Sfi System - Diagnosis: Other Lexus LS III рестайлинг

PART AND SYSTEM NAME LIST

This reference list indicates the part names used in this manual along with their definitions.

Scheme 507

Scheme 508

Scheme 509

Scheme 510

Scheme 511

Scheme 512

Scheme 513

Scheme 514

Scheme 515

Scheme 516

1. VEHICLE BROUGHT TO WORKSHOP
2. CUSTOMER PROBLEM ANALYSIS (See «CUSTOMER PROBLEM ANALYSIS CHECK»(ref-209347-S37637773292005120900000) )
3. CONNECT OBD HAND-HELD TESTER TO DLC3 HINT: If the display indicates a communication fault in the tool, inspect the DLC3.
4. CHECK DTC AND FREEZE FRAME DATA (See «DTC CHECK/CLEAR»(ref-209347-S24476769982005120900000) ) HINT: Record or print DTC and freeze frame data, if needed.
5. CLEAR DTC AND FREEZE FRAME DATA (See «DTC CHECK/CLEAR»(ref-209347-S24476769982005120900000) )
6. VISUAL INSPECTION
7. SETTING CHECK (TEST) MODE DIAGNOSIS (See «CHECK MODE PROCEDURE»(ref-209347-S35445511632005120900000) )
8. PROBLEM SYMPTOM CONFIRMATION HINT: If the engine does not start, perform steps 10 and 12 first. B: Go to step 10 . A: Go to next step.
9. SYMPTOM SIMULATION
10. DTC CHECK (See «DTC CHECK/CLEAR»(ref-209347-S24476769982005120900000) ) B: Go to step 12 . A: Go to next step.
11. DTC CHART (See «DIAGNOSTIC TROUBLE CODE CHART»(ref-209347-S25990035302005120900000) ) Go to step 14
12. BASIC INSPECTION (See «BASIC INSPECTION»(ref-209347-S16357267142005120900000) ) B: Go to step 17 A: Go to next step.
13. PROBLEM SYMPTOMS TABLE (See «PROBLEM SYMPTOMS TABLE»(ref-209347-S16229319672005120900000) ) B: Go to step 17 A: Go to next step.
14. CHECK ECM POWER SOURCE CIRCUIT (See «ECM POWER SOURCE CIRCUIT»(ref-209347-S32118634772005120900000) )
15. CIRCUIT INSPECTION B: Go to step 18 A: Go to next step.
16. CHECK FOR INTERMITTENT PROBLEMS (See «CHECK FOR INTERMITTENT PROBLEMS»(ref-209347-S03364058202005120900000) ) Go to step 18
17. PARTS INSPECTION
18. IDENTIFICATION OF PROBLEM
19. ADJUSTMENT, REPAIR
20. CONFIRMATION TEST END

Scheme 517

CHECK FOR INTERMITTENT PROBLEMS

HINT

Detect the vehicle's ECM using check mode. Intermittent problems are easier to detect when the hand-held tester is in check mode. In check mode, the hand-held tester uses 1 trip detection logic, which has a higher sensitivity to malfunctions than normal mode (default), which uses 2 trip detection logic.

1. Clear the DTCs (see «DTC CHECK/CLEAR»(ref-209347-S24476769982005120900000) ).
2. Set the check mode (see «CHECK MODE PROCEDURE»(ref-209347-S35445511632005120900000) ).
3. Perform a simulation test.
4. Check the connector and terminal (see «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-218525-S07507750332006020700000) ).
5. Wiggle the harness and the connector (see «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-218525-S07507750332006020700000) ).

LIST OF DISABLE A MONITOR

HINT

The table indicates ECM monitoring status for the items in the upper columns if the DTCs in each line the left are being set. The "X" mark is used when the DTC on the left is stored but detection of the DTC in the upper column is not performed.

Scheme 518

Scheme 519

Scheme 520

Scheme 521

Scheme 522

Scheme 523

CHECKING MONITOR STATUS

HINT

The hand-held tester's MONITOR RESULT first monitors each component and system, and then display whether each is normal or malfunctioning.

