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Engine Control System (Diagnostic Codes (P0604 - U0293) & Circuit Tests): Diagnosis Lexus GS IV

Testing & Diagnostics 7 illustrations ~9582 words

INSPECTION PROCEDURE

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

Note. There is a possibility that the DTC P062F is issued from the ECUs of the ECM and power management control ECU. Use Techstream to conduct a health check to confirm which ECU the DTC is issued from and then inspect the related system.

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

HINT

  1. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
  2. Refer to "Data List / Active Test" [Vapor Pressure Pump and MAP]. Refer to «DATA LIST / ACTIVE TEST [03/2012 - ]»(ref-600436-S18321174072014022400000) .

HINT

  1. If other DTCs are output, perform troubleshooting for the relevant DTCs first.
  2. The following troubleshooting procedure is an example of one method, as DTC P122E is different than conventional troubleshooting DTCs.
  3. DTC P122E differs from conventional troubleshooting DTCs for parts, circuits and systems. This DTC is used to determine the malfunctioning part from the malfunction symptoms and freeze frame data when the customer mentions driveability problems when the fuel pressure is high. Even if a DTC is output, when there is no mention of a problem from the customer, do not perform any procedures, clear the DTCs and return the vehicle to the customer, as this DTC may be output due to the way the vehicle was operated by the customer.
  4. If the customer mentions driveability problems, replace the fuel pump (for high pressure).

HINT

  1. If other DTCs are output, perform troubleshooting for the relevant DTCs first.
  2. The following troubleshooting procedure is an example of one method, as DTC P122F is different than conventional troubleshooting DTCs.
  3. DTC P122F differs from conventional troubleshooting DTCs for parts, circuits and systems. This DTC is used to determine the malfunctioning part from the malfunction symptoms and freeze frame data when the customer mentions driveability problems when starting the engine after the engine was hot. Even if a DTC is output, when there is no mention of a problem from the customer, do not perform any procedures, clear the DTCs and return the vehicle to the customer, as this DTC may be output due to the way the vehicle was operated by the customer.

HINT

  1. If the current from the INJ relay is cut because DTC P062D is stored, DTC P1235 will be stored even if the fuel pump for high pressure is normal.
  2. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

HINT

  1. In contrast to normal malfunction diagnosis for components, circuits and systems, DTC P1604 is used to determine the malfunctioning area from the problem symptoms and freeze frame data when the user mentions problems such as starting difficulty. As these DTCs can be stored as a result of certain user actions, even if these DTCs are output, if the customer makes no mention of problems, clear these DTCs without performing any troubleshooting and return the vehicle to the customer.
  2. If any DTCs other than P1604 are output, troubleshoot those DTCs first.
  3. Since DTC P1604 is different from other DTCs, the following procedure is shown as a reference.
  4. Read freeze frame data using the Techstream. Freeze frame data records engine conditions when a malfunction occurs. This information can be useful when troubleshooting.
  5. When confirming the freeze frame data, be sure to check all 5 sets of freeze frame data. Refer to «FREEZE FRAME DATA [03/2012 - ]»(ref-600436-S42043071792014022400000) .
  6. When confirming freeze frame data, if there are multiple items related to the cause of the malfunction, perform troubleshooting for all related items.
  7. Try to start the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and compare it with the freeze frame data.
  8. If the malfunction does not reoccur, carefully check the vehicle conditions from when the malfunction occurred using freeze frame data.
  9. When performing inspections, jiggle the relevant wire harnesses and connectors in an attempt to reproduce malfunctions that do not always occur.
  10. If the same inspection or replacement procedure appears 2 times when performing an inspection procedure, it is not necessary to repeat the procedure the second time.

HINT

  1. In contrast to normal malfunction diagnosis for components, circuit and systems, DTC P1605 is used to determine the malfunctioning area from the problem symptoms and freeze frame data when the user mentions problems such as rough idling. As these DTCs can be stored as a result of certain user actions, even if these DTCs are output, if the customer makes no mention of problems, clear these DTCs without performing any troubleshooting and return the vehicle to the customer.
  2. If any DTCs other than P1605 are output, troubleshoot those DTCs first.
  3. Since DTC P1605 is different from other DTCs, the following procedure is shown as a reference.
  4. Read freeze frame data using the Techstream. Freeze frame data records engine conditions when a malfunction occurs. This information can be useful when troubleshooting.
  5. When confirming the freeze frame data, be sure to check all 5 sets of freeze frame data. Refer to «FREEZE FRAME DATA [03/2012 - ]»(ref-600436-S42043071792014022400000) .
  6. When confirming freeze frame data, if there are multiple items related to the cause of the malfunction, perform troubleshooting for all related items.
  7. Try to operate the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up and no load) and compare these data with the freeze frame data.
  8. Inspections take into account the fact that the malfunction may not have reoccurred and place emphasis on checking the vehicle conditions present at the time when the malfunction occurred.
  9. When performing inspections, jiggle the relevant wire harnesses and connectors in an attempt to reproduce malfunctions that do not always occur.

HINT

  1. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
  2. The throttle actuator current (Throttle Motor Current) and the throttle actuator duty ratio (Throttle Motor Duty (Open) / Throttle Motor Duty (Close)) can be read using the Techstream. However, the ECM shuts off the throttle actuator current when the electronic throttle control system malfunctions.

HINT

  1. Read freeze frame data using the Techstream. Freeze frame data records engine conditions when a malfunction occurs. This information can be useful when troubleshooting.
  1. Since a pending DTC is not stored for this DTC, it takes time to confirm whether the malfunction has been successfully repaired by checking for this DTC. When confirming whether the malfunction has been successfully repaired, compare "ISC Learning Value" recorded in the freeze frame data with "ISC Learning Value" in the Data List after repairs have been made to save time.

