DTC P1273, P1283 A/F SENSOR 1 MONITOR ITEM CONDITION SPECIFICATION

Transcription

1 T P1273, P1283 / SNSOR 1 omponent escription The air fuel ratio (/) sensor 1 is a planar dual-cell limit current sensor. The sensor element of the / sensor 1 is the combination of a Nernst concentration cell (sensor cell) with an oxygen-pump cell, which transports ions. t has a heater in the element. The sensor is capable of precise measurement = 1, but also in the lean and rich range. Together with its control electronics, the sensor outputs a clear, continuous signal throughout a wide range (0.7 < < air). The exhaust gas components diffuse through the diffusion gap at the electrode of the oxygen pump and Nernst concentration cell, where they are brought to thermodynamic balance. n electronic circuit controls the pump current through the oxygenpump cell so that the composition of the exhaust gas in the diffusion gap remains constant at = 1. Therefore, the / sensor 1 is able to indicate air/fuel ratio by this pumping of current. n addition, a heater is integrated in the sensor to ensure the required operating temperature of (1,292-1,472 ). PP:22693 UBS00Q1 S579Z ONSUT- Reference Value in ata onitor ode Specification data are reference values. / SN1 (B1) / SN1 (B2) ONTOR T ONTON SPTON On Board iagnosis ogic ngine: fter warming up UBS00Q2 UBS00Q3 To judge the malfunction, the / signal computed by from the / sensor 1 signal is monitored not to be shifted N side or R side. T onfirmation Procedure aintaining engine speed at 2,000 rpm luctuates around 1.5V T No. Trouble diagnosis name T detecting condition Possible ause P (Bank 1) ir fuel ratio (/) sensor 1 P1283 lean shift monitoring 1283 (Bank 2) The output voltage computed by from the / sensor 1 signal is shifted to the lean side for a specified period. UBS00Q4 NOT: f T onfirmation Procedure has been previously conducted, always turn ignition switch O and wait at least 10 seconds before conducting the next test. TSTN ONTON: Before performing the following procedure, confirm that battery voltage is more than 11V at idle. WT ONSUT- 1. Start engine and warm it up to normal operating temperature. 2. Turn ignition switch O and wait at least 10 seconds. 3. Turn ignition switch ON and select S-RNN ONT in WOR SUPPORT mode with ON- SUT-. S580Z ir fuel ratio (/) sensor 1 ir fuel ratio (/) sensor 1 heater uel pressure njectors ntake air leaks -443

2 4. lear the self-learning coefficient by touching R. 5. Turn ignition switch O and wait at least 10 seconds. 6. Start engine and keep the engine speed between 3,500 and 4,000 rpm for 1 minute under no load. 7. et engine idle for 1 minute. 8. eep engine speed between 2,500 and 3,000 rpm for 13 minutes. 9. f 1st trip T is detected, go to -448, "iagnostic Procedure". WT ST 1. Start engine and warm it up to normal operating temperature. 2. Turn ignition switch O and wait at least 10 seconds. 3. isconnect mass air flow sensor harness connector. 4. Start engine and let it idle for at least 5 seconds. 5. Stop engine and reconnect mass air flow sensor harness connector. 6. Select O 3 with ST and make sure that T P0102 is detected. 7. Select O 4 with ST and erase the T P Start engine and keep the engine speed between 3,500 and 4,000 rpm for 1 minute under no load. 9. et engine idle for 1 minute. 10. eep engine speed between 2,500 and 3,000 rpm for 13 minutes. 11. Select O 7 with ST. f 1st trip T is detected, go to -448, "iagnostic Procedure". S968Y BB

3 Wiring iagram BN 1 UBS00Q5 BBW

4 Specification data are reference values and are measured between each terminal and ground. UTON: o not use ground terminals when measuring input/output voltage. oing so may result in damage to the 's transistor. Use a ground other than terminals, such as the ground. TR- N NO. WR OOR T ONTON T ( Voltage) 16 BR/R pproximately 3.1V [ngine is running] 35 BR/ pproximately 2.6V / sensor 1 (Bank 1) Warm-up condition 56 /B pproximately 2.3V dle speed 75 P/B pproximately 2.3V -446