Scheme 524

Scheme 525

Scheme 526

1. HOW TO READ MONITOR RESULT Connect the hand-held tester together with Controller Area Network Vehicle Interface Module (CAN VIM) to the DLC3. Enter the following menus: DIAGNOSIS/ENHANCED OBD II/ MONITOR INFO/MONITOR RESULT. The Test ID will appear at the beginning of each line, followed by INCMP, PASS, or FAIL. HINT: INCMP: Stands for "incomplete". The monitor has not been done yet. PASS: The component or system is operating normally. FAIL: A malfunction has been detected. Select a Test ID from the list and press "ENTER". The following screen will appear: VAL (TEST VALUE) [Test Data] [Unit] LMT (TEST LIMIT) [Test Limit] [Unit] TLT [Test Limit Type] Press "HELP" for more information. HINT: The results of the monitor test can be viewed by selecting MONITOR RESULT from the menu. The results of the monitor test indicate the latest malfunction judgment of the diagnosis. The TEST VALUE is the parameter value detected during the diagnosis. (Example: P0128 Thermostat Malfunction = Engine coolant temperature at the time of malfunction judgement is made). The TEST LIMIT indicates the malfunction threshold value. (Example: P0128 Thermostat Malfunction = 75°C or more). When the monitor runs, the TEST VALUE is recorded and compared to the TEST LIMIT to determine if the result PASS or FAIL. By comparing the TEST VALUE and TEST LIMIT, the degree of failure can be determined. In rare cases, the monitor result is PASS but a DTC is set and the MIL is illuminated. The monitor may have detected the malfunction on a previous trip and the passed on the most recent trip. An intermittent problem may be causing the DTC.

PURPOSE OF READINESS TESTS

1. The On-Board Diagnostic (OBD II) system is designed to monitor the performance of emission lated components, and report any detected abnormalities with Diagnostic Trouble Codes (DTCs). Since various components need to be monitored during different driving conditions, the OBD II system is designed to run separate monitoring programs called readiness monitors.
2. The hand-held tester's software must be version 9.0 or newer to view the readiness monitor status. From the "Enhanced OBD II Menu", select "Monitor Status" to view the readiness monitor status.
3. A generic OBD II scan tool can also be used to view the readiness monitor status.
4. When the readiness monitor status reads "complete", the necessary conditions have been met for running performance tests for that readiness monitor.

HINT

Many state Inspection and Maintenance (I/M) programs require a vehicle's readiness monitor status to show "complete" before beginning emissions tests.

1. The readiness monitor will be reset to "incomplete" if: The ECM has lost battery power or blown a fuse. DTCs have been cleared. The conditions for running the readiness monitor have not been met.
2. If the readiness monitor status shows "incomplete", follow the appropriate readiness monitor drive pattern to change the status to "complete".

Note. The following drive patterns are the fastest method of completing all the requirements necessary for making the readiness monitor status read "complete".

If forced to momentarily stop a drive pattern due to traffic or other factors, the drive pattern can be resumed. Upon completion of the drive pattern, in most cases, the readiness monitor status will change to "complete".

Sudden changes in vehicle load and speed, such as driving up and down hills and/or sudden acceleration, hinder readiness monitor completion.