Scheme 58

Scheme 58: PROCEDURE
Scheme 58: PROCEDURE
  1. CHECK FOR ANY OTHER DTCS OUTPUT (IN ADDITION TO P2109) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. RESULT Result Proceed to Only DTC P2109 is output A DTC P2109 and other DTCs are output B HINT: If any DTCs other than P2109 are output, troubleshoot those DTCs first. B --> See step 6 A: Go to next step
  2. CHECK FREEZE FRAME DATA Connect the Techstream to the DLC3. Turn the power switch on (IG). Using the Techstream, check "ISC Learning Value" in the freeze frame data. Refer to «FREEZE FRAME DATA [03/2012 - ]»(ref-600436-S42043071792014022400000) . HINT: Be sure to check "ISC Learning Value" in the freeze frame data as it is used when confirming whether the malfunction has been successfully repaired. NEXT: Go to next step
  3. REMOVE FOREIGN OBJECT (CLEAN THROTTLE BODY WITH MOTOR ASSEMBLY) Clean off any deposits from the inside of the throttle body with motor assembly. Push open the throttle valve and wipe off any carbon from the valve and bore using a cloth soaked in non-residue solvent. WARNING: Make sure that the cloth or your fingers do not get caught in the valve. NOTE: Make sure that foreign matter does not enter the throttle body with motor assembly. Do not directly apply non-residue solvent to the throttle body with motor assembly or wash the throttle body with motor assembly. Cleaning solvent may leak into the motor from the shaft and cause problems such as rust or valve movement problems. If there is coating material on the edge of the valve, be careful not to remove it. Push the throttle valve open gently with your finger and check that the throttle valve moves smoothly. HINT: If the throttle valve does not open smoothly, replace the throttle body with motor assembly. NEXT: Go to next step
  4. READ VALUE USING TECHSTREAM (ISC LEARNING VALUE) Perform "Inspection After Repair" after cleaning or replacing the throttle with motor body assembly. Refer to «INITIALIZATION [03/2012 - ]»(ref-600436-S34722863312014022400000) . Enter the following menus: Powertrain / Engine and ECT / Data List / ISC Learning Value. Read the value. OK The value is half of "ISC Learning Value" recorded in the freeze frame data or less. HINT: Perform "Inspection After Repair" after replacing the throttle body with motor assembly. Refer to «INITIALIZATION [03/2012 - ]»(ref-600436-S34722863312014022400000) . NG --> See step 5 OK --> END
  5. REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY. Refer to «REMOVAL [03/2012 - ]»(ref-600565-S21240872952014022400000)
  6. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART [03/2012 - ]»(ref-600436-S04366444592014022400000)

HINT

  1. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
  2. Refer to "Data List / Active Test" [Throttle Position Command, Throttle Position No. 1, Throttle Motor Current, Throttle Motor Duty (Open), Throttle Motor Duty (Close)]. Refer to «DATA LIST / ACTIVE TEST [03/2012 - ]»(ref-600436-S18321174072014022400000) .

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

HINT

  1. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
  2. Refer to "Data List / Active Test" [Throttle Position Commanded, Throttle Position No. 1, Throttle Motor Current, Throttle Motor Duty (Open) and Throttle Motor Duty (Close)]. Refer to «DATA LIST / ACTIVE TEST [03/2012 - ]»(ref-600436-S18321174072014022400000) .

HINT

  1. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from transmission.
  2. Bank 2 refers to the bank that does not include the No. 1 cylinder.
  3. Sensor 1 refers to the sensor closest to the engine assembly.
  4. Sensor 2 refers to the sensor farthest away from the engine assembly.
  5. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
  6. A low air fuel ratio sensor voltage could be caused by a rich air fuel mixture. Check for conditions that would cause the engine to run rich.
  7. A high air fuel ratio sensor voltage could be caused by a lean air fuel mixture. Check for conditions that would cause the engine to run lean.

HINT

  1. Refer to "Data List / Active Test" [AFS Voltage B1S1 and AFS Voltage B2S1]. Refer to «DATA LIST / ACTIVE TEST [03/2012 - ]»(ref-600436-S18321174072014022400000) .
  2. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
  3. Bank 2 refers to the bank that does not include the No. 1 cylinder.
  4. Sensor 1 refers to the sensor closest to the engine assembly.
  5. Sensor 2 refers to the sensor farthest away from the engine assembly.
  6. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

DTC SUMMARY

DTC No.Monitoring ItemDTC Detection ConditionTrouble AreaDetection TimingDetection Logic
P2420Vent valve stuck open (vent)Following condition met during key-off EVAP monitor: EVAP pressure change when vent valve is closed (on) less than 0.3 kPa(gauge) [2.25 mmHg(gauge)]Canister pump module (reference orifice, leak detection pump, vent valve) Connector/wire harness (Canister pump module - ECM) Canister (filter inside canister clogged) ECMPower switch off2 trips

HINT

The vent valve is built into the canister pump module.

Refer to the EVAP System. Refer to INSPECTION PROCEDURE .

DTC No.Monitoring ItemMalfunction Detection ConditionTrouble AreaDetection TimingDetection Logic
P2610Soak timer (built into ECM)ECM internal malfunctionECMEngine running2 trip

HINT

  1. DTC P2610 is set if an internal ECM problem is detected. Diagnostic procedures are not required. ECM replacement is required.
  2. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

HINT

  1. Repeating this inspection for symptom confirmation may cause the SOC to drop, preventing the system from entering the READY-on state. In this case, use the THS charger to charge the HV battery.
  2. Cranking the engine once causes the SOC to drop approximately 1%.
  3. Charging the HV battery once (10 minutes) using the THS charger restores the SOC approximately 2%.
  4. Charging the HV battery using the THS charger takes approximately 10 minutes when the HV battery temperature is 25°C (77°F) or approximately 30 minutes when the HV battery temperature is 0°C (32°F).
  5. The THS charger is a supplemental charging device that charges the HV battery enough to enable the engine to start (the vehicle can enter the READY-on state).
  6. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

Refer to the CAN Communication System. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ] .

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure. The Techstream is required to conduct the following diagnostic troubleshooting procedure.

HINT

  1. Using the Techstream monitor results enables the EVAP (Evaporative Emission) system to be confirmed.
  2. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

Scheme 59

Scheme 59: PROCEDURE
Scheme 59: PROCEDURE

Scheme 60

Scheme 60
Scheme 60

Scheme 61

Scheme 61
Scheme 61

Scheme 62

Scheme 62
Scheme 62

Scheme 63

Scheme 63
Scheme 63
  1. CONFIRM DTC Turn the power switch off and wait for 10 seconds. Turn the power switch on (IG). Turn the power switch off and wait for 10 seconds. Connect the Techstream to the DLC3. Turn the power switch on (IG) and turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Confirm DTCs and freeze frame data. If any EVAP system DTCs are stored, the malfunctioning area can be determined using the table below. NOTE: If the reference pressure difference between the first and second checks is more than the specification, all the DTCs relating to the reference pressure (P043E, P043F, P2401, P2402 and P2419) are stored. NEXT: Go to next step
  2. PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE) NOTE: The Evaporative System Check (Automatic Mode) consists of 6 steps performed automatically by the Techstream. It takes a maximum of approximately 24 minutes. Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable. Do not run the engine during this operation. When the temperature of the fuel is 35°C (95°F) or higher, a large amount of vapor forms and any check results become inaccurate. When performing the Evaporative System Check, keep the temperature below 35°C (95°F). Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600436-S38423165432014022400000) . Enter the following menus: Powertrain / Engine and ECT / Utility / Evaporative System Check / Automatic Mode. After the EVAP SYSTEM CHECK is completed, check for pending DTCs by entering the following menus: Powertrain / Engine and ECT / Trouble Codes. HINT: If no pending DTCs are displayed, perform the Confirmation Driving Pattern. After this confirmation, check for pending DTCs. If no DTCs are displayed, the EVAP system is normal. NEXT: Go to next step
  3. PERFORM EVAP SYSTEM CHECK (MANUAL MODE) NOTE: In the Evaporative System Check (Manual Mode), the series of 6 Evaporative System Check steps are performed manually using the Techstream. Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable. Do not run the engine during this operation. When the temperature of the fuel is 35°C (95°F) or higher, a large amount of vapor forms and any check results become inaccurate. When performing the Evaporative System Check, keep the temperature below 35°C (95°F). Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600436-S38423165432014022400000) . Enter the following menus: Powertrain / Engine and ECT / Utility / Evaporative System Check / Manual Mode. NEXT: Go to next step
  4. PERFORM EVAP SYSTEM CHECK (STEP 1/6) Check the EVAP pressure in step 1/6. RESULT DTC *1 Result Suspected Trouble Area Proceed to - Virtually no variation in EVAP pressure Not yet determined A P0451 EVAP pressure fluctuates by +/-0.3 kPa(gauge) [2.25 mmHg(gauge)] or more Canister pressure sensor signal noise B (P0452 or P0453) *2 EVAP pressure is below 42.11 kPa(abs) [315.85 mmHg(abs)] or 123.761 kPa(abs) [928.28 mmHg(abs)] or more EVAP pressure deviates +/-10 kPa [+/-75 mmHg] from actual atmosphere pressure *3 Canister pressure sensor or its circuit has malfunction C *1: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above. *2: If the canister pressure sensor circuit has an open or short, DTC P0452 or P0453 is stored 0.5 seconds after the power switch is turned to ON. HINT: *3: Canister pressure sensor standard output range is 70 to 110 kPa(abs) [525 to 825 mmHg(abs)]. This varies by weather. B --> See step 38 C --> See step 12 A: Go to next step
  5. PERFORM EVAP SYSTEM CHECK (STEP 1/6 TO 2/6) Check the EVAP pressure in steps 1/6 and 2/6. RESULT DTC* Result Suspected Trouble Area Proceed to - Virtually no variation in EVAP pressure during step 1/6. Then decreases to reference pressure Not yet determined A P2402 Small difference between EVAP pressures during steps 1/6 and 2/6 Leak detection pump stuck ON B *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above. HINT: The first reference pressure is the value determined in step 2/6. B --> See step 33 A: Go to next step
  6. PERFORM EVAP SYSTEM CHECK (STEP 2/6) HINT: Make a note of the pressures checked in inspection items (A) and (B) below. Check the EVAP pressure 4 seconds after the leak detection pump is activated*1 (A). *1: The leak detection pump begins to operate as step 1/6 finishes and step 2/6 starts. Check the EVAP pressure again when it has stabilized. This pressure is the reference pressure (B). RESULT DTC*2 Result Suspected Trouble Area Proceed to - EVAP pressure in inspection item (B) is between -4.85 kPa(gauge) and -1.057 kPa(gauge) [-36.381 mmHg(gauge) and -7.929 mmHg(gauge)] Not yet determined A P043F and P2401 EVAP pressure in inspection item (B) is -1.057 kPa(gauge) [-7.929 mmHg(gauge)] or more Reference orifice high-flow Leak detection pump stuck OFF B P043E EVAP pressure in inspection item (B) is less than -4.85 kPa(gauge) [-36.384 mmHg(gauge)] Reference orifice clogged C P2419 EVAP pressure in inspection item (A) is more than -0.25 kPa(gauge) [-1.875 mmHg(gauge)] Vent valve stuck closed Leak detection pump performance deteriorates Leak detection pump circuit malfunctioning (large resistance exists in the circuit) D *2: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above. B --> See step 11 C --> See step 38 D --> See step 13 A: Go to next step
