Engine Control (2GR-FE) (Diagnostic Codes (P2102-U0101) & Circuit Tests): Other Toyota Venza I

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

ALL

P2102

P2103

TYPICAL MALFUNCTION THRESHOLDS

P2102

P2103

Scheme 379

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the Clear DTC procedure). Refer to «DTC CHECK / CLEAR»(ref-394619-S02527777542011040800000) .
4. Turn the ignition switch off and wait for at least 30 seconds.
5. Turn the ignition switch to ON and turn the Techstream on [A].
6. Start the engine.
7. With the vehicle stationary, fully depress the accelerator pedal and quickly release it [B].
8. Check that 16 seconds or more have elapsed from the instant when the accelerator pedal is first depressed.
9. Enter the following menus: Powertrain / Engine / Trouble Codes.
10. Read the DTC [C].
11. If a DTC is output, the system is malfunctioning. HINT: If a DTC is not output, perform the following procedure.
12. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
13. Input the DTC: P2102 or P2103.
14. 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 driving pattern after confirming DTC enabling conditions UNKNOWN Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows NORMAL, the system is normal. If the judgment result shows INCOMPLETE or UNKNOWN, perform steps [B] through [C] again.
15. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
16. Check the judgment result. HINT: If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows NORMAL, the system is normal.
17. If the test result is INCOMPLETE or UNKNOWN and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(ref-394619-S02527777542011040800000) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

FAIL-SAFE

When any of these DTCs, as well as other DTCs relating to electronic throttle control system malfunctions are stored, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to the throttle actuator, and the throttle valve is returned to a 6° throttle angle by the return spring. The ECM then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition timing, in accordance with the accelerator pedal opening angle, to allow the vehicle to continue at a minimal speed. If the accelerator pedal is depressed firmly and gently, the vehicle can be driven slowly.

Fail-safe mode continues until a pass condition is detected, and the ignition switch is then turned off.

Scheme 380

ALL

P2111: THROTTLE ACTUATOR STUCK OPEN

P2112: THROTTLE ACTUATOR STUCK CLOSED

P2111: THROTTLE ACTUATOR STUCK OPEN

P2112: THROTTLE ACTUATOR STUCK CLOSED

Scheme 381

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the Clear DTC procedure). Refer to «DTC CHECK / CLEAR»(ref-394619-S02527777542011040800000) .
4. Turn the ignition switch off and wait for at least 30 seconds.
5. Turn the ignition switch to ON and turn the Techstream on [A].
6. Start the engine and fully depress and release the accelerator pedal quickly (to fully open and close the throttle valve).
7. Enter the following menus: Powertrain / Engine / Trouble Codes.
8. Read the DTC [B].
9. If a DTC is output, the system is malfunctioning. HINT: If a DTC is not output, perform the following procedure.
10. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
11. Input the DTC: P2111 or P2112.
12. 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 driving pattern after confirming DTC enabling conditions UNKNOWN Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU's memory limit HINT: If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows NORMAL, the system is normal. If the judgment result shows INCOMPLETE or UNKNOWN, perform steps [B] through [C] again.
13. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
14. Check the judgment result. HINT: If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows NORMAL, the system is normal.
15. If the test result is INCOMPLETE or UNKNOWN and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(ref-394619-S02527777542011040800000) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

When any of these DTCs, as well as other DTCs relating to electronic throttle control system malfunctions are stored, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to the throttle actuator, and the throttle valve is returned to a 6° throttle angle by the return spring. The ECM then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition timing, in accordance with the accelerator pedal opening angle, to allow the vehicle to continue at a minimal speed. If the accelerator pedal is depressed firmly and gently, the vehicle can be driven slowly.

Fail-safe mode continues until a pass condition is detected, and the ignition switch is then turned off.

PROCEDURE

1. INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY (VISUALLY CHECK THROTTLE VALVE) Check for contamination between the throttle valve and the housing. If necessary, clean the throttle with motor body assembly. And check that the throttle valve moves smoothly. OK Throttle valve is not contaminated with foreign objects and moves smoothly. NG --> See step 5 OK: Go to next step
2. CHECK WHETHER DTC OUTPUT RECURS (DTC P2111 OR P2112) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-394619-S02527777542011040800000) . Start the engine, and fully depress and release the accelerator pedal quickly (to fully open and close the throttle valve). Enter the following menus: Powertrain / Engine / Trouble Codes. Read the DTCs. Result Result Proceed to DTC is not output A DTC P2111 or P2112 is output B B --> See step 3 A --> See step 4
3. REPLACE ECM. Refer to «REMOVAL»(ref-394792-S25581811582011040800000)
4. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-394619-S06103702132011040800000)
5. REPLACE THROTTLE WITH MