Engine Control System (2GR-FE) (Diagnostics - Introduction): Diagnosis Toyota Venza I facelift

HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ]

HINT

*: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP NEXT: Go to next step
2. CUSTOMER PROBLEM ANALYSIS NEXT: Go to next step
3. CONNECT TECHSTREAM TO DLC3* HINT: If the display indicates a communication fault with the Techstream, inspect the DLC3. When any CAN communication system DTCs are output, perform troubleshooting on the CAN communication system first. NEXT: Go to next step
4. CHECK DTC AND FREEZE FRAME DATA* HINT: Record or print DTCs and freeze frame data, if necessary. NEXT: Go to next step
5. CLEAR DTC AND FREEZE FRAME DATA* NEXT: Go to next step
6. CONDUCT VISUAL INSPECTION NEXT: Go to next step
7. SELECT CHECK MODE DIAGNOSIS* HINT: Refer to Check Mode Procedure. Refer to «CHECK MODE PROCEDURE [08/2013 - ]»(ref-649258-S25069257912014081400000) . NEXT: Go to next step
8. CONFIRM PROBLEM SYMPTOMS HINT: Refer to Problem Symptoms Table. Refer to «PROBLEM SYMPTOMS TABLE [08/2013 - ]»(ref-649258-S18022642062014081400000) . If the engine does not start, first perform the "Check DTC" procedure and "Conduct Basic Inspection" procedure below. Result Proceed to Malfunction does not occur A Malfunction occurs B B --> GO TO STEP 10 A: Go to next step
9. SIMULATE SYMPTOMS HINT: Refer to Problem Symptoms Table. Refer to «PROBLEM SYMPTOMS TABLE [08/2013 - ]»(ref-649258-S18022642062014081400000) . NEXT: Go to next step
10. CHECK DTC* HINT: Refer to DTC Check / Clear. Refer to «DTC CHECK / CLEAR [08/2013 - ]»(ref-649258-S07470507852014081400000) . Result Proceed to Trouble code A No code B B --> GO TO STEP 12 A: Go to next step
11. REFER TO DTC CHART HINT: Refer to Diagnostic Trouble Code Chart. Refer to «DIAGNOSTIC TROUBLE CODE CHART [08/2013 - ]»(ref-649258-S29699066962014081400000) . NEXT: Go to next step
12. CONDUCT BASIC INSPECTION Result Proceed to Malfunctioning parts not confirmed A Malfunctioning parts confirmed B B --> GO TO STEP 17 A: Go to next step
13. REFER TO PROBLEM SYMPTOMS TABLE HINT: Refer to Problem Symptoms Table. Refer to «PROBLEM SYMPTOMS TABLE [08/2013 - ]»(ref-649258-S18022642062014081400000) . Result Proceed to Malfunctioning circuit confirmed A Malfunctioning parts confirmed B B --> GO TO STEP 17 A: Go to next step
14. CHECK ECM POWER SOURCE CIRCUIT HINT: Refer to ECM Power Source Circuit. Refer to «ECM Power Source Circuit [08/2013 - ]»(ref-649439-S20329327232014081400000) . NEXT: Go to next step
15. CONDUCT CIRCUIT INSPECTION Result Proceed to Malfunction not confirmed A Malfunction confirmed B B --> GO TO STEP 18 A: Go to next step
16. CHECK FOR INTERMITTENT PROBLEMS NEXT: Go to next step
17. CONDUCT PARTS INSPECTION NEXT: Go to next step
18. IDENTIFY PROBLEM NEXT: Go to next step
19. ADJUST AND/OR REPAIR NEXT: Go to next step
20. CONDUCT CONFIRMATION TEST NEXT --> END

BASIC INSPECTION [08/2013 - ]

When the malfunction is not confirmed by the DTC check, troubleshooting should be carried out in all circuits considered to be possible causes of the problem. In many cases, by carrying out the basic engine check shown in the following procedure, the location of the problem can be found quickly and efficiently. Therefore, using this check is essential when engine troubleshooting.

1. CHECK BATTERY VOLTAGE NOTE: Carry out this check with the engine stopped and the ignition switch off. Result Result Proceed to 11 V or more OK Below 11 V NG NG --> CHARGE OR REPLACE BATTERY OK: Go to next step
2. CHECK WHETHER ENGINE CRANKS NG --> PROCEED TO PROBLEM SYMPTOMS TABLE OK: Go to next step
3. CHECK WHETHER ENGINE STARTS NG --> GO TO STEP 6 OK: Go to next step
4. CHECK AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY Visually check that the air cleaner filter element sub-assembly is not excessively contaminated with dirt or oil. NG --> REPLACE AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY OK: Go to next step
5. CHECK IDLE SPEED NG --> TROUBLESHOOT IDLE SPEED AND PROCEED TO NEXT STEP OK: Go to next step
6. CHECK FUEL PRESSURE NG --> TROUBLESHOOT FUEL PRESSURE AND PROCEED TO NEXT STEP OK: Go to next step
7. CHECK FOR SPARK NG --> TROUBLESHOOT IGNITION SYSTEM AND PROCEED TO NEXT STEP OK --> PROCEED TO PROBLEM SYMPTOMS TABLE

PROBLEM SYMPTOMS TABLE [08/2013 - ]

HINT

1. Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
2. Inspect the fuses and relays related to this system before inspecting the suspected areas below.