Contents

Scheme 527

Scheme 528

Scheme 529

Scheme 530

Scheme 531

1. CATALYST MONITOR Preconditions The monitor will not run unless: The Malfunction Indicator Lamp (MIL) is OFF. Engine Coolant Temperature (ECT) is 75°C (167°F) or greater. Intake Air Temperature (IAT) is - 10°C (14°F) or greater. NOTE: The readiness test can be completed in cold ambient conditions (less than -10°C (14°F). Finish the drive pattern, turn the ignition switch OFF and then ON again, and repeat the drive pattern a second time. Drive Pattern Connect the OBD II scan tool to DLC3 to check readiness monitor status and preconditions (refer to step (a)). Drive vehicle at 64 to 88 km/h (40 to 55 mph) for approximately 3 minutes. NOTE: Drive with smooth throttle operation and avoid sudden acceleration. If IAT was less than 10°C (50°F) when the engine was started, drive the vehicle at 64 to 88 km/h (40 to 55 mph) for an additional 3 minutes. Drive the vehicle at 56 to 72 km/h (35 to 45 mph) for approximately 7 minutes. NOTE: Drive with smooth throttle operation and avoid sudden closure of the throttle. Check the status of the readiness monitor on the scan tool display. If readiness monitor status did not switch to "complete", ensure preconditions are met, turn the ignition switch OFF, and then repeat steps (2) and (3).
2. EVAP SYSTEM MONITOR NOTE: A cold soak must be performed prior to conducting the drive pattern to complete the internal pure sure readiness monitor. Cold Soak Preconditions The monitor will not run unless: The MIL is OFF. Fuel level is approximately 1/2 to 3/4 full. Altitude is 2,400 m (8,000 feet) or less. Cold Soak Procedure Let vehicle cold soak for 8 hours or until the difference between IAT and ECT is less than 7°C (13°F). Preconditions The monitor will not run unless: The MIL is OFF. Fuel level is approximately 1/2 to 3/4 full. The altitude is 2,400 m (8,000 feet) or less. ECT is between 4.4°C and 35°C (40°F and 95°F). IAT is between 4.4°C and 35°C (40°F and 95°F). The cold soak procedure has been completed. Before starting the engine, "IAT - ECT" must be - 7°C (19°F) to 11°C (52°F). HINT: Example 1 ECT = 24°C (75°F) IAT = 16°C (60°F) Difference between ECT and IAT is 8°C (15°F). --> The monitor will not run because "IAT - ECT" is less than -7°C (19°F). Example 2 ECT = 21°C (70°F) IAT = 20°C (68°F) Difference between ECT and IAT is 1°C (2°F). --> The monitor will run because "IAT - ECT" is between -7°C (19°F) to 11°C (52°F). NOTE: The readiness test can be completed in cold ambient conditions (less than 4.4°C (40°F)) and/or high altitudes (more than 2,400 m (8,000 feet)). Finish the drive pattern, turn the ignition switch OFF and then ON again, and repeat the drive pattern a second time. Drive Pattern Connect the OBD II scan tool to DLC3 to check monitor status and preconditions (refer to step (a)). Release pressure in fuel tank by removing the fuel tank cap and then reinstalling it. Start the engine and allow it to idle until ECT is 75°C (167°F) or more. Run the engine at 3,000 RPM for about 10 seconds. With the engine idling, turn the A/C ON to create a slight electrical load. Wait 15 to 50 minutes. NOTE: If the vehicle does not have A/C, put a slight electrical load on the engine by following the steps below: Set the parking brake securely. Use wheel chocks to secure the tires. Move the shift lever to the D position and allow engine to idle for 15 to 50 minutes. Check the readiness monitor status.
3. HEATED OXYGEN SENSOR (HO2S) MONITOR Preconditions The monitor will not run unless: The MIL is OFF. Drive Pattern Connect the OBD II scan tool to the DLC3 to check monitor status and preconditions. Start the engine and allow it to idle for 2 minutes or more. Drive the vehicle at 40km/h (25mph) or more at least 50 seconds. Stop the vehicle and allow the engine to idle for 40 seconds or more. Perform steps (3) and (4) ten times. If readiness status does not switch to "complete", ensure preconditions are met, turn ignition OFF and then repeat steps (1) through (5).
4. HO2S (HEATED OXYGEN SENSOR) HEATER MONITOR Preconditions The monitor will not run unless: The MIL is OFF. Drive Pattern Connect the OBD II scan tool to DLC3 to check monitor status and preconditions (refer to step (a)). Start the engine and allow it to idle for 10 minutes or more. Drive the vehicle at 40 km/h (25 mph) or more for at least 2 minutes. Check the readiness monitor status. If the readiness monitor status did not change to "complete", double-check the preconditions, turn the ignition switch OFF, and repeat steps (2) to (3).

Scheme 532

Scheme 533

HINT

Each ECM terminal's standard voltage is (Scheme 534)below.

In the table, first follow the information under "Condition". Look under "Symbols (Terminal No.)" for the terminals to be inspected. The standard voltage between the terminals is shown under "Specified Condition".

Use the illustration above as a reference for the ECM terminals.

Scheme 534

Scheme 535

Scheme 536

WAVEFORM 1

Throttle actuator positive terminal

Scheme 537

HINT

The duty ratio varies depending on the throttle opening operation.

Scheme 538

WAVEFORM 2

Throttle actuator negative terminal

Scheme 539

HINT

The duty ratio varies depending on the throttle opening operation.

Scheme 540

Scheme 541

Scheme 542

1. CMP sensor
2. CKP sensor HINT: The wavelength becomes shorter as engine RPM increases.

WAVEFORM 4

1. VVT sensor bank 1
2. VVT sensor bank 2
3. CKP sensor

Scheme 543

HINT

The wavelength becomes shorter as engine RPM increases.

Scheme 544

WAVEFORM 5

Vehicle speed signal

Scheme 545

HINT

The wavelength becomes shorter as vehicle speed increases.

Scheme 546

Scheme 547

1. Igniter IGT signal (from ECM to igniter)
2. Igniter signal IGF (from igniter to ECM)

HINT

The wavelength becomes shorter as engine RPM increases.

Scheme 548

WAVEFORM 7

Fuel injector

Scheme 549

HINT

The wavelength becomes shorter as engine RPM increases.

Scheme 550

WAVEFORM 8

EVAP VSV

Scheme 551

HINT

In cases where the EVAP VSV can be used to purge EVAP, the waveform will not be displayed as shown on the left. In the DATA LIST, the item EVAP PURGE VSV shows the duty ratio of voltage flowing to the purge valve.

Duty ratio for EVAP VSV (%) = A/B x 100

Scheme 552

WAVEFORM 9

VVT OCV

Scheme 553

HINT

In the DATA LIST, the items VVT OCV DUTY B1 and B2 show the duty ratio of voltage flowing to the OCV (see illustration on left).

VVT OCV DUTY B1, B2 = A/B x 100 (%)

Scheme 554

WAVEFORM 10

Front HO2S

Scheme 555

HINT

In the DATA LIST, the items HO2S B1 S1 and HO2S B2 S1 show the ECM input values of the front HO2S.

Scheme 556

WAVEFORM 11

Rear HO2S

Scheme 557

HINT

In the DATA LIST, the items HO2S B1 S2 and HO2S B2 S2 show the ECM input values of the rear HO2S.

Scheme 558

WAVEFORM 12

Knock sensor

Scheme 559

HINT

Scheme 560

1. The wavelength becomes shorter as engine RPM increases.
2. The waveforms and amplitudes displayed differ slightly depending on the vehicle.

WAVEFORM 13

Cooling fan

Scheme 561

HINT

The duty ratio (labeled A and B in the illustration) changes depending on the engine coolant temperature.

Scheme 562

NORMAL MODE AND CHECK MODE

The diagnosis system operates in "normal mode" during normal vehicle use. In normal mode, "2-trip detection logic" is used to ensure accurate detection of malfunctions. "Check mode" is also available to technicians as an option. In check mode, "1-trip detection logic" is used for simulating malfunction symptoms and increasing the system's ability to detect malfunctions, including intermittent malfunctions.

2-TRIP DETECTION LOGIC

When a malfunction is first detected, the malfunction is temporarily stored in the ECM memory (1st trip). If the ignition switch is turned OFF and then ON again, and the same malfunction is detected again, the MIL will illuminate.

Scheme 563

FREEZE FRAME DATA

Freeze frame data records the engine conditions (fuel system, calculated load, engine coolant temperature, fuel trim, engine speed, vehicle speed, etc.) when a malfunction is detection 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.

The hand-held tester records freeze frame data in five different instances: 1) 3 times before the DTC is set, 2) once when the DTC is set, and 3) once after the DTC is set. These data can be used to simulate the vehicle's condition around the time when the malfunction occurred. The data may help find the cause of the malfunction, or judge if the DTC is being caused by a temporary malfunction or not.

Scheme 564

DLC3 (Data Link Connector 3)

The vehicle's ECM uses the ISO 15765-4 for communication protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 15765-4 format.

HINT

Connect the cable of the hand-held tester (with CAN VIM) to the DLC3, turn the ignition switch ON and attempt to use the hand-held tester. If the screen displays UNABLE TO CONNECT TO VEHICLE, a problem exists in the vehicle side or the tester side.

If the communication is normal when the tool is connected to another vehicle, inspect the DLC3 on the original vehicle.

If the communication is still impossible when the tool is connected to another vehicle, the problem is probably in the tool itself. Consult the Service Department listed in the tool's instruction manual.

Scheme 565

Scheme 566

CHECK BATTERY VOLTAGE

Battery voltage: 11 to 14 V

If voltage is below 11 V, replace the battery before proceeding.

CHECK MIL

1. Check that the MIL illuminates when turning the ignition switch ON. If the MIL does not illuminate, there is a problem in the MIL circuit (refer to «MIL CIRCUIT»(ref-209347-S32339545672005120900000) )
2. When the engine is started, the MIL should turn off.