  7. PERFORM EVAP SYSTEM CHECK (STEP 2/6 TO 3/6) Check the EVAP pressure in step 3/6. RESULT DTC* Result Suspected Trouble Area Proceed to - EVAP pressure increases by 0.3 kPa(gauge) [2.25 mmHg(gauge)] or more within 10 seconds of proceeding from step 2/6 to step 3/6 Not yet determined A P2420 No variation in EVAP pressure even after proceeding from step 2/6 to step 3/6 Vent valve stuck open (vent) Canister (charcoal filter inside canister) clogged B P0451 No variation in EVAP pressure during steps 1/6 through 3/6 Canister pressure sensor output value stuck Vent valve broken (valve split in two) Leak detection pump performance deteriorates Leak detection pump circuit malfunctioning (large resistance exists in the circuit) C *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above. B --> See step 27 C --> See step 15 A: Go to next step
  8. PERFORM EVAP SYSTEM CHECK (STEP 3/6) Wait until the EVAP pressure change is less than 0.1 kPa(gauge) [0.75 mmHg(gauge)] for 30 seconds. Measure the EVAP pressure and record it. HINT: A few minutes are required for the EVAP pressure to become saturated. When there is little fuel in the fuel tank, it takes up to 15 minutes. NEXT: Go to next step
  9. PERFORM EVAP SYSTEM CHECK (STEP 4/6) Check the EVAP pressure in step 4/6. RESULT DTC*1 Result Suspected Trouble Area Proceed to - EVAP pressure increases by 0.3 kPa(gauge) [2.25 mmHg(gauge)] or more within 10 seconds of proceeding from step 3/6 to step 4/6 Not yet determined A P0441 *2 EVAP pressure increases by 0.3 kPa(gauge) [2.25 mmHg(gauge)] or more within 10 seconds of proceeding from step 3/6 to step 4/6 Purge VSV Purge VSV circuit Problems in EVAP hose between purge VSV and intake manifold Problems in EVAP hose between canister and purge VSV ECM B P0441 Variation in EVAP pressure is less than 0.3 kPa(gauge) [2.25 mmHg(gauge)] for 10 seconds, after proceeding from step 3/6 to step 4/6 Purge VSV stuck closed Purge VSV circuit Canister (charcoal filter inside canister) clogged Problems in EVAP hose between purge VSV and intake manifold Problems in EVAP hose between canister and purge VSV ECM C *1: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above. *2: This result suggests that due to purge line blockage or purge VSV malfunction, the DTC was stored by the purge flow monitor while the engine was running, or that key-off monitor test result were nearly borderline values. B --> See step 22 C --> See step 17 A: Go to next step
  10. PERFORM EVAP SYSTEM CHECK (STEP 5/6) Check the EVAP pressure in step 5/6. Compare the EVAP pressure in step 3/6 and the second reference pressure (step 5/6). RESULT DTC* Result Suspected Trouble Area Proceed to - EVAP pressure from step 3/6 less than second reference pressure (step 5/6) Not yet determined (no leakage from EVAP system) A P0441 and P0455 EVAP pressure from step 3/6 higher than [second reference pressure (step 5/6) x 0.2] Purge VSV stuck open EVAP gross leak B P0456 EVAP pressure from step 3/6 higher than second reference pressure (step 5/6) EVAP small leak B *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above. A --> See step 43 B --> See step 17
  11. PERFORM EVAP SYSTEM CHECK (STEP 3/6) Check the EVAP pressure in step 3/6. RESULT DTC* Result Suspected Trouble Area Proceed to P043F EVAP pressure less than [reference pressure] measured in step 2/6 Reference orifice high-flow A P2401 EVAP pressure almost same as [reference pressure] measured in step 2/6 Leak detection pump stuck off B *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above. HINT: The first reference pressure is the value determined in step 2/6. A --> See step 38 B --> See step 31
  12. INSPECT CANISTER PUMP MODULE (CANISTER PRESSURE SENSOR CIRCUIT) Check the canister pressure sensor circuit, referring to DTC P0451 canister pressure sensor circuit inspection procedure. Refer to «DTC P0451: Evaporative Emission Control System Pressure Sensor Range / Performance; DTC P0452: Evaporative Emission Control System Pressure Sensor / Switch Low Input; DTC P0453: Evaporative Emission Control System Pressure Sensor / Switch High Input»(ref-600582-S34769288842014022400000) . NEXT --> See step 49
  13. INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION) Turn the power switch off. Disconnect the canister pump module connector. TEXT IN ILLUSTRATION *1 Component without harness connected (Canister Pump Module) Apply the auxiliary battery voltage to terminals VLVB and VGND of the pump module. Touch the canister pump module to confirm the vent valve operation. RESULT Condition Tester Result Suspected Trouble Area Proceed to Apply auxiliary battery voltage to terminals VLVB and VGND Operating Wire harness or connector between vent valve and ECM Leak detection pump performance deteriorates Leak detection pump circuit malfunctioning (large resistance exists in the circuit) ECM A Not operating Vent valve B B --> See step 38 A: Go to next step
  14. CHECK HARNESS AND CONNECTOR (ECM - CANISTER PUMP MODULE) Turn the power switch off. Disconnect the canister pump module connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A20-7 (VPMP) - U41-1 (VGND) Always Below 1 ohms A20-7 (VPMP) or U41-1 (VGND) - Body ground Always 10 kohms or higher RESULT Result Suspected Trouble Area Proceed to OK Leak detection pump performance deteriorates Leak detection pump circuit malfunctioning (large resistance exists in the circuit) ECM A NG Wire harness or connector between ECM and canister pump module B B --> See step 40 A: Go to next step
  15. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - BODY GROUND) Disconnect the canister pump module connector. Measure the resistance according to the value(s) in the table below. RESULT Tester Connection Condition Specified Condition Suspected Trouble Area Proceed to U41-4 (MGND) - Body ground Always Below 1 ohms Canister pump module Wire harness or connector between canister pump module and ECM ECM A 10 kohms or higher Wire harness or connector between canister pump module and body ground B B --> See step 40 A: Go to next step
