Engine Control System (Diagnostics - Introduction): Other Scion FR-S I

PRECAUTION [07/2013 - 12/2013]

1. INITIALIZATION NOTE: If the ECM is replaced, register the ECU communication ID for Immobiliser System. Perform Registration (VIN registration) when replacing the ECM. Refer to «REGISTRATION [07/2013 - ]»(ref-612245-S10147635462014042900000) .
2. WHEN USING TECHSTREAM WARNING: Observe the following items for safety reasons: Before using the Techstream, read the instruction manual. Prevent the Techstream cable from being caught on the pedals, shift lever or steering wheel when driving with the Techstream connected to the vehicle. When driving the vehicle for testing purposes using the Techstream, 2 persons are required. One is for driving the vehicle, and the other operates the Techstream.

PRECAUTION [12/2013 - ]

1. INITIALIZATION NOTE: If the ECM is replaced, register the ECU communication ID for Immobiliser System. w/ Smart Key System. Refer to «REGISTRATION [12/2013 - ]»(ref-612251-S41700728192014042900000) w/o Smart Key System. Refer to «REGISTRATION [07/2013 - ]»(ref-612246-S02324431092014042900000) Perform Registration (VIN registration) when replacing the ECM. Refer to «REGISTRATION [07/2013 - ]»(ref-612245-S10147635462014042900000) .
2. WHEN USING TECHSTREAM WARNING: Observe the following items for safety reasons: Before using the Techstream, read the instruction manual. Prevent the Techstream cable from being caught on the pedals, shift lever or steering wheel when driving with the Techstream connected to the vehicle. When driving the vehicle for testing purposes using the Techstream, 2 persons are required. One is for driving the vehicle, and the other operates the Techstream.
3. IGNITION SWITCH EXPRESSIONS The type of ignition switch used on this model differs according to the specifications of the vehicle. The expressions listed in the table below are used in this Service Information. Expression Ignition Switch (Position) Engine Switch (Condition) Ignition Switch off LOCK Off (Lock) Ignition Switch ACC ACC On (ACC) Ignition Switch ON ON On (IG) Engine Start START On (Start)

DEFINITION OF TERMS [07/2013 - ]

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CHECK FOR INTERMITTENT PROBLEMS [07/2013 - ]

HINT

Inspect the vehicle ECM using check mode. Intermittent problems are easier to detect with the Techstream when the ECM is in check mode. In check mode, the ECM uses 1 trip detection logic, which is more sensitive to malfunctions than normal mode (default), which uses 2 trip detection logic.

1. Clear DTCs. Refer to «DTC CHECK / CLEAR [07/2013 - ]»(ref-612245-S39444024262014042900000) .
2. Switch the ECM from normal mode to check mode using the Techstream. Refer to «CHECK MODE PROCEDURE [07/2013 - ]»(ref-612245-S42753438502014042900000) .
3. Perform a simulation test.
4. Check and wiggle the harness(es), connector(s) and terminal(s).

REGISTRATION [07/2013 - ]

Note. The Vehicle Identification Number (VIN) must be input into a replacement ECM.

HINT

The VIN is a 17-digit alphanumeric vehicle identification number. The Techstream is required to register the VIN.

1. DESCRIPTION (Using the Techstream) HINT: This registration Service Information consists of 2 parts: Read VIN and Write VIN. Read VIN: This process allows the VIN stored in the ECM to be read in order to confirm that the 2 VINs, provided with the vehicle and stored in the vehicle ECM, are the same. Write VIN: This process allows the VIN to be input into the ECM. If the ECM is replaced, or the ECM VIN and vehicle VIN do not match, the VIN can be registered, or overwritten in the ECM by following this procedure.
2. READ VIN Confirm the vehicle VIN. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Utility / VIN / VIN Read.
3. WRITE VIN Confirm the vehicle VIN. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Utility / VIN / VIN Write.