ALL READINESS

For this vehicle, using the hand-held tester allows readiness codes corresponding to all DTCs to be read. When diagnosis (normal or malfunctioning) has been complete, readiness codes are set. Enter the following menus: ENHANCED OBD II/MONITOR STATUS on the hand-held tester.

Scheme 567

1. CHECK DTC DTCs which are stored in the ECM can be displayed with the hand-held tester or generic OBD II scan tool. These scan tools can display pending DTCs and current DTCs. Some DTC aren't stored if the ECM doesn't detect a malfunction during consecutive driving. However, the detected malfunction during once driving is stored as pending DTC. Connect the hand-held tester to the Controller Area Network Vehicle Interface Module (CAN VIM). Then connect the CAN VIM to the Data Link Connector 3 (DLC3). Turn the ignition switch ON. Enter the following menus: DIAGNOSIS/ ENHANCED OBD II/ DTC INFO/ CURRENT CODES (or PENDING CODE). Confirm the DTCs and freeze frame data and then write them down. See «DIAGNOSTIC TROUBLE CODE CHART»(ref-209347-S25990035302005120900000) to confirm the details of the DTCs. NOTE: When simulating a symptom with the scan tool to check for DTCs, use normal mode. For codes on DIAGNOSIS TROUBLE CODE CHART subject to "2-trip detection logic", perform the following actions. Turn the ignition switch OFF after the symptom is simulated once. Then repeat the simulation process again. When the problem has been simulated twice, the MIL illuminates and the DTCs are recorded in the ECM.
2. CLEAR DTC Connect the hand-held tester to the CAN VIM. Then connect the CAN VIM to the DLC3. Turn the ignition switch ON. Enter the following menus: DIAGNOSIS/ ENHANCED OBD II/ DTC INFO/ CLEAR CODES and press YES.

FAIL-SAFE CHART

If any of the following codes are recorded, the ECM enters fail-safe mode.

Scheme 568

Note. * The vehicle can be driven slowly when the accelerator pedal is depressed firmly and slowly. If the accelerator pedal is depressed quickly, the vehicle may speed up and slow down erratically.

Scheme 569

Scheme 570

Scheme 571

Scheme 572

Scheme 573

Scheme 574

Scheme 575

Scheme 576

Scheme 577

1. DATA LIST HINT: Using the hand-held tester DATA LIST allows switch, sensor, actuator and other item values to be read without removing any parts. Reading the DATA LIST early in troubleshooting is one way to shorten labor time. NOTE: In (Scheme 570) below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not. Warm up the engine. Turn the ignition switch OFF. Connect the hand-held tester to the Controller Area Network Vehicle Interface Module (CAN VIM). Then connect the CAN VIM to the Data Link Connector 3 (DLC3). Turn the ignition switch ON. Turn ON the hand-held tester. Enter the following menus: DIAGNOSIS/ ENHANCED OBD II/ DATA LIST. According to the display on tester, read the DATA LIST. If no conditions are specifically stated for "idling", the shift lever is in the N or P position, and the A/C and all accessory switches are OFF. * Misfire margin indicates the possibility that misfires do not occur. The misfires are counted when the misfire margin is 0 % or less. There is little possibility of misfires if the misfire margin is less than 30 %. Misfire margin is calculated with the following arithmetic expression. Misfire margin (%) = Fluctuation of engine revolution to interpret as misfire - Fluctuation of actual engine revolution / Fluctuation of engine revolution to interpret as misfire x 100 Displays during Active Test
2. ACTIVE TEST HINT: Performing the hand-held tester ACTIVE TEST allows relay, Vacuum Switching Valve (VSV), actuator and other items to be operated without removing any parts. Performing the ACTIVE TEST early in troubleshooting is one way to shorten labor time. The DATA LIST can be displayed during the ACTIVE TEST. Turn the ignition switch OFF. Connect the hand-held tester to the CAN VIM. Then connect the CAN VIM to the DLC3. Turn the ignition switch ON. Turn ON the hand-held tester. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST. According to the display on tester, perform the ACTIVE TEST.

TYPICAL MALFUNCTION THRESHOLDS

P0031, P0037, P0051 and P0057

Scheme 578

P0032, P0038, P0052 and P0058

Scheme 579

Scheme 580

Scheme 581

P0100

Scheme 582

P0102

Scheme 583

P0103

Scheme 584

Scheme 585

Scheme 586

Case 1

Scheme 587

Case 2

Scheme 588

Case 3

Scheme 589

COMPONENT OPERATING RANGE

Moter to DTC P0100 in DTC P0100 MASS OR VOLUME AIR FLOW CIRCUIT, DTC P0102 MASS OR VOLUME AIR FLOW CIRCUIT LOW INPUT, DTC P0103 MASS OR VOLUME AIR FLOW CIRCUIT HIGH INPUT .

P0110

Scheme 590

P0112

Scheme 591

P0113

Scheme 592

Scheme 593

Scheme 594

P0115

Scheme 595

P0117

Scheme 596

P0118

Scheme 597

Scheme 598

Scheme 599

TYPICAL ENABLING CONDITIONS

All

Scheme 600

ECT sensor stuck (low ECT)

Scheme 601

ECT sensor stuck (high ECT)

Scheme 602

ECT sensor stuck (low ECT)

Scheme 603

ECT sensor stuck (high ECT)

Scheme 604

Scheme 605

P0120

Scheme 606

P0122

Scheme 607

P0123

Scheme 608

P0220

Scheme 609

P0222

Scheme 610

P0223

Scheme 611

P2135

Scheme 612

Scheme 613

FAIL SAFE

If the ETCS has a malfunction, the ECM cuts off current to the throttle control motor. The throttle valve returns predetermined opening angle (approximately 16°) by the force of the return spring. The ECM then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition timing in accordance with the accelerator pedal opening angle to enable the vehicle to continue at a minimal speed.

If the accelerator pedal is depressed firmly and slowly, the vehicle can be driven slowly.

If a "pass" condition is detected and then the ignition switch is turned OFF, the fail-safe operation will stop and the system will return to normal condition.

Scheme 614

If the ETCS has a malfunction, the ECM cuts off current to the throttle control motor. The throttle valve returns to a predetermined opening angle (approximately 16°) by the force of the return spring. The ECM then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition timing in accordance with the accelerator pedal opening angle to enable the vehicle to continue at a minimal speed.

If the accelerator pedal is depressed firmly and slowly, the vehicle can be driven slowly.

If a "pass" condition is detected and then the ignition switch is turned OFF, the fail-safe operation will ST and the system will return to normal condition.

HO2S voltage (P0130 and P0150)

Scheme 615

HO2S voltage stuck Lean (P2195 and P2197)

Scheme 616

HO2S voltage stuck Rich (P2196 and P2198)

Scheme 617

Scheme 618

MONITOR RESULT

Refer to CHECKING MONITOR STATUS for detailed information.

Scheme 619

TYPICAL ENABLING CONDITION

All

Scheme 620

HO2S (sensor 1) slow slope

Scheme 621

HO2S (sensor 1) frequency

Scheme 622

HO2S (sensor 1) slow slope

Scheme 623

HO2S (sensor 1) frequency

Scheme 624

Refer to CHECKING MONITOR STATUS for detailed information.

Scheme 625

All

Scheme 626

HO2S voltage

Scheme 627

HO2S element

Scheme 628

HO2S response

Scheme 629

HO2S voltage

Scheme 630

HO2S element

Scheme 631

HO2S response

Scheme 632

Scheme 633

Refer to CHECKING MONITOR STATUS for detailed information.

Scheme 634

Fuel trim Lean

Scheme 635

Fuel trim Rich

Scheme 636

P0301 to P0308

Scheme 637

Emission-related-misfire

Scheme 638

Catalyst-damage-misfire

Scheme 639

Refer to CHECKING MONITOR STATUS for detailed information.

Scheme 640

Knock sensor rationality

Scheme 641

Knock sensor range check (chattering)

Scheme 642

Knock sensor range check (low voltage)

Scheme 643

Knock sensor range check (high voltage)

Scheme 644

Scheme 645

All

Scheme 646

Scheme 647

Scheme 648

Scheme 649

Scheme 650

All

Scheme 651

VVT sensor range check (while staring engine)

Scheme 652

VVT sensor range check (after staring engine)

Scheme 653

VVT sensor malfunction

None

VVT sensor range check

Scheme 654

VVT sensor malfunction

Scheme 655

Scheme 656

IGF SIGNAL OPERATING RANGE DESCRIPTION

Scheme 657

Scheme 658

Refer to CHECKING MONITOR STATUS for detailed information.