SFI SYSTEM

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1. SFI SYSTEM HINT: The standard normal voltage between each pair of the ECM terminals is shown in the table below. The appropriate conditions for checking each pair of the terminals are also indicated. The result of checks should be compared with the standard normal voltage for that pair of terminals, displayed in the Specified Condition column. The illustration above can be used as a reference to identify the ECM terminal locations. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition A41-3 (+B) - B39-81 (E1) R - W Power source of ECM Ignition switch ON 11 to 14 V A41-2 (+B2) - B39-81 (E1) GR - W Power source of ECM Ignition switch ON 11 to 14 V A41-1 (BATT) - B39-81 (E1) V - W Battery (for measuring the battery voltage and for the ECM memory) Always 11 to 14 V B39-41 (+BM) - B39-81 (E1) BR - W Power source of electronic throttle control system throttle motor Always 11 to 14 V A41-34 (MREL) - B39-81 (E1) Y - W EFI MAIN relay operation signal Ignition switch ON 11 to 14 V B39-80 (VCTA) - B39-79 (ETA) Y-B - W-B Power source for throttle position sensor (specific voltage) Ignition switch ON 4.5 to 5.5 V B39-67 (VCV1) - B39-81 (E1) P - W Power source for VVT sensor (specific voltage) Ignition switch ON 4.5 to 5.5 V B39-66 (VCV2) - B39-81 (E1) R - W Power source for VVT sensor (specific voltage) Ignition switch ON 4.5 to 5.5 V A41-28 (IGSW) - B39-81 (E1) SB - W Ignition switch signal Ignition switch ON 11 to 14 V A41-52 (FC) - B39-81 (E1) LG - W C/OPN relay operation signal (fuel pump control) Ignition switch ON 11 to 14 V Idling with warm engine 0 to 1.5 V A41-36 (STP) - B39-81 (E1) G - W Stop light switch assembly signal Brake pedal depressed 7.5 to 14 V Brake pedal released 0 to 1.5 V A41-35 (ST1-) - B39-81 (E1) V - W Stop light switch assembly signal (opposite to STP terminal) Ignition switch ON, brake pedal depressed 0 to 1.5 V Ignition switch ON, brake pedal released 7.5 to 14 V A41-55 (VPA) - A41-58 (EPA) L - GR Accelerator pedal position sensor signal (for engine control) Ignition switch ON, accelerator pedal fully released 0.5 to 1.1 V Ignition switch ON, accelerator pedal fully depressed 2.6 to 4.5 V A41-56 (VPA2) - A41-60 (EPA2) BE - LG Accelerator pedal position sensor signal (for sensor malfunction detection) Ignition switch ON, accelerator pedal fully released 1.2 to 2.0 V Ignition switch ON, accelerator pedal fully depressed 3.4 to 4.75 V A41-30 (VPMP) - B39-81 (E1) BE - W Vent valve (built into canister pump module) Ignition switch ON 11 to 14 V A41-49 (MPMP) - B39-81 (E1) V - W Leak detection pump (built into canister pump module) Leak detection pump off 0 to 3.0 V Leak detection pump on 9 to 14 V B39-121 (PPMP) - B39-81 (E1) Y - W Canister pressure sensor (built into canister pump module) Ignition switch ON 3.0 to 3.6 V A41-16 (TC) - B39-81 (E1) V - W Terminal TC of DLC3 Ignition switch ON 11 to 14 V A41-57 (VCPA) - A41-58 (EPA) G - GR Power source of accelerator pedal position sensor (for VPA) Ignition switch ON 4.5 to 5.5 V A41-59 (VCP2) - A41-60 (EPA2) Y - LG Power source of accelerator pedal position sensor (for VPA2) Ignition switch ON 4.5 to 5.5 V A41-15 (TACH) - B39-81 (E1) Y - W Engine speed signal (for combination meter assembly) Idling with warm engine Pulse generation (see waveform 12) A41-13 (SPD) - B39-81 (E1) BR - W Vehicle speed signal from combination meter assembly Driving at 12 mph (20 km/h) Pulse generation (see waveform 9) A41-24 (W) - B39-81 (E1) R - W Malfunction Indicator Lamp (MIL) operation signal Ignition switch ON Below 3.0 V Idling with warm engine 11 to 14 V A41-10 (CANH) - B39-81 (E1) Y - W CAN communication line Engine stopped and ignition switch ON Pulse generation (see waveform 13) A41-11 (CANL) - B39-81 (E1) W - W CAN communication line Engine stopped and ignition switch ON Pulse generation (see waveform 14) B39-81 (E1) - Body ground W - - Earth (ground) circuit of ECM Always Below 1 ohms B39-86 (#10) - B39-43 (E01) B39-109 (#20) - B39-43 (E01) B39-85 (#30) - B39-43 (E01) B39-108 (#40) - B39-43 (E01) B39-84 (#50) - B39-43 (E01) B39-107 (#60) - B39-43 (E01) L - W-B Y - W-B R - W-B L-R - W-B B-R - W-B G - W-B Fuel injector assembly operation signal Ignition switch ON 11 to 14 V B39-86 (#10) - B39-43 (E01) B39-109 (#20) - B39-43 (E01) B39-85 (#30) - B39-43 (E01) B39-108 (#40) - B39-43 (E01) B39-84 (#50) - B39-43 (E01) B39-107 (#60) - B39-43 (E01) L - W-B Y - W-B R - W-B L-R - W-B B-R - W-B G - W-B Fuel injector assembly operation signal Idling with warm engine Pulse generation (see waveform 3) B39-52 (OC2+) - B39-51 (OC2-) L-R - G-B Camshaft timing oil control valve assembly operation signal (Intake side) Idling Pulse generation (see waveform 1) B39-58 (OC1+) - B39-57 (OC1-) G-W - G-R Camshaft timing oil control valve assembly operation signal (Intake side) Idling Pulse generation (see waveform 1) B39-87 (VV2+) - B39-88 (VV2-) P - Y VVT sensor signal (Intake side) Idling with warm engine Pulse generation (see waveform 6) B39-90 (VV1+) - B39-89 (VV1-) L - LG VVT sensor signal (Intake side) Idling with warm engine Pulse generation (see waveform 6) B39-110 (NE+) - B39-111 (NE-) R - G Crankshaft position sensor signal Idling with warm engine Pulse generation (see waveform 5, 6) A41-7 (NEO)*2 - B39-81 (E1) GR - W Crankshaft position sensor signal Idling with warm engine Pulse generation (see waveform 16) B39-64 (EV2+) - B39-89 (VV1-) GR - LG VVT sensor signal (Exhaust side) Idling with warm engine Pulse generation (see waveform 5) B39-69 (EV1+) - B39-89 (VV1-) Y - LG VVT sensor signal (Exhaust side) Idling with warm engine Pulse generation (see waveform 5) B39-56 (OE1+) - B39-55 (OE1-) G - LG Camshaft timing oil control valve assembly operation signal (Exhaust side) Idling Pulse generation (see waveform 1) B39-50 (OE2+) - B39-49 (OE2-) G-R - G Camshaft timing oil control valve assembly operation signal (Exhaust side) Idling Pulse generation (see waveform 1) B39-18 (M-) - B39-82 (ME01) L - W-B Throttle actuator operation signal (negative terminal) Idling with warm engine Pulse generation (see waveform 11) B39-19 (M+) - B39-82 (ME01) Y - W-B Throttle actuator operation signal (positive terminal) Idling with warm engine Pulse generation (see waveform 10) B39-42 (E02) - Body ground W - - Earth (ground) circuit of ECM Always Below 1 ohms B39-43 (E01) - Body ground W-B - - Earth (ground) circuit of ECM Always Below 1 ohms B39-40 (IGT1) - B39-81 (E1) B39-39 (IGT2) - B39-81 (E1) B39-38 (IGT3) - B39-81 (E1) B39-37 (IGT4) - B39-81 (E1) B39-36 (IGT5) - B39-81 (E1) B39-35 (IGT6) - B39-81 (E1) R-L - W P - W Y-B - W L-Y - W G-Y - W L-R - W Ignition coil assembly (ignition signal) Idling with warm engine Pulse generation (see waveform 7) B39-17 (GE01) - B39-81 (E1) R - W Shielded earth (ground) circuit of throttle actuator Always Below 1 V B39-114 (OX1B) - B39-115 (EX1B) B39-112 (OX2B) - B39-113 (EX2B) B - GR W - GR Heated oxygen sensor signal Engine speed is maintained at 2500 RPM for 2 minutes after warming up engine Pulse generation (see waveform 2) B39-77 (VTA2) - B39-79 (ETA) B-R - W-B Throttle position sensor signal (for sensor malfunction detection) Ignition switch ON, accelerator pedal fully released 2.1 to 3.1 V Ignition switch ON, accelerator pedal fully depressed 4.6 to 5.0 V B39-78 (VTA1) - B39-79 (ETA) R-W - W-B Throttle position sensor signal (for engine control) Ignition switch ON, accelerator pedal fully released 0.5 to 1.1 V Ignition switch ON, accelerator pedal fully depressed 3.2 to 4.8 V B39-76 (THW) - B39-97 (ETHW) G-B - W-B Engine coolant temperature sensor signal Idling, engine coolant temperature 60 to 120°C (140 to 248°F) 0.2 to 1.0 V B39-73 (THA) - B39-98 (ETHA) L-B - W Intake air temperature sensor signal Idling, intake air temperature 0 to 80°C (32 to 176°F) 0.5 to 3.4 V B39-104 (IGF1) - B39-81 (E1) W-R - W Ignition coil assembly (ignition confirmation signal) Ignition switch ON 4.5 to 5.0 V Idling with warm engine Pulse generation (see waveform 7) B39-61 (AICV) - B39-81 (E1) V - W Vacuum switching valve for air intake control system operation signal Ignition switch ON 11 to 14 V B39-75 (E2G) - B39-81 (E1) L-W - W Earth (ground) circuit of sensor for mass air flow meter sub-assembly Always Below 1 V B39-74 (VG) - B39-75 (E2G) R - L-W Mass air flow meter sub-assembly signal Idling, shift lever in P or N, A/C switch off 0 to 3.0 V B39-62 (ACIS) - B39-81 (E1) R-Y - W Intake air control valve assembly for acoustic control induction system operation signal Ignition switch ON 11 to 14 V B39-63 (PRG) - B39-81 (E1) G - W Purge VSV for EVAP system operation signal Ignition switch ON 11 to 