CHECKING MONITOR STATUS [07/2013 - 12/2013]

The purpose of the monitor result (mode 06) is to allow access to the results of on-board diagnostic monitoring tests of specific components/systems that are not continuously monitored. Examples are catalysts and evaporative emissions (EVAP) systems.

The monitor result allows the OBD II scan tool to display the monitor status, test value, minimum test limit and maximum test limit. These data are displayed after the vehicle has been driven to run the monitor.

When the test value is not between the minimum and maximum test limits, the ECM (PCM) interprets this as a malfunction. If the test value is on the borderline of the test limits, the component is likely to malfunction in the near future.

Perform the following procedures to view the monitor status. Although these procedures refer to the Lexus/Toyota Techstream, the monitor status can be checked using a generic OBD II scan tool. Refer to your scan tool operator's manual for specific procedural information.

1. ACCESS MONITOR RESULT Enter the following menus: Generic OBD II. Confirm the monitor status for each component. HINT: The monitor status for each component is displayed in the Result column. Pass: The component is functioning normally. Fail: The component is malfunctioning. Display the test results and test values for a monitor by selecting the icon in the Details column for that monitor.
2. CHECK COMPONENT STATUS Compare the test value with the minimum test limit (Min Limit) and maximum test limit (Max Limit). If the test value is between the minimum and maximum test limits, the component is functioning normally. If not, the component is malfunctioning. The test value is usually not near the test limits. If the test value is on the borderline of the test limits, the component is likely to malfunction in the near future. HINT: The monitor result might on rare occasions be Pass even if the Malfunction Indicator Lamp (MIL) is illuminated. This indicates the system malfunctioned on a previous driving cycle. This might be caused by an intermittent problem.
3. MONITOR RESULT INFORMATION When using a generic scan tool, multiply the test value by the scaling value. Refer to "Monitor Result" in each DTC related to the monitor. Refer to «DIAGNOSTIC TROUBLE CODE CHART [07/2013 - 12/2013]»(ref-612245-S04086921262014042900000) . Advance / Retarded Intake Side (for Bank 1) Monitor ID Test ID Scaling Unit Description $35 $8B Multiply by 0.5 °CA VVT slow response (Advance) $35 $8C Multiply by 0.5 °CA VVT slow response (Retarded) $35 $D3 Multiply by 0.5 °CA VVT system diagnosis (Abnormal deviation during target mid-lock request) $35 $D5 Multiply by 0.5 °CA VVT system diagnosis (Abnormal deviation of target) Advance / Retarded Intake Side (for Bank 2) Monitor ID Test ID Scaling Unit Description $36 $8B Multiply by 0.5 °CA VVT slow response (Advance) $36 $8C Multiply by 0.5 °CA VVT slow response (Retarded) $36 $D3 Multiply by 0.5 °CA VVT system diagnosis (Abnormal deviation during target mid-lock request) $36 $D5 Multiply by 0.5 °CA VVT system diagnosis (Abnormal deviation of target) Advance / Retarded Exhaust Side (for Bank 1) Monitor ID Test ID Scaling Unit Description $35 $8E Multiply by 0.5 °CA VVT slow response (Advance) $35 $8D Multiply by 0.5 °CA VVT slow response (Retarded) $35 $D6 Multiply by 0.5 °CA VVT system diagnosis (Abnormal deviation of target) Advance / Retarded Exhaust Side (for Bank 2) Monitor ID Test ID Scaling Unit Description $36 $8E Multiply by 0.5 °CA VVT slow response (Advance) $36 $8D Multiply by 0.5 °CA VVT slow response (Retarded) $36 $D6 Multiply by 0.5 °CA VVT system diagnosis (Abnormal deviation of target) A/F Sensor Bank 1 Sensor 1 Monitor ID Test ID Scaling Unit Description $01 $84 Multiply by 0.0000305 No dimension A/F sensor minimum value $01 $85 Multiply by 0.0000305 No dimension A/F sensor maximum value $01 $CF Multiply by 0.0039062 No dimension A/F sensor