Scheme 659

Scheme 660

1. Connect the hand-held tester to the Controller Area Network Vehicle Interface Module (CAN VIM). Then connect the CAN VIM to the DLC3.
2. Start the engine and warm it up with all the accessories switched OFF until the ECT becomes stable.
3. Run the engine at 2,500 to 3,000 RPM for about 3 minutes.

HINT

Control the engine RPM so that the calculated catalyst temperature can be between 550 and 800 °C (1,022 and 1,472°F). The calculated catalyst temperatures of bank 1 and bank 2 can be read by viewing CAT TEMP B1S1 and CAT TEMP B2S1 of the DATA LIST.

Confirm that HO2S bank 1 sensor 1 (OX1A) and bank 2 sensor 1 (OX2A) have waveforms that are around 0.5 V during feedback to the ECM. Then check the waveform of HO2S bank 1 sensor 2 (OX1B) and bank 2 sensor 2 (OX2B) for the same waveforms (0.5 V during feedback).

HINT

If there is a malfunction in the catalyst, the waveform of the rear HO2S (OX1B, OX2B) is almost the same as that of the front HO2S (OX1A, OX2A), which is shown on the left.

Scheme 661

EVAP VSV stuck close (P0441)

Scheme 662

EVAP VSV stuck open (P0441)

Scheme 663

EVAP 0.04 inch leak (P0442)

Scheme 664

CCV stuck close (P0446)

Scheme 665

CCV stuck open (P0446)

Scheme 666

Bypass VSV malfunction (P2418)

Scheme 667

EVAP gross leak (P0455)

Scheme 668

EVAP 0.02 inch leak (P0456)

Scheme 669

Refer to CHECKING MONITOR STATUS for detailed information.

Scheme 670

Scheme 671

Scheme 672

1. The vehicle must be cold and the ambient tempera must be between 10 to 35°C (50 to 95°F).
2. The IAT and the ECT have almost the same values.
3. Clear the DTCs (see «DTC CHECK/CLEAR»(ref-209347-S24476769982005120900000) ). Enter the following menus: ADVANCED OBD II / ON-BOARD TEST/ READINESS TESTS. Then the READINESS TEST will show INCMPL (incomplete).
4. Drive the vehicle according to the LA#4 driving cycle Note the state of the READINESS TEST. They will change to COMPL (complete) as the EVAP evaluation monitors (EVAP EVAL) operate and if the system passes. This procedure may take 20 minutes or more. NOTE: Do not shut off the engine - the results will be invalid.

Pass Condition or No Problem Found by the ECM

If EVAP EVAL shows COMPL, go to the NON-CONTINUOUS TEST screen.

Enter the following menus: ADVANCED OBD II / ONBOARD TEST / NON-CONTINUOUS TESTS.

Note. Do not shut off the engine or the results will be invalid.

Scheme 673

If all of the tests in the time $02 category show "Pass", EVAP EVAL detected no problems.

Scheme 674

Fail Condition - Problem Detected by the ECM

If EVAP EVAL shows INCMPL, go to the NON-CONTINUOUS TEST screen.

Enter the following menus: ADVANCED OBD II / ONBOARD TEST / NON-CONTINUOUS TESTS.

Scheme 675

Scheme 676

Scheme 677

1. If all tests show "Pass", the following may have occurred. EVAP EVAL did not operate. EVAP EVAL did not finish. The ECM withheld judgement.
2. If one or more of the tests in the time $02 category show Fail, EVAP EVAL did operate and the ECM detected a problem.
3. Go to the CONTINUOUS TESTS screen. This is the only place DTC's are listed for the first trip. Enter the following menus: ADVANCED OBD II/ ONBOARD TEST/ CONTINUOUS TESTS. NOTE: The DTC listed may not be valid. A second trip is needed to confirm the DTC.

Scheme 678

Scheme 679

1. Vehicle must be cold and the ambient temperature must be between 10 to 35°C (50 to 95 °F).
2. Go to the «READINESS TESTS»(ref-209347-S32152843582005120900000) screen.
3. Drive the vehicle according to the LA#4 drive cycle. Note the state of EVAP EVAL. This procedure may take approximately 20 minutes or more. NOTE: Do not shut off the engine or the results will be invalid.
4. If the READINESS TEST changes to COMPL, the EVAP EVAL has operated. Check for any stored DTC's. If a DTC has been stored, a problem has been detected and confirmed by the ECM. If no DTC was stored, the EVAP monitor operated but no problem was detected.