14 V Idling, under purge control Pulse generation (see waveform 8) B39-20 (HA2A) - B39-21 (E05) R-W - B Air fuel ratio sensor heater operation signal Idling Pulse generation (see waveform 15) B39-22 (HA1A) - B39-23 (E04) W - W-B Air fuel ratio sensor heater operation signal Idling Pulse generation (see waveform 15) B39-82 (ME01) - B39-81 (E1) W-B - W Earth (ground) circuit of ECM Always Below 1 V B39-46 (E03) - B39-81 (E1) W - W Earth (ground) circuit of ECM Always Below 1 V B39-44 (HT2B) - B39-46 (E03) B39-45 (HT1B) - B39-46 (E03) W-L - W R-Y - W Heated oxygen sensor heater operation signal Idling Below 3.0 V B39-83 (ACM) - B39-81 (E1) Y-G - W Duty vacuum switching valve for active control mount system operation signal Ignition switch ON 11 to 14 V B39-21 (E05) - B39-81 (E1) B - W Earth (ground) circuit of ECM Always Below 1 V B39-23 (E04) - B39-81 (E1) W-B - W Earth (ground) circuit of ECM Always Below 1 V B39-120 (NSW) - B39-81 (E1) G - W Park/Neutral position switch assembly signal Ignition switch ON, shift lever in P or N Below 3.0 V Ignition switch ON, shift lever in any position other than P or N 11 to 14 V B39-117 (KNK2) - B39-116 (EKN2) P - G Knock control sensor signal Engine speed is maintained at 4000 RPM after warming up engine Pulse generation (see waveform 4) B39-94 (KNK1) - B39-93 (EKNK) B - W Knock control sensor signal Engine speed is maintained at 4000 RPM after warming up engine Pulse generation (see waveform 4) B39-126 (A1A+) - B39-81 (E1) BR - W Air fuel ratio sensor Ignition switch ON 3.3 V*1 B39-125 (A1A-) - B39-81 (E1) Y - W Air fuel ratio sensor Ignition switch ON 3.0 V*1 B39-103 (A2A+) - B39-81 (E1) P - W Air fuel ratio sensor Ignition switch ON 3.3 V*1 B39-102 (A2A-) - B39-81 (E1) L - W Air fuel ratio sensor Ignition switch ON 3.0 V*1 B39-2 (P) - B39-81 (E1) Y - W P shift position switch signal Ignition switch ON and shift lever in P 11 to 14 V Ignition switch ON and shift lever in any position other than P 0 to 1.5 V B39-26 (R) - B39-81 (E1) V - W R shift position switch signal Ignition switch ON and shift lever in R 11 to 14 V Ignition switch ON and shift lever in any position other than R 0 to 1.5 V B39-25 (N) - B39-81 (E1) L-B - W N shift position switch signal Ignition switch ON and shift lever in N 11 to 14 V Ignition switch ON and shift lever in any position other than N 0 to 1.5 V B39-27 (D) - B39-81 (E1) BR - W D shift position switch signal Ignition switch ON and shift lever in D 11 to 14 V Ignition switch ON and shift lever in any position other than D 0 to 1.5 V A41-25 (S) - B39-81 (E1) BE - W S shift position switch signal Ignition switch ON and shift lever in S 11 to 14 V Ignition switch ON and shift lever in any position other than S 0 to 1.5 V A41-27 (SFTD) - B39-81 (E1) LG - W Down shift switch signal Ignition switch ON and shift lever in S 11 to 14 V Ignition switch ON and shift lever in S, the "-" range (down shift) selected 0 to 1.5 V A41-38 (SFTU) - B39-81 (E1) R - W Up shift switch signal Ignition switch ON and shift lever in S 11 to 14 V Ignition switch ON and shift lever in S, the "+" range (up shift) selected 0 to 1.5 V A41-48 (FPR) - B39-81 (E1) L - W Fuel pump control Cranking 11 to 14 V Idling with warm engine 0 to 1.5 V B39-24 (CAN+) - B39-81 (E1) R - W CAN communication line Engine stopped and ignition switch ON Pulse generation (see waveform 13) B39-1 (CAN-) - B39-81 (E1) W - W CAN communication line Engine stopped and ignition switch ON Pulse generation (see waveform 14) A41-8 (CANP)*2 - B39-81 (E1) G - W CAN communication line Engine stopped and ignition switch ON Pulse generation (see waveform 13) A41-9 (CANN)*2 - B39-81 (E1) W - W CAN communication line Engine stopped and ignition switch ON Pulse generation (see waveform 14) A41-46 (STA) - B39-81 (E1) BR - W Starter signal Cranking 5.5 V or higher A41-43 (RFC) - B39-81 (E1) LG - W Cooling fan control signal ignition switch ON, A/C switch on (Max cool) Pulse generation (see waveform 17) *1: The ECM terminal voltage is constant regardless of the output voltage from the sensor. *2: w/ Smart Key System WAVEFORM 1 Camshaft timing oil control valve assembly operation signal ECM Terminal Name Between OC1+ and OC1-, OC2+ and OC2-, OE1+ and OE1-, or OE2+ and OE2- Tester Range 5 V/DIV, 1 ms./DIV Condition Idling WAVEFORM 2 Heated oxygen sensor signal