fluctuation (Width) $01 $CD Multiply by 0.0039062 No dimension A/F sensor fluctuation (Time) $01 $91 Multiply by 0.0039062 No dimension Rich to lean delay level $01 $92 Multiply by 1 ms Rich / lean time ratio $01 $A3 Multiply by 0.0039062 No dimension Lean to rich delay level $01 $A4 Multiply by 1 ms Lean / rich time ratio $01 $AC Multiply by 1 ms Waiting time for rich side $01 $AD Multiply by 1 ms Rich / lean time difference $01 $AE Multiply by 1 ms Waiting time for lean side $01 $AF Multiply by 1 ms Lean / rich time difference HO2 Sensor Bank 1 Sensor 2 Monitor ID Test ID Scaling Unit Description $02 $05 Multiply by 1 ms Rich to lean sensor threshold time (calculated) $02 $06 Multiply by 1 ms Lean to rich sensor threshold time (calculated) $02 $07 Multiply by 0.001 V Minimum sensor voltage for test cycle (calculation) $02 $08 Multiply by 0.001 V Maximum sensor voltage for test cycle (calculation) $02 $D1 Multiply by 1 ms Rich to Lean delayed response $02 $D2 Multiply by 1 No dimension Lean to Rich delayed response Catalyst Monitor ID Test ID Scaling Unit Description $21 $89 Multiply by 0.0039062 Ratio Oxygen storage capacity of catalyst EVAP Monitor (0.020") Monitor ID Test ID Scaling Unit Description $3C $C1 Multiply by 0.25 Pa Mode 4-1 test result $3C $C2 Multiply by 0.25 Pa Mode 4-2 test result $3C $C3 Multiply by 0.25 Pa Mode 5 test result $3C $C4 Multiply by 0.25 Pa Mode 7 test result $3C $C5 Multiply by 0.25 Pa Mode 8 test result $3C $C6 Multiply by 10 ms Mode 9 test result $3C $C7 Multiply by 0.25 Pa Mode 13 test result $3C $C8 Multiply by 0.25 Pa Mode 15-1 test result $3C $C9 Multiply by 0.25 Pa Mode 15-2 test result $3C $CA Multiply by 0.25 Pa Mode 16 test result Purge Flow Monitor Monitor ID Test ID Scaling Unit Description $3D $CB Multiply by 10 ms Test 1 result $3D $CC Multiply by 0.25 Pa Test 2 result A/F Sensor Heater Bank 1 Sensor 1 Monitor ID Test ID Scaling Unit Description $41 $9B Multiply by 1 ohms Oxygen sensor heater impedance Oxygen Sensor Heater Bank 1 Sensor 2 Monitor ID Test ID Scaling Unit Description $42 $A2 Multiply by 1 Time A/F sensor heater test result Misfire Monitor ID Test ID Scaling Unit Description $A1 $0B Multiply by 1 Time Total EWMA* misfire count of all cylinders in last ten driving cycles $A1 $0C Multiply by 1 Time When ignition switch ON, total misfire count of all cylinders in last driving cycle is displayed. While engine is running, total misfire count of all cylinders in current driving cycle is displayed. $A2 $0B Multiply by 1 Time Total EWMA* misfire count of cylinder 1 in last ten driving cycles $A2 $0C Multiply by 1 Time When ignition switch ON, total misfire count of cylinder 1 in last driving cycle is displayed. While engine is running, total misfire count of cylinder 1 in current driving cycle is displayed. $A3 $0B Multiply by 1 Time Total EWMA* misfire count of cylinder 2 in last ten driving cycles $A3 $0C Multiply by 1 Time When ignition switch ON, total misfire count of cylinder 2 in last driving cycle is displayed. While engine is running, total misfire count of cylinder 2 in current driving cycle is displayed. $A4 $0B Multiply by 1 Time Total EWMA* misfire count of cylinder 3 in last ten driving cycles $A4 $0C Multiply by 1 Time When ignition switch ON, total misfire count of cylinder 3 in last driving cycle is displayed. While engine is running, total misfire count of cylinder 3 in current driving cycle is displayed. $A5 $0B Multiply by 1 Time Total EWMA* misfire count of cylinder 4 in last ten driving cycles $A5 $0C Multiply by 1 Time When ignition switch ON, total misfire count of cylinder 4 in last driving cycle is displayed. While engine is running, total misfire count of cylinder 4 in current driving cycle is displayed. HINT: *: EWMA (Exponential Weighted Moving Average) misfire counts for last 10 driving cycles (calculated) Calculation: 0.1 x (current counts) + 0.9 x (previous average) Initial value for (previous average) = 0

