTCs (See page -38). llow the vehicle to drive in accordance with the drive pattern described in the CONFIRMTION DRIVING PTTERN. Select the following menu items on the tester: DIGNOSIS / ENHNCED OBD II / MONITOR INFO / MONITOR STTUS. Check that the status of OS MON is COMPL. If the status is still INCMPL, drive the vehicle according to the driving pattern again. VIL indicates that the component has not been monitored yet. COMPL indicates that the component is functioning normally. INCMPL indicates that the component is malfunctioning. (g) Select the following menu items: DIGNOSIS / ENHNCED OBD II / MONITOR INFO / TT RULT / RNGE BS, then press the ENTER button. (h) Check the test value of the /F sensor output current during fuel-cut. Test Value Within normal range (.57 m or more, and less than 3.6 m) Outside normal range (Less than.57 m, or 3.6 m or more) Proceed To B B Go to step 0 3 RED VLUE OF INTELLIGENT TTER (OUTPUT VOLTGE OF /F SENSOR) (a) (b) (c) Connect an intelligent tester to the DLC3. Start the engine. Turn the tester ON.
GR-FE ENGINE CONTROL SYSTEM SFI SYSTEM 3 Standard (d) Warm up the ir-fuel Ratio (/F) sensor at an engine speed of,500 rpm for 90 seconds. (e) Select the following menu items: DIGNOSIS / ENHNCED OBD II / SNPSHOT / MNUL SNPSHOT / USER DT / FS BS or FS BS and ENGINE SPD. (f) Check the /F sensor voltage three times, when the engine is in each of the following conditions: () While idling (check for at least 30 seconds) () t an engine speed of approximately,500 rpm (without any sudden changes in engine speed) (3) Raise the engine speed to 4,000 rpm and then quickly release the accelerator pedal so that the throttle valve is fully closed. Conditions /F Sensor Voltage Variations Reference () and () Changes at approximately 3.3 V Between 3. V and 3.5 V (3) Increases to 3.8 V or more This occurs during engine deceleration (when fuel-cut performed) For more information, see the diagrams below. Normal Condition: Malfunction Condition: (3) pproximately 4,000 rpm (3) pproximately 4,000 rpm () pproximately,500 rpm () pproximately,500 rpm () Idling () Idling () Idling () Idling Engine RPM Engine RPM /F Sensor Voltage /F Sensor Voltage Fuel-cut Fuel-cut "Condition (), ()" Change at approximately 3.3 V "Condition (3)" 3.8 V or more When /F sensor circuit malfunctioning, voltage output does not change 076E0 If the output voltage of the /F sensor remains at approximately 3.3 V (see Malfunction Condition diagram) under any conditions, including those above, the /F sensor may have an open circuit. (This will also happen if the /F sensor heater has an open circuit.) If the output voltage of the /F sensor remains at either approximately 3.8 V or more, or.8 V or less (see Malfunction Condition diagram) under any conditions, including those above, the /F sensor may have a short circuit.
3 GR-FE ENGINE CONTROL SYSTEM SFI SYSTEM The ECM stops fuel injection (fuel cut) during engine deceleration. This causes a lean condition and results in a momentary increase in the /F sensor output voltage. The ECM must establish a closed throttle valve position learning value to perform fuel cut. If the battery terminal has been reconnected, the vehicle must be driven over 0 mph (6 km/h) to allow the ECM to learn the closed throttle valve position. When the vehicle is driven: The output voltage of the /F sensor may be below.8 V during fuel enrichment. For the vehicle, this translates to a sudden increase in speed with the accelerator pedal fully depressed when trying to overtake another vehicle. The / F sensor is functioning normally. The /F sensor is a current output element; therefore, the current is converted into a voltage inside the ECM. Measuring the voltage at the connectors of the /F sensor or ECM will show a constant voltage result. NG Go to step 0 OK 4 PERFORM CONFIRMTION DRIVING PTTERN NEXT 5 CHECK WHETHER DTC OUTPUT RECURS (DTC P95, P96, P97 OR P98) Result (a) Connect an intelligent tester to the DLC3. (b) Turn the ignition switch ON and the tester ON. (c) Select the following menu items: DIGNOSIS / ENHNCED OBD II / DTC INFO / PENDING COD. (d) Read DTCs. Display (DTC Output) Proceed To P95, P96, P97 or P98 No output B B Go to step 9 6 REPLCE IR FUEL RTIO SENSOR NEXT