  16. CHECK HARNESS AND CONNECTOR (ECM - CANISTER PUMP MODULE) Disconnect the canister pump module connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. RESULT Tester Connection Condition Specified Condition Suspected Trouble Area Proceed to A20-6 (MPMP) - U41-3 (MTRB) Always Below 1 ohms Canister pump module ECM A 10 kohms or higher Wire harness or connector between ECM and canister pump module B A --> See step 45 B --> See step 40
  17. PERFORM ACTIVE TEST USING TECHSTREAM (PURGE VSV) Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the VSV for EVAP Control. Disconnect the hose (connected to the canister) from the purge VSV. TEXT IN ILLUSTRATION *1 Purge VSV *2 Hose (to Canister) Start the engine. Using the Techstream, turn off the purge VSV (Activate the VSV for Evap Control: OFF). Use your finger to confirm that the purge VSV has no suction. Using the Techstream, turn on the purge VSV (Activate the VSV for Evap Control: ON). Use your finger to confirm that the purge VSV has suction. RESULT Test Result Suspected Trouble Area Proceed to No suction when purge VSV turned off, and suction applied when turned on Blockage in the purge line is considered (based on result of step 9): Problems with EVAP hose between canister and purge VSV Canister (charcoal filter inside canister) clogged ECM A Leakage is considered (based on result of step 10): Fuel cap Leakage from EVAP line, fuel tank, or canister assembly B Suction applied when purge VSV turned off Purge VSV stuck open C No suction when purge VSV turned on Purge VSV stuck closed Problems with EVAP hose between purge VSV and intake manifold D B --> See step 20 C --> See step 21 D --> See step 23 A: Go to next step
  18. INSPECT EVAP HOSE (PURGE VSV - CANISTER) Check for blockages in the EVAP purge line between the purge VSV and canister. OK No blockages in the EVAP purge line between the purge VSV and canister. NG --> See step 44 OK: Go to next step
  19. INSPECT CANISTER (CHARCOAL FILTER INSIDE CANISTER) Check for filter blockage in the canister. Refer to «INSPECTION [03/2012 - ]»(ref-600566-S03355413762014022400000) . OK No blockages in the canister. OK --> See step 47 NG --> See step 48
  20. CHECK FUEL CAP ASSEMBLY Check that the fuel cap is correctly installed and confirm that the fuel cap meets OEM specifications. Tighten the fuel cap firmly (only one click sound could be heard). HINT: If an EVAP tester is available, check the fuel cap using the EVAP tester. Remove the fuel cap and install it onto a fuel cap adapter. Connect an EVAP tester pump hose to the adapter, and pressurize the cap to 3.2 to 3.7 kPa(gauge) [24 to 28 mmHg(gauge)] using an EVAP tester pump. Seal the adapter and wait for 2 minutes. Check the pressure. If the pressure is 2 kPa(gauge) [15 mmHg(gauge)] or more, the fuel cap is normal. RESULT Test Result Suspected Trouble Area Proceed to Fuel cap correctly installed - A Fuel cap loose Fuel cap improperly installed Defective fuel cap Fuel cap does not meet OEM specifications B Defective fuel cap - B No fuel cap - C A --> See step 37 B --> See step 35 C --> See step 36
  21. INSPECT PURGE VSV Turn the power switch off. Disconnect the purge VSV connector. TEXT IN ILLUSTRATION *1 Purge VSV *2 Hose (to Canister) Disconnect the hose (connected to the canister) from the purge VSV. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE [03/2012 - ]»(ref-600412-S34816019962014022400000) . Start the engine. Use your finger to confirm that the purge VSV has no suction. RESULT Test Result Suspected Trouble Area Proceed to No suction Wire harness or connector between purge VSV and ECM (short to ground) ECM A Suction applied Purge VSV B A --> See step 26 B --> See step 39
  22. INSPECT EVAP HOSE (PURGE VSV - CANISTER) Check for blockages in the EVAP purge line between the purge VSV and canister. OK No blockages in the EVAP purge line between the purge VSV and canister. NG --> See step 44 OK: Go to next step
  23. CHECK EVAP HOSE (PURGE VSV - INTAKE MANIFOLD) Disconnect the hose (connected to the intake manifold) from the purge VSV. TEXT IN ILLUSTRATION *1 Purge VSV *2 Hose (to Intake Manifold) Start the engine. Use your finger to confirm that the hose has suction. RESULT Test Result Suspected Trouble Area Proceed to Suction applied EVAP hose between purge VSV and intake manifold normal Purge VSV Purge VSV power source Wire harness or connector between purge VSV and ECM A No suction Intake manifold port EVAP hose between purge VSV and intake manifold B B --> See step 34 A: Go to next step
  24. INSPECT PURGE VSV Remove the purge VSV. Apply auxiliary battery voltage to the terminals of the purge VSV. TEXT IN ILLUSTRATION *1 Purge VSV Confirm that air flows from port E to port F. RESULT Test Result Condition Suspected Trouble Area Proceed to Air flows Auxiliary battery voltage is applied to purge VSV terminals Purge VSV normal Purge VSV power source Wire harness or connector between purge VSV and ECM A No air flow Auxiliary battery voltage is applied to purge VSV terminals Purge VSV B B --> See step 39 A: Go to next step
  25. CHECK TERMINAL VOLTAGE (POWER SOURCE OF PURGE VSV) Disconnect the purge VSV connector. Turn the power switch on (IG). TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Purge VSV) Measure the voltage according to the value(s) in the table below. RESULT Tester Connection Switch Condition Specified Condition Suspected Trouble Area Proceed to F25-1 - Body ground Power switch on 11 to 14 V Purge VSV power source normal Wire harness or connector between purge VSV and ECM A Other than result above Wire harness or connectors between purge VSV and auxiliary battery B B --> See step 40 A: Go to next step