CHECKING MONITOR STATUS [12/2013 - ]

The purpose of the monitor result (mode 06) is to allow access to the results of on-board diagnostic monitoring tests of specific components/systems that are not continuously monitored. Examples are catalysts and evaporative emissions (EVAP) systems.

The monitor result allows the OBD II scan tool to display the monitor status, test value, minimum test limit and maximum test limit. These data are displayed after the vehicle has been driven to run the monitor.

When the test value is not between the minimum and maximum test limits, the ECM (PCM) interprets this as a malfunction. If the test value is on the borderline of the test limits, the component is likely to malfunction in the near future.

Perform the following procedures to view the monitor status. Although these procedures refer to the Lexus/Toyota Techstream, the monitor status can be checked using a generic OBD II scan tool. Refer to your scan tool operator's manual for specific procedural information.

1. ACCESS MONITOR RESULT Enter the following menus: Generic OBD II. Confirm the monitor status for each component. HINT: The monitor status for each component is displayed in the Result column. Pass: The component is functioning normally. Fail: The component is malfunctioning. Display the test results and test values for a monitor by selecting the icon in the Details column for that monitor.
2. CHECK COMPONENT STATUS Compare the test value with the minimum test limit (Min Limit) and maximum test limit (Max Limit). If the test value is between the minimum and maximum test limits, the component is functioning normally. If not, the component is malfunctioning. The test value is usually not near the test limits. If the test value is on the borderline of the test limits, the component is likely to malfunction in the near future. HINT: The monitor result might on rare occasions be Pass even if the Malfunction Indicator Lamp (MIL) is illuminated. This indicates the system malfunctioned on a previous driving cycle. This might be caused by an intermittent problem.
3. MONITOR RESULT INFORMATION When using a generic scan tool, multiply the test value by the scaling value. Refer to "Monitor Result" in each DTC related to the monitor. Refer to «DIAGNOSTIC TROUBLE CODE CHART [12/2013 - ]»(ref-612245-S22758347072014042900000) . Advance / Retarded Intake Side (for Bank 1) Monitor ID Test ID Scaling Unit Description $35 $8B Multiply by 0.5 °CA VVT slow response (Advance) $35 $8C Multiply by 0.5 °CA VVT slow response (Retarded) Advance / Retarded Intake Side (for Bank 2) Monitor ID Test ID Scaling Unit Description $36 $8B Multiply by 0.5 °CA VVT slow response (Advance) $36 $8C Multiply by 0.5 °CA VVT slow response (Retarded) Advance / Retarded Exhaust Side (for Bank 1) Monitor ID Test ID Scaling Unit Description $35 $8E Multiply by 0.5 °CA VVT slow response (Advance) $35 $8D Multiply by 0.5 °CA VVT slow response (Retarded) Advance / Retarded Exhaust Side (for Bank 2) Monitor ID Test ID Scaling Unit Description $36 $8E Multiply by 0.5 °CA VVT slow response (Advance) $36 $8D Multiply by 0.5 °CA VVT slow response (Retarded) A/F Sensor Bank 1 Sensor 1 Monitor ID Test ID Scaling Unit Description $01 $84 Multiply by 0.0000305 No dimension A/F sensor minimum value $01 $85 Multiply by 0.0000305 No dimension A/F sensor maximum value $01 $86 Multiply by 0.0039062 No dimension A/F sensor response $01 $CF Multiply by 0.0039062 No dimension A/F sensor fluctuation (Width) $01 $CD Multiply by 0.0039062 No dimension A/F sensor fluctuation (Time) $01 $91 Multiply by 0.0039062 No dimension Rich to lean delay level $01 $92 Multiply by 1 ms Rich / lean time ratio $01 $A3 Multiply by 0.0039062 No dimension Lean to rich delay level $01 $A4 Multiply by 1 ms Lean / rich time ratio $01 $AC Multiply by 1 ms Waiting time for