ECM Terminal Name Between OX1B and EX1B, or OX2B and EX2B Tester Range 0.2 V/DIV., 200 ms./DIV. Condition Engine speed is maintained at 2500 RPM for 2 minutes after warming up engine HINT: In the Data List, item O2S B1S2 and O2S B2S2 shows the ECM values from the heated oxygen sensor. WAVEFORM 3 Fuel injector assembly operation signal ECM Terminal Name Between #10 (to #60) and E01 Tester Range 20 V/DIV., 20 ms./DIV. Condition Idling with warm engine HINT: The wavelength becomes shorter as the engine speed increases. WAVEFORM 4 Knock control sensor signal ECM Terminal Name Between KNK1 and EKNK, or KNK2 and EKN2 Tester Range 1 V/DIV., 1 ms./DIV. Condition Engine speed is maintained at 4000 RPM after warming up engine HINT: The wavelength becomes shorter as the engine speed increases. The waveforms and amplitudes displayed differ slightly depending on the vehicle. WAVEFORM 5 Variable Valve Timing (VVT) sensor for exhaust side signal (A) Crankshaft position sensor signal (B) ECM Terminal Name (A) EV1+ and VV1-, or EV2+ and VV1- (B) Between NE+ and NE- Tester Range 5 V/DIV., 20 ms./DIV. Condition Idling with warm engine HINT: The wavelength becomes shorter as the engine speed increases. WAVEFORM 6 Variable Valve Timing (VVT) sensor for intake side signal (A) Crankshaft position sensor signal (B) ECM Terminal Name (A) Between VV1+ and VV1-, VV2+ and VV2- (B) Between NE+ and NE- Tester Range 5 V/DIV., 20 ms./DIV. Condition Idling with warm engine HINT: The wavelength becomes shorter as the engine speed increases. WAVEFORM 7 Igniter IGT signal (from ECM to igniter) and igniter IGF signal (from igniter to ECM) ECM Terminal Name (1) Between IGT (1 to 6) and E1 (2) Between IGF1 and E1 Tester Range 2 V/DIV., 20 ms./DIV. Condition Idling with warm engine HINT: The wavelength becomes shorter as the engine speed increases. WAVEFORM 8 Purge VSV for EVAP system operation signal ECM Terminal Name Between PRG and E1 Tester Range 10 V/DIV., 20 ms./DIV. Condition Idling, under purge control HINT: If the waveform is not similar to that shown in the illustration, check the waveform again after idling for 10 minutes or more. WAVEFORM 9 Vehicle speed signal ECM Terminal Name Between SPD and E1 Tester Range 2 V/DIV., 20 ms./DIV. Condition Driving at 12 mph (20 km/h) HINT: The wavelength becomes shorter as the vehicle speed increases. Depending on the vehicle, the output waveform voltage may rise to 12 V if influenced by optionally installed systems. WAVEFORM 10 Throttle actuator operation signal (positive terminal) ECM Terminal Name Between M+ and ME01 Tester Range 5 V/DIV., 1 ms./DIV. Condition Idling with warm engine HINT: The duty ratio varies depending on the throttle actuator operation. WAVEFORM 11 Throttle actuator operation signal (negative terminal) ECM Terminal Name Between M- and ME01 Tester Range 5 V/DIV., 1 ms./DIV. Condition Idling with warm engine HINT: The duty ratio varies depending on the throttle actuator operation. WAVEFORM 12 Engine speed signal ECM Terminal Name Between TACH and E1 Tester Range 5 V/DIV., 10 ms./DIV. Condition Idling with warm engine HINT: The wavelength becomes shorter as the engine speed increases. WAVEFORM 13 CAN communication signal (Reference) ECM Terminal Name Between CANH and E1, CAN+ and E1 or CANP and E1 Tester Range 1 V/DIV., 10 μsec./DIV. Condition Engine stopped and ignition switch ON HINT: The waveform varies depending on the CAN communication signal. WAVEFORM 14 CAN communication signal (Reference) ECM Terminal Name Between CANL and E1, CAN- and E1 or CANN and E1 Tester Range 1 V/DIV., 10 μsec./DIV. Condition Engine stopped and ignition switch ON HINT: The waveform varies depending on the CAN communication signal. WAVEFORM 15 Air fuel ratio sensor heater operation signal ECM Terminal Name Between HA1A and E04 or HA2A and E05 Tester Range 5 V/DIV., 10 ms./DIV. Condition Idling WAVEFORM 16 Crankshaft position sensor signal ECM Terminal Name Between NEO and E1 Tester Range 5 V/DIV., 2 ms./DIV. Condition Idling with warm engine HINT: The wavelength becomes shorter as the engine speed increases. WAVEFORM 17 Cooling fan control signal ECM Terminal Name Between RFC and E1 Tester Range 1 V/DIV., 20 ms./DIV. Condition ignition switch ON, A/C switch on (Max cool) HINT: The duty ratio varies depending on the engine coolant temperature.

DIAGNOSIS SYSTEM [08/2013 - ]

1. When troubleshooting OBD II (On-Board Diagnostics) vehicles, the Techstream (complying with SAE J1987) must be connected to the DLC3 (Data Link Connector 3) of the vehicle. Various data in the vehicle's ECM (Engine Control Module) can be then read.

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1. OBD II regulations require that the vehicle's on-board computer illuminates the MIL (Malfunction Indicator Lamp) on the instrument panel when the computer detects a malfunction in: The emission control system and components. The powertrain control components (which affect vehicle emissions). The computer itself.

1. In addition, the applicable DTCs prescribed by SAE J2012 are stored in the ECM memory. If the malfunction does not recur in 3 consecutive trips, the MIL turns off automatically but the DTCs remain stored in the ECM memory.

1. To check the DTCs, connect the Techstream to the DLC3. The Techstream displays output DTCs, freeze frame data, and a variety of engine data. The DTCs and freeze frame data can be cleared with the Techstream. In order to enhance OBD function on vehicles and develop the Off-Board diagnosis system, Controller Area Network (CAN) communication is used in this system. CAN is a network which uses a pair of data transmission lines spanning multiple computers and sensors. It allows for high speed communications between the systems and simplification of the wire harness connections.

1. 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 as an option for technicians. In check mode, 1 trip detection logic is used for duplicating malfunction symptoms and increasing the system's ability to detect malfunctions, including intermittent problems (the Techstream only).
2. 2 TRIP DETECTION LOGIC When a malfunction is first detected, the malfunction is temporarily stored in the ECM memory (1st trip). If the same malfunction is detected during the subsequent driving cycle, the MIL is illuminated (2nd trip).
3. FREEZE FRAME DATA The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.
4. DLC3 (Data Link Connector 3) Check the DLC3. Refer to «GENERAL INFORMATION [08/2013 - ]»(ref-649249-S38944947632014081400000) .
5. BATTERY VOLTAGE Standard Voltage 11 to 14 V If voltage is below 11 V, replace or recharge the battery before proceeding to the next step.
6. MIL (Malfunction Indicator Lamp) The MIL illuminates when the ignition switch is turned to ON (the engine is not running). The MIL should turn off when the engine is started. If the MIL remains illuminated, the diagnosis system has detected a malfunction or abnormality in the system. HINT: If the MIL does not illuminate when the ignition switch is turned to ON, check the MIL circuit. Refer to «MIL Circuit [08/2013 - ]»(ref-649439-S30354567032014081400000) .
7. ALL READINESS HINT: With "All Readiness", you can check whether or not the DTC judgment has been completed by using the Techstream. You should check "All Readiness" after duplicating malfunction symptoms or for validation after finishing repairs. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR [08/2013 - ]»(ref-649258-S07470507852014081400000) . Perform the DTC judgment driving pattern to run the DTC judgment. Enter the following menus: Powertrain / Engine / Utility / All Readiness. Input the DTCs to be confirmed. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform the driving pattern after confirming the DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU's memory limit

DTC CHECK / CLEAR [08/2013 - ]

Note. When the diagnosis system is changed from normal mode to check mode or vice versa, all DTCs and freeze frame data recorded in normal mode are cleared. Before changing modes, always check and make a note of DTCs and freeze frame data.

HINT

1. DTCs which are stored in the ECM can be displayed on the Techstream. The Techstream can display the current, pending and permanent DTCs.
2. If a malfunction is detected during the current driving cycle, current and permanent DTCs are stored.
3. Some DTCs are not stored if the ECM does not detect the same malfunction again during a second consecutive driving cycle. However, such malfunctions, detected on only one occasion, are stored as pending DTCs.
4. Current and pending DTCs can be cleared by using the Techstream or by disconnecting the cable from the negative (-) battery terminal. However, permanent DTCs cannot be cleared using either of these 2 methods.
5. After clearing current DTCs using the Techstream or by disconnecting the cable from the negative (-) battery terminal, permanent DTCs can be cleared when the system is determined to be normal for the relevant DTCs and then the universal trip is performed. The driving pattern to obtain a normal judgment is described under the "CONFIRMATION DRIVING PATTERN" for the respective DTC.

2 TRIP DETECTION EXAMPLES

Scheme 61

Scheme 62

HINT

1. Obtaining a normal judgment and performing a universal trip driving pattern can be done in the same driving cycle or in different driving cycles.
2. It is unnecessary to obtain a normal judgment if the DTCs are misfire or fuel system DTCs.

Scheme 63

1. CHECK DTC Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Trouble Codes. Check the DTC(s) and freeze frame data, and then write them down. Check the details of the DTC(s). Refer to «DIAGNOSTIC TROUBLE CODE CHART [08/2013 - ]»(ref-649258-S29699066962014081400000) .
2. CLEAR DTC (Pending and Current DTC) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Trouble Codes. Clear the DTCs.
3. CLEAR DTC (Pending and Current DTC without using Techstream) Perform either of the following operations: Disconnect the cable from the negative (-) battery terminal for more than 1 minute. Remove the EFI No. 1 and ETCS fuses from the engine room relay block located inside the engine compartment for more than 1 minute.
4. CLEAR PERMANENT DTC HINT: Even if the following procedure is not performed, permanent DTCs are cleared by obtaining a normal judgment during 3 consecutive driving cycles. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Trouble Codes. Check if permanent DTCs are stored. HINT: If permanent DTCs are not output, it is not necessary to continue this procedure. Clear the DTCs. Perform the respective confirmation driving patterns in order to obtain a normal judgment for the output DTCs. HINT: Confirmation driving patterns do not need to be performed for misfire and fuel system DTCs. For the confirmation driving pattern, refer to the procedures for the relevant DTC. Refer to «DIAGNOSTIC TROUBLE CODE CHART [08/2013 - ]»(ref-649258-S29699066962014081400000) . Perform the universal trip. HINT: The driving pattern to obtain a normal judgment and the universal trip driving can be performed consecutively in the same driving cycle. Idle the engine for 30 seconds or more. Drive the vehicle at 25 mph (40 km/h) or more for a total of 5 minutes or more. WARNING: When performing the confirmation driving pattern, obey all speed limits and traffic laws. HINT: It is possible to complete the drive pattern even if the vehicle decelerates to less than 25 mph (40 km/h) during the driving cycle provided that the vehicle is driven at 25 mph (40 km/h) or more for a total of 5 minutes. Allow 10 minutes or more to elapse from the time the engine is started. Enter the following menus: Powertrain / Engine / Trouble Codes. Check that the permanent DTCs have been cleared. HINT: The permanent DTCs are cleared when the universal trip is completed.

DIAGNOSTIC TROUBLE CODE CHART [08/2013 - ]

HINT

Parameters listed in the chart may not be exactly the same as your readings due to the type of instrument or other factors. If a trouble code is displayed during the DTC check, inspect the trouble areas listed for that code. For details of the code, follow the "Refer To" reference.

*1: MIL flashes when a catalyst damaging misfire is detected

ENGINE CONTROL SYSTEM