  26. CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM) Disconnect the ECM connector. Disconnect the purge VSV connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F25-2 - F5-48 (PRG) Always Below 1 ohms F25-2 or F5-48 (PRG) - Body ground Always 10 kohms or higher OK --> See step 47 NG --> See step 40
  27. INSPECT CANISTER PUMP MODULE (POWER SOURCE FOR VENT VALVE) Turn the power switch off. Disconnect the canister pump module connector. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. RESULT Tester Connection Switch Condition Specified Condition Suspected Trouble Area Proceed to U41-5 (VLVB) - Body ground Power switch on 11 to 14 V Wire harness or connector between vent valve and ECM Vent valve Canister (charcoal filter inside canister) clogged ECM A Below 3 V Power source wire harness of vent valve B TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Canister Pump Module) B --> See step 40 A: Go to next step
  28. INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION) Turn the power switch off. Disconnect the canister pump module connector. TEXT IN ILLUSTRATION *1 Component without harness connected (Canister Pump Module) Apply the auxiliary battery voltage to terminals VLVB and VGND of the pump module. Touch the canister pump module to confirm the vent valve operation. RESULT Condition Tester Result Suspected Trouble Area Proceed to Apply auxiliary battery voltage to terminals VLVB and VGND Operating Wire harness or connector between vent valve and ECM Canister (charcoal filter inside canister) clogged ECM A Not operating Vent valve B B --> See step 38 A: Go to next step
  29. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM) Turn the power switch off. Disconnect the canister pump module connector. Measure the resistance according to the value(s) in the table below. RESULT Tester Connection Condition Test Result Suspected Trouble Area Proceed to A20-7 (VPMP) - U41-1 (VGND) Always Below 1 ohms Canister (charcoal filter inside canister) clogged ECM A 10 kohms or higher Wire harness or connector between ECM and canister pump module B B --> See step 40 A: Go to next step
  30. INSPECT CANISTER (CHARCOAL FILTER INSIDE CANISTER) Check for filter blockage in the canister. Refer to «INSPECTION [03/2012 - ]»(ref-600566-S03355413762014022400000) . OK No blockages in the canister. OK --> See step 47 NG --> See step 48
  31. CHECK TERMINAL VOLTAGE (CANISTER PUMP MODULE) Turn the power switch off. Disconnect the canister pump module connector. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. RESULT Tester Connection Condition Test Result Suspected Trouble Area Proceed to U41-3 (MTRB) - Body ground Power switch on (IG) 9 to 14 V Wire harness or connector between leak detection pump and body ground Leak detection pump A Below 3 V Wire harness or connector between leak detection pump and ECM ECM B TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Canister Pump Module) B --> See step 33 A: Go to next step
  32. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - BODY GROUND) Turn the power switch off. Disconnect the canister pump module connector. Measure the resistance according to the value(s) in the table below. RESULT Tester Connection Condition Specified Condition Suspected Trouble Area Proceed to U41-4 (MGND) - Body ground Always Below 1 ohms Leak detection pump A 10 kohms or higher Wire harness or connector between canister pump module and body ground B A --> See step 38 B --> See step 40
  33. CHECK HARNESS AND CONNECTOR (ECM - CANISTER PUMP MODULE) Turn the power switch off. Disconnect the canister pump module connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A20-6 (MPMP) - U41-3 (MTRB) Always Below 1 ohms A20-6 (MPMP) or U41-3 (MTRB) - Body ground Always 10 kohms or higher RESULT Result Suspected Trouble Area Proceed to OK ECM A NG Wire harness or connector between ECM and canister pump module B A --> See step 47 B --> See step 40
  34. INSPECT INTAKE MANIFOLD (EVAP PURGE PORT) Stop the engine. Disconnect the EVAP hose from the intake manifold. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE [03/2012 - ]»(ref-600412-S34816019962014022400000) . Start the engine. Use your finger to confirm that the port of the intake manifold has suction. RESULT Tester Connection Suspected Trouble Area Proceed to Suction applied EVAP hose between intake manifold and purge VSV A No suction Intake manifold B A --> See step 41 B --> See step 42
  35. CORRECTLY REINSTALL OR REPLACE FUEL TANK CAP ASSEMBLY HINT: When reinstalling the fuel cap, tighten it firmly (only one click sound should be heard). When replacing the fuel cap, use a fuel cap that meets OEM specifications, and install it firmly. NEXT --> See step 49
  36. REPLACE FUEL TANK CAP ASSEMBLY HINT: When installing the fuel cap, tighten it firmly (only one click sound should be heard). NEXT --> See step 49
  37. LOCATE EVAP LEAK PART Disconnect the vent hose. TEXT IN ILLUSTRATION *1 Vent Hose *2 Canister Pump Module *3 EVAP Tester *4 Adapter *a Disconnect the Vent Hose - - Connect the EVAP pressure tester tool to the canister pump module with the adapter. Pressurize the EVAP system to 3.2 to 3.7 kPa(gauge) [24 to 28 mmHg(gauge)]. Apply soapy water to the piping and connecting parts of the EVAP system. Look for areas where bubbles appear. This indicates the leak point. Repair or replace the leak point. HINT: Disconnect the hose between the canister and fuel tank from the canister. Block the canister side and conduct an inspection. In this way, the fuel tank can be excluded as an area suspected of causing fuel leaks. NEXT --> See step 49
  38. REPLACE CANISTER PUMP MODULE Replace the canister pump module. Refer to «REMOVAL [03/2012 - ]»(ref-600566-S04098785092014022400000) . NOTE: When replacing canister pump module, check the canister pump module interior, canister interior and related pipes for water, fuel and other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the pipe from the air inlet port to the canister pump module; 2) the canister filter; and 3) the fuel tank vent hose. If liquids are present in canister interior, replace canister and canister pump module together (replace canister assembly). Check for filter blockage in the canister assembly. If the charcoal filter inside the canister assembly is clogged, replace canister and canister pump module together (replace canister assembly). Check for filter blockage in the canister filter. If the canister filter has blockages, replace the fuel tank filler pipe assembly. TEXT IN ILLUSTRATION *1 Fuel Tank Vent Hose *2 Vent Hose *3 Air Inlet Port *4 Fuel Tank *5 Canister Pump Module *6 Canister Assembly *7 Fuel Tank Filler Pipe Assembly (Canister Filter) - - *a Inspection Area (check for disconnection and/or cracks) - - NEXT --> See step 49
  39. REPLACE PURGE VSV Replace the purge VSV. Refer to «REMOVAL [03/2012 - ]»(ref-600566-S04128500482014022400000) . NEXT --> See step 49
  40. REPAIR OR REPLACE HARNESS OR CONNECTOR NEXT --> See step 49
  41. REPAIR OR REPLACE EVAP PURGE LINE (INTAKE MANIFOLD - PURGE VSV) NEXT --> See step 49
  42. INSPECT INTAKE MANIFOLD (EVAP PURGE PORT) Check that the EVAP purge port of the intake manifold is not clogged. If necessary, replace the intake manifold. Refer to «REMOVAL [03/2012 - ]»(ref-600587-S13006501752014022400000) . NEXT --> See step 49
  43. REPAIR OR REPLACE PARTS AND COMPONENTS INDICATED BY OUTPUT DTCS Repair the malfunctioning areas indicated by the DTCs that had been confirmed when the vehicle was brought in. NEXT --> See step 49
  44. REPAIR OR REPLACE EVAP PURGE LINE (PURGE VSV - CANISTER) NEXT --> See step 49
  45. REPLACE CANISTER PUMP MODULE Replace the canister pump module. Refer to «REMOVAL [03/2012 - ]»(ref-600566-S04098785092014022400000) . NOTE: When replacing canister pump module, check the canister pump module interior, canister interior and related pipes for water, fuel and other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the pipe from the air inlet port to the canister pump module; 2) the canister filter; and 3) the fuel tank vent hose. If liquids are present in canister interior, replace canister and canister pump module together (replace canister assembly). Check for filter blockage in the canister assembly. If the charcoal filter inside the canister assembly is clogged, replace canister and canister pump module together (replace canister assembly). Check for filter blockage in the canister filter. If the canister filter has blockages, replace the fuel tank filler pipe assembly. TEXT IN ILLUSTRATION *1 Fuel Tank Vent Hose *2 Vent Hose *3 Air Inlet Port *4 Fuel Tank *5 Canister Pump Module *6 Canister Assembly *7 Fuel Tank Filler Pipe Assembly (Canister Filter) - - *a Inspection Area (check for disconnection and/or cracks) - - NEXT: Go to next step
  46. PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE) NOTE: The Evaporative System Check (Automatic Mode) consists of 6 steps performed automatically by the Techstream. It takes a maximum of approximately 24 minutes. Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable. Do not run the engine in this step. When the temperature of the fuel is 35°C (95°F) or higher, a large amount of vapor forms and any check results become inaccurate. When performing an Evaporative System Check, keep the fuel temperature below 35°C (95°F). Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600436-S38423165432014022400000) . Enter the following menus: Powertrain / Engine and ECT / Utility / Evaporative System Check / Automatic Mode. After the Evaporative System Check is completed, check for pending DTCs by entering the following menus: Powertrain / Engine and ECT / Trouble Codes. Result Proceed to EVAP system DTCs are output A No DTCs output (No pending DTCs output) B B --> END A: Go to next step
  47. REPLACE ECM Replace the ECM. Refer to «REMOVAL [03/2012 - ]»(ref-600565-S01816401622014022400000) . NEXT --> See step 49
  48. REPLACE CANISTER ASSEMBLY Replace the canister assembly. Refer to «REMOVAL [03/2012 - ]»(ref-600566-S04098785092014022400000) . NOTE: When replacing the canister assembly, check the canister pump module interior and related pipes for water, fuel and other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the pipe from the air inlet port to the canister pump module; 2) the canister filter; and 3) the fuel tank vent hose. Check for filter blockage in the canister filter. If the canister filter has blockages, replace the fuel tank filler pipe assembly. TEXT IN ILLUSTRATION *1 Fuel Tank Vent Hose *2 Vent Hose *3 Air Inlet Port *4 Fuel Tank *5 Canister Pump Module *6 Canister Assembly *7 Fuel Tank Filler Pipe Assembly (Canister Filter) - - *a Inspection Area (check for disconnection and/or cracks) - - NEXT: Go to next step
  49. PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE) NOTE: The Evaporative System Check (Automatic Mode) consists of 6 steps performed automatically by the Techstream. It takes a maximum of approximately 24 minutes. Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable. Do not run the engine in this step. When the temperature of the fuel is 35°C (95°F) or higher, a large amount of vapor forms and any check results become inaccurate. When performing an Evaporative System Check, keep the fuel temperature below 35°C (95°F). Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600436-S38423165432014022400000) . Enter the following menus: Powertrain / Engine and ECT / Utility / Evaporative System Check / Automatic Mode. After the Evaporative System Check is completed, check for pending DTCs by entering the following menus: Powertrain / Engine and ECT / Trouble Codes. HINT: If no pending DTCs are found, the repair has been successfully completed. NEXT --> END

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Scheme 64

Scheme 64: PROCEDURE
Scheme 64: PROCEDURE
  1. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP/SPEED) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump/Speed. Check whether operating sounds can be heard while operating the fuel pump using the Techstream. OK Operating sounds can be heard from fuel pump. NG --> See step 7 OK: Go to next step
  2. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP) Remove the fuel tank assembly. Refer to «REMOVAL [03/2012 - ]»(ref-600584-S13070058862014022400000) . Remove the fuel pump from the fuel tank assembly. Clean the fuel pump to completely remove any remaining fuel. Connect the fuel pump connector. WARNING: Make sure that there is no fuel remaining inside or on the outside of the fuel pump. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump Duty. Operate the fuel pump using the Active Test function and measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Techstream Operation Specified Condition 1 - 2 FPC Duty: 25% 3.2 to 4.05 V FPC Duty: 80% 8.8 to 12.5 V Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump/Speed. Operate the fuel pump using the Active Test function and measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Techstream Operation Specified Condition 1 - 2 ON (FPC Duty: 90%) 9.0 to 14.0 V HINT: Be sure to measure the voltage with all the connectors connected. Before performing this inspection, check that the auxiliary battery voltage is between 11 and 14 V (not depleted). TEXT IN ILLUSTRATION *a Component with harness connected (Fuel Pump) NG --> See step 5 OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (FUEL PUMP ECU - ECM) Disconnect the fuel pump ECU connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition U38-5 (FPC) - A20-18 (FPC) Always Below 1 ohms U38-5 (FPC) or A20-18 (FPC) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. REPLACE FUEL PUMP Replace the fuel pump. Refer to «REMOVAL [03/2012 - ]»(ref-600584-S06179532422014022400000) . HINT: Perform "Inspection After Repair" after replacing the fuel pump. Refer to «INITIALIZATION [03/2012 - ]»(ref-600436-S34722863312014022400000) . NEXT --> See step 6
  5. REPLACE FUEL PUMP ECU Replace the fuel pump ECU. Refer to «REMOVAL [03/2012 - ]»(ref-600584-S05048915282014022400000) . NEXT: Go to next step
  6. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Check the fuel pump operation. OK Malfunction has been repaired successfully. NG --> See step 17 OK --> END
  7. INSPECT FUEL PUMP ECU (POWER SOURCE VOLTAGE) Disconnect the fuel pump ECU connector. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition U38-6 (+B) - Body Ground Power switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Fuel Pump ECU) NG --> See step 14 OK: Go to next step
  8. CHECK HARNESS AND CONNECTOR (FUEL PUMP ECU - BODY GROUND) Disconnect the fuel pump ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition U38-3 (E) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  9. CHECK HARNESS AND CONNECTOR (FUEL PUMP - FUEL PUMP ECU) Disconnect the fuel pump connector. Disconnect the fuel pump ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition U11-4 (B) - U38-1 (FP) Always Below 1 ohms U11-5 (E) - U38-2 (FP-) Always Below 1 ohms U11-4 (B) or U38-1 (FP) - Body ground Always 10 kohms or higher U11-5 (E) or U38-2 (FP-) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  10. INSPECT FUEL PUMP Inspect the fuel pump. Refer to «INSPECTION [03/2012 - ]»(ref-600584-S16351635822014022400000) . HINT: Perform "Inspection After Repair" after replacing the fuel pump. Refer to «INITIALIZATION [03/2012 - ]»(ref-600436-S34722863312014022400000) . NG --> See step 19 OK: Go to next step
  11. CHECK HARNESS AND CONNECTOR (FUEL PUMP ECU - ECM) Disconnect the fuel pump ECU connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition U38-5 (FPC) - A20-18 (FPC) Always Below 1 ohms U38-5 (FPC) or A20-18 (FPC) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  12. REPLACE FUEL PUMP ECU Replace the fuel pump ECU. Refer to «REMOVAL [03/2012 - ]»(ref-600584-S05048915282014022400000) . NEXT: Go to next step
  13. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Check the fuel pump operation. OK Malfunction has been repaired successfully. NG --> See step 16 OK --> END
  14. INSPECT NO. 1 INTEGRATION RELAY (EFI MAIN2) Inspect the No. 1 integration relay (EFI MAIN2). Refer to «ON-VEHICLE INSPECTION [03/2012 - ] - Step 2»(ref-600565-S40881990102014022400000) . NG --> REPLACE NO. 1 INTEGRATION RELAY OK: Go to next step
  15. CHECK HARNESS AND CONNECTOR (EFI MAIN2 RELAY - FUEL PUMP ECU) Remove the No. 1 integration relay from the No. 1 engine room relay block and junction block assembly. Disconnect the fuel pump ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1F-12 - U38-6 (+B) Always Below 1 ohms 1F-12 or U38-6 (+B) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 18
  16. REPLACE ECM. Refer to «REMOVAL [03/2012 - ]»(ref-600565-S01816401622014022400000)
  17. REPLACE ECM. Refer to «REMOVAL [03/2012 - ]»(ref-600565-S01816401622014022400000)
  18. GO TO ECM POWER SOURCE CIRCUIT. Refer to «ECM Power Source Circuit»(ref-600578-S39722387982014022400000)
  19. REPLACE FUEL PUMP. Refer to «REMOVAL [03/2012 - ]»(ref-600584-S06179532422014022400000)

More articles — Engine Control System (Diagnostic Codes (P0604 - U0293) & Circuit Tests)