rich side $01 $AD Multiply by 1 ms Rich / lean time difference $01 $AE Multiply by 1 ms Waiting time for lean side $01 $AF Multiply by 1 ms Lean / rich time difference HO2 Sensor Bank 1 Sensor 2 Monitor ID Test ID Scaling Unit Description $02 $05 Multiply by 1 ms Rich to lean sensor threshold time (calculated) $02 $06 Multiply by 1 ms Lean to rich sensor threshold time (calculated) $02 $07 Multiply by 0.001 V Minimum sensor voltage for test cycle (calculation) $02 $08 Multiply by 0.001 V Maximum sensor voltage for test cycle (calculation) Catalyst Monitor ID Test ID Scaling Unit Description $21 $89 Multiply by 0.0039062 Ratio Oxygen storage capacity of catalyst EVAP Monitor (Cap Off) Monitor ID Test ID Scaling Unit Description $39 $93 Multiply by 0.25 Pa Mode B test result EVAP Monitor (0.040") Monitor ID Test ID Scaling Unit Description $3B $94 Multiply by 0.25 Pa Mode C test result $3B $95 Multiply by 0.25 Pa Mode D test result EVAP Monitor (0.020") Monitor ID Test ID Scaling Unit Description $3C $96 Multiply by 0.25 Pa Mode D test result $3C $C1 Multiply by 0.25 Pa Mode 4-1 test result $3C $C2 Multiply by 0.25 Pa Mode 4-2 test result $3C $C3 Multiply by 0.25 Pa Mode 5 test result $3C $C4 Multiply by 0.25 Pa Mode 7 test result $3C $C5 Multiply by 0.25 Pa Mode 8 test result $3C $C6 Multiply by 10 ms Mode 9 test result $3C $C7 Multiply by 0.25 Pa Mode 13 test result $3C $C8 Multiply by 0.25 Pa Mode 15-1 test result $3C $C9 Multiply by 0.25 Pa Mode 15-2 test result $3C $CA Multiply by 0.25 Pa Mode 16 test result Purge Flow Monitor Monitor ID Test ID Scaling Unit Description $3D $98 Multiply by 0.25 Pa 0.04" mode Z test result $3D $CB Multiply by 10 ms Test 1 result $3D $CC Multiply by 0.25 Pa Test 2 result A/F Sensor Heater Bank 1 Sensor 1 Monitor ID Test ID Scaling Unit Description $41 $9B Multiply by 1 ohms Oxygen sensor heater impedance Oxygen Sensor Heater Bank 1 Sensor 2 Monitor ID Test ID Scaling Unit Description $42 $A2 Multiply by 1 Time A/F sensor heater test result Misfire Monitor ID Test ID Scaling Unit Description $A1 $0B Multiply by 1 Time Total EWMA* misfire count of all cylinders in last ten driving cycles $A1 $0C Multiply by 1 Time When ignition switch ON, total misfire count of all cylinders in last driving cycle is displayed. While engine is running, total misfire count of all cylinders in current driving cycle is displayed. $A2 $0B Multiply by 1 Time Total EWMA* misfire count of cylinder 1 in last ten driving cycles $A2 $0C Multiply by 1 Time When ignition switch ON, total misfire count of cylinder 1 in last driving cycle is displayed. While engine is running, total misfire count of cylinder 1 in current driving cycle is displayed. $A3 $0B Multiply by 1 Time Total EWMA* misfire count of cylinder 2 in last ten driving cycles $A3 $0C Multiply by 1 Time When ignition switch ON, total misfire count of cylinder 2 in last driving cycle is displayed. While engine is running, total misfire count of cylinder 2 in current driving cycle is displayed. $A4 $0B Multiply by 1 Time Total EWMA* misfire count of cylinder 3 in last ten driving cycles $A4 $0C Multiply by 1 Time When ignition switch ON, total misfire count of cylinder 3 in last driving cycle is displayed. While engine is running, total misfire count of cylinder 3 in current driving cycle is displayed. $A5 $0B Multiply by 1 Time Total EWMA* misfire count of cylinder 4 in last ten driving cycles $A5 $0C Multiply by 1 Time When ignition switch ON, total misfire count of cylinder 4 in last driving cycle is displayed. While engine is running, total misfire count of cylinder 4 in current driving cycle is displayed. HINT: *: EWMA (Exponential Weighted Moving Average) misfire counts for last 10 driving cycles (calculated) Calculation: 0.1 x (current counts) + 0.9 x (previous average) Initial value for (previous average) = 0