FTP sensor noise (P0451)

Scheme 680

FTP sensor stuck (P0451)

Scheme 681

FTP sensor range check (low voltage) (P0452)

Scheme 682

FTP sensor range check (high voltage) (P0453)

Scheme 683

Scheme 684

IAC functional check

Scheme 685

IAC range check

Scheme 686

ECM RAM errors

Scheme 687

ECM CPU malfunction

Scheme 688

ETCS power supply

Scheme 689

CMP sensor range check (P1340)

Scheme 690

CMP/CKP misalignment (P1340)

Scheme 691

CMP sensor malfunction (P1341)

Scheme 692

Scheme 693

P2102

Scheme 694

P2103

Scheme 695

If the ETCS, has a malfunction, the ECM cuts off current to the throttle actuator. The throttle valve returns to a predetermined opening angle (approximately 16°) by the force of the return spring. The ECM then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition timing in accordance with the accelerator pedal opening angle to enable the vehicle to continue at a minimal speed.

If the accelerator pedal is depressed firmly and slowly, the vehicle can be driven slowly.

If a "pass" condition is detected and then the ignition switch is turned OFF, the fail-safe operation will stop and the system will return to normal condition.

Scheme 696

If the ETCS has a malfunction, the ECM cuts off current to the throttle actuator. The throttle valve returns predetermined opening angle (approximately 16°) by the force of the return spring. The ECM then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition timing in accordance with the accelerator pedal opening angle to enable the vehicle to continue at a minimal speed. If the accelerator pedal is depressed firmly and slowly, the vehicle can be driven slowly.

If a "pass" condition is detected and then the ignition switch is turned OFF, the fail-safe operation will stop and the system will return to normal.

If the ETCS has a malfunction, the ECM cuts off current to the throttle actuator. The throttle valve returns to a predetermined opening angle (approximately 16°) by the force of the return spring. The ECM then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition timing in accordance with the accelerator pedal opening angle to enable the vehicle to continue at a minimal speed. If the accelerator pedal is depressed firmly and slowly, the vehicle can be driven slowly.

If a "pass" condition is detected and then the ignition switch is turned OFF, the fail-safe operation will stop and the system will return to normal.

Scheme 697

If the ETCS has a malfunction, the ECM shuts off current to the throttle actuator. The throttle valve returns to a predetermined opening angle (approximately 16°) by the force of the return spring. The ECM then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition timing in accordance with the accelerator pedal opening angle to enable the vehicle to continue at a minimal speed. If the accelerator pedal is depressed firmly and slowly, the vehicle can be driven slowly.

If a "pass" condition is detected and then the ignition switch is turned OFF, the fail-safe operation will stop and the system will return to normal.

P2120

Scheme 698

P2122

Scheme 699

P2123

Scheme 700

P2125

Scheme 701

P2127

Scheme 702

P2128

Scheme 703

P2138

Scheme 704

Scheme 705

The APP sensor has two (main and sub) sensor circuits. If a malfunction occurs in either of the sensor circuits, the ECM detects the abnormal signal voltage difference between the two sensor circuits and changes to limp mode. In limp mode, the remaining circuit is used to calculate the accelerator pedal opening angle to allow the vehicle to continue driving.

If both circuits malfunction, the ECM regards the opening angle of the accelerator pedal to be fully closed.

In this case, the throttle valve will remain closed as if the engine is idling.

If a "pass" condition is detected and then the ignition switch is turned OFF, the fail-safe operation will stop and the system will return to normal condition.

Scheme 706

The APP sensor has two (main and sub) sensor circuits. If a malfunction occurs in either of the sensor circuits, the ECM detects the abnormal signal voltage difference between the two sensor circuits and changes to limp mode. In limp mode, the remaining circuit is used to calculate the accelerator pedal opening angle to allow the vehicle to continue driving.

If both circuits malfunction, the ECM regards the opening angle of the accelerator pedal to be fully closed. In this case, the throttle valve will remain closed as if the engine is idling.

If a "pass" condition is detected and then the ignition switch is turned OFF, the fail-safe operation will stop and the system will return to normal condition.