5 BN 2 BBW

6 Specification data are reference values and are measured between each terminal and ground. UTON: o not use ground terminals when measuring input/output voltage. oing so may result in damage to the 's transistor. Use a ground other than terminals, such as the ground. TR- N NO. WR OOR iagnostic Procedure 1. ROUN ONNTONS T ONTON T ( Voltage) 57 /P pproximately 2.6V [ngine is running] 58 R/ pproximately 2.3V / sensor 1 (Bank 2) Warm-up condition 76 / pproximately 3.1V dle speed 77 BR/B pproximately 2.3V 1. Turn ignition switch O. 2. oosen and retighten three ground screws on the body. UBS00Q6 Refer to -131, "round nspection". O or N O >> O TO 2. N >> Repair or replace ground connections. 2. RTTN / SNSOR 1 BB0354 oosen and retighten the / sensor 1. BB0375 Tightening torque: 50 N-m (5.1 kg-m, 37 ft-lb) >> O TO

7 3. R T S-RNN T With ONSUT- 1. Start engine and warm it up to normal operating temperature. 2. Select S-RNN ONT in WOR SUPPORT mode with ONSUT-. 3. lear the self-learning control coefficient by touching R. 4. Run engine for at least 10 minutes at idle speed. s the 1st trip T P0171 or P0174 detected? s it difficult to start engine? Without ONSUT- 1. Start engine and warm it up to normal operating temperature. 2. Turn ignition switch O. 3. isconnect mass air flow sensor harness connector. 4. Restart engine and let it idle for at least 5 seconds. 5. Stop engine and reconnect mass air flow sensor harness connector. 6. ake sure T P0102 is displayed. 7. rase the T memory. Refer to -61, "OW TO RS SSON-RT NOST NORTON". 8. ake sure T P0000 is displayed. 9. Run engine for at least 10 minutes at idle speed. s the 1st trip T P0171 or P0174 detected? s it difficult to start engine? Yes or No Yes >> Perform trouble diagnosis for T P0171 or P0174. Refer to No >> O TO 4. S968Y BB

8 4. / SNSOR 1 POWR SUPPY RUT 1. Turn ignition switch O. 2. isconnect / sensor 1 harness connector. 3. Turn ignition switch ON. 4. heck voltage between / sensor 1 terminal 3 and ground with ONSUT- or tester. Voltage: Battery voltage O or N O >> O TO 6. N >> O TO 5. BB0376 PBB TT UNTONN PRT heck the following. arness connectors 5, 14 P /R harness connector fuse arness for open or short between / sensor 1 and fuse >> Repair or replace harness or connectors. -450

9 6. / SNSOR 1 NPUT SN RUT OR OPN N SORT 1. Turn ignition switch O. 2. isconnect harness connector. 3. heck harness continuity between / sensor 1 terminal and terminal as follows. Refer to Wiring iagram. Bank1 Bank 2 / sensor 1 terminal terminal ontinuity should exist. 4. heck harness continuity between the following terminals and ground. Refer to Wiring iagram. Bank 1 Bank 2 / sensor 1 terminal terminal / sensor 1 terminal terminal ontinuity should not exist. 5. lso check harness for short to power. O or N O >> O TO 7. N >> Repair open circuit or short to ground or short to power in harness or connectors. 7. / SNSOR 1 TR Refer to -358, "omponent nspection". O or N O >> O TO 8. N >> Replace / sensor NTRTTNT NNT Perform -125, "TROUB NOSS OR NTRTTNT NNT". O or N O >> Replace / sensor 1. N >> Repair or replace. Removal and nstallation R U RTO (/) SNSOR 1 Refer to -19, "XUST NO N TR WY TYST". UBS00Q7-451