TERMINALS OF ECM [12/2013 - ]

HINT

The standard 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 voltage for that pair of the terminals, and displayed in the "Specified Condition" column. The illustration above can be used as a reference to identify the ECM terminal locations.

1. *1: for Automatic Transmission
2. *2: for Manual Transmission
3. *3: w/ Smart Key System
4. *4: w/o Smart Key System
5. *5: w/ ID Code Box
6. *6: w/o ID Code Box

1. WAVEFORM 1 CAN COMMUNICATION SIGNAL ECM Terminal Name Between CANL and E01 Tester Range 1 V/DIV., 10 μs./DIV. Condition Ignition switch ON HINT: The waveform varies depending on the CAN communication signal.
2. WAVEFORM 2 CAN COMMUNICATION SIGNAL ECM Terminal Name Between CANH and E01 Tester Range 1 V/DIV., 10 μs./DIV. Condition Ignition switch ON HINT: The waveform varies depending on the CAN communication signal.
3. WAVEFORM 3 AIR FUEL RATIO SENSOR HEATER ECM Terminal Name Between HA1A and E01 Tester Range 5 V/DIV., 50 ms./DIV. Condition Idling with cold engine
4. WAVEFORM 4 INJECTOR FOR DIRECT INJECTION NO. 1 (TO NO. 4) INJECTION SIGNAL ECM Terminal Name CH1: Between #1 (to #4) and E01 CH2: Between IJF1or IJF2 and E01 Tester Range 2 V/DIV., 40 μs./DIV. Condition Idling with warm engine HINT: The wavelength becomes shorter as the engine speed increases.
5. WAVEFORM 5 FUEL PUMP FOR HIGH PRESSURE (SPILL VALVE) ECM Terminal Name CH1: Between FPD and E01 CH2: Between FPF and E01 Tester Range 2 V/DIV., 20 ms./DIV. Condition Idling with warm engine
6. WAVEFORM 6 CRANKSHAFT POSITION SENSOR AND VVT SENSOR FOR EXHAUST CAMSHAFT ECM Terminal Name CH1: Between NE+ and NE- CH2: Between EV1+ and E01 CH3: Between EV2+ and E01 Tester Range 5 V/DIV., 10 ms./DIV. Condition Idling with warm engine HINT: The wavelength becomes shorter as the engine speed increases.
7. WAVEFORM 7 CRANKSHAFT POSITION SENSOR AND VVT SENSOR FOR INTAKE CAMSHAFT ECM Terminal Name CH1: Between NE+ and NE- CH2: Between VV1+ and E01 CH3: Between VV2+ and E01 Tester Range 5 V/DIV., 10 ms./DIV. Condition Idling with warm engine HINT: The wavelength becomes shorter as the engine speed increases.
8. WAVEFORM 8 ENGINE SPEED SIGNAL ECM Terminal Name Between TACH and E01 Tester Range 5 V/DIV., 10 ms./DIV. Condition Engine speed maintained at 1500 rpm HINT: The wavelength becomes shorter as the vehicle speed increases.
9. WAVEFORM 9 FUEL PUMP CONTROL ECM Terminal Name Between FPC and E01 Tester Range 5 V/DIV., 5 ms./DIV. Condition Ignition switch ON
10. WAVEFORM 10 THROTTLE ACTUATOR ECM Terminal Name CH1: Between M+ and E01 CH1: Between M- and E01 Tester Range CH1: 5 V/DIV., 500 μs./DIV. CH2: 200 mV/DIV., 500 μs./DIV. Condition Idling with warm engine
11. WAVEFORM 11 CAMSHAFT TIMING OIL CONTROL VALVE (OCV) ECM Terminal Name Between OC1, OC2, OE1 or OE2 and E01 Tester Range 5 V/DIV., 1 ms./DIV. Condition Idling with warm engine
12. WAVEFORM 12 HEATED OXYGEN SENSOR ECM Terminal Name Between HT1B and E01 Tester Range 5 V/DIV., 50 ms./DIV. Condition Idling with cold engine
13. WAVEFORM 13 IGNITION COIL (IGNITION SIGNAL) ECM Terminal Name Between IGT (1 to 4) and E01 Tester Range 2 V/DIV., 20 ms./DIV. Condition Idling with warm engine
14. WAVEFORM 14 PURGE VALVE ECM Terminal Name Between PRG and E01 Tester Range 10 V/DIV., 2 s./DIV. Condition One of the following conditions is met: Ignition switch ON Idling with warm engine, under purge control
15. WAVEFORM 15 INJECTOR FOR PORT INJECTION NO. 1 (TO NO. 4) INJECTION SIGNAL ECM Terminal Name Between # (10 to 40) 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.