GR-FE ENGINE CONTROL SYSTEM SFI SYSTEM 33 7 PERFORM CONFIRMTION DRIVING PTTERN NEXT 8 CHECK WHETHER DTC OUTPUT RECURS (DTC P95, P96, P97 OR P98) Result (a) Connect an intelligent tester to the DLC3. (b) Turn the ignition switch ON and the tester ON. (c) Select the following menu items: DIGNOSIS / ENHNCED OBD II / DTC INFO / PENDING COD. (d) Read DTCs. Display (DTC Output) Proceed To No output P95, P96, P97 or P98 B B REPLCE ECM ND PERFORM CONFIRMTION DRIVING PTTERN 9 CONFIRM WHETHER VEHICLE HS RUN OUT OF FUEL IN PST NO CHECK FOR INTERMITTENT PROBLEMS Y DTC CUSED BY RUNNING OUT OF FUEL 0 INSPECT IR FUEL RTIO SENSOR (HETER RISTNCE) Component Side: /F Sensor +B 4 Bank HT (a) (b) Disconnect the 4 or 5 /F sensor connector. Measure the resistance between the terminals of the /F sensor connector. Standard Resistance Tester Connections Specified Conditions 5 Bank F- Front View F+ 0855E6 (c) NG HT () - +B () HT () - F- (4) Reconnect the /F sensor connector..8 to 3.4 Ω at 0 C (68 F) 0 kω or higher REPLCE IR FUEL RTIO SENSOR OK
34 GR-FE ENGINE CONTROL SYSTEM SFI SYSTEM INSPECT IR FUEL RTIO SENSOR HETER RELY (a) (b) Remove the /F sensor heater relay from the engine room R/B. Check the /F sensor heater relay resistance. Standard Resistance B0600E0 Tester Connections Specified Conditions 3-5 0 kω or higher (c) NG 3-5 Below Ω (when battery voltage applied to terminals and ) Reinstall the /F sensor heater relay. REPLCE IR FUEL RTIO SENSOR HETER RELY OK CHECK HRNS ND CONNECTOR (/F SENSOR - ECM) Wire Harness Side: HT 4 Bank 5 Bank F+ /F Sensor Connector ECM Connector +B 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 +B terminal of the /F sensor connector and body ground. Standard Voltage Tester Connections +B (4-) - Body ground +B (5-) - Body ground Specified Conditions 9 to 4 V Turn the ignition switch OFF. Disconnect the E5 ECM connector. Check the resistance. Standard Resistance (Check for open) E5 Tester Connections HT (4-) - H (E5-) Specified Conditions F+ (4-3) - + (E5-) + - H H + - 653E05 F- (4-4) - - (E5-30) HT (5-) - H (E5-) F+ (5-3) - + (E5-3) F- (5-4) - - (E5-3) Below Ω Standard Resistance (Check for short) Tester Connections HT (4-) or H (E5-) - Body ground F+ (4-3) or + (E5-) - Body ground F- (4-4) or - (E5-30) - Body ground HT (5-) or H (E5-) - Body ground F+ (5-3) or + (E5-3) - Body ground F- (5-4) or - (E5-3) - Body ground Specified Conditions 0 kω or higher (g) (h) Reconnect the ECM connector. Reconnect the /F sensor connector.
GR-FE ENGINE CONTROL SYSTEM SFI SYSTEM 35 Reference (Bank Sensor System Diagram) /F Sensor Heater Relay /F Sensor ECM From Battery From EFI Relay /F Heater Fuse EFI No. Fuse Heater Sensor H + - Duty Control 5897E0 NG REPIR OR REPLCE HRNS OR CONNECTOR OK 3 CHECK IR INDUCTION SYSTEM (a) Check the air induction system for vacuum leakage. OK: No leakage from air induction system. NG REPIR OR REPLCE IR INDUCTION SYSTEM OK 4 CHECK FUEL PRSURE (a) Check the fuel pressure. NG REPIR OR REPLCE FUEL SYSTEM OK 5 INSPECT FUEL INJECTOR SSEMBLY (a) Check the injector injection (whether fuel volume is high or low, and whether injection pattern is poor). NG REPLCE FUEL INJECTOR SSEMBLY
36 GR-FE ENGINE CONTROL SYSTEM SFI SYSTEM OK 6 REPLCE IR FUEL RTIO SENSOR NEXT 7 PERFORM CONFIRMTION DRIVING PTTERN NEXT 8 CHECK WHETHER DTC OUTPUT RECURS (DTC P95, P96, P97 OR P98) Result (a) Connect an intelligent tester to the DLC3. (b) Turn the ignition switch ON and the tester ON. (c) Select the following menu items: DIGNOSIS / ENHNCED OBD II / DTC INFO / PENDING COD. (d) Read DTCs. Display (DTC Output) Proceed To No output P95, P96, P97 or P98 B B REPIR OR REPLCE ECM ND PERFORM CONFIRMTION DRIVING PTTERN 9 CONFIRM WHETHER VEHICLE HS RUN OUT OF FUEL IN PST NO CHECK FOR INTERMITTENT PROBLEMS Y DTC CUSED BY RUNNING OUT OF FUEL 0 REPLCE IR FUEL RTIO SENSOR NEXT PERFORM CONFIRMTION DRIVING PTTERN NEXT
GR-FE ENGINE CONTROL SYSTEM SFI SYSTEM 37 CHECK WHETHER DTC OUTPUT RECURS (DTC P95, P96, P97 OR P98) 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 OBD II / DTC INFO / PENDING COD. (d) Read DTCs. Display (DTC Output) Proceed To No output P95, P96, P97 or P98 (/F sensor pending DTCs) B B REPLCE ECM END