Scheme 37

1. DESCRIPTION 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. 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. 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. 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.
2. 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 (Techstream only).
3. 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 next subsequent drive cycle, the MIL is illuminated (2nd trip).
4. DLC3 (Data Link Connector 3) Check the DLC3. Refer to «GENERAL INFORMATION [07/2013 - ]»(ref-612229-S35930398492014042900000) .
5. 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 moving or stationary, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data stored at the time of a malfunction.
6. BATTERY VOLTAGE Standard voltage 11 to 14 V If voltage is below 11 V, replace or recharge the battery.
7. MIL (Malfunction Indicator Lamp) The MIL is illuminated when the ignition switch is first turned to ON (the engine is not running). The MIL turns 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 is not illuminated when the ignition switch is first turned to ON, check the MIL circuit. Refer to «MIL Circuit»(ref-612367-S25918407052014042900000) .
8. 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 simulating 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 DTCs. Refer to «DTC CHECK / CLEAR [07/2013 - ]»(ref-612245-S39444024262014042900000) . Turn the ignition switch off and wait for at least 30 seconds. Turn the ignition switch to ON and turn the Techstream on. 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 DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

CHECK MODE PROCEDURE [07/2013 - ]

HINT

Compared to normal mode, check mode is more sensitive to malfunctions. Therefore, check mode can detect malfunctions that cannot be detected in normal mode.

Note. All the stored DTCs and freeze frame data are cleared if: 1) the ECM is changed from normal mode to check mode or vice versa; or 2) the ignition switch is turned from ON to ACC or off while in check mode. Before changing modes, always check and note any DTCs and freeze frame data.

Scheme 38

1. CHECK MODE PROCEDURE Check and ensure the following conditions: Battery voltage is 11 V or higher. Throttle valve is fully closed. Shift lever is in P, N or neutral. A/C switch is off. Turn the ignition switch off. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Utility / Check Mode. Switch the ECM from normal mode to check mode. Check that the MIL flashes as shown in the illustration. Start the engine. Check that the MIL turns off. Simulate the conditions of the malfunction described by the customer. Check DTCs and freeze frame data using the Techstream.

FAIL-SAFE CHART [07/2013 - ]

If any of the following DTCs are stored, the ECM enters fail-safe mode to allow the vehicle to be driven temporarily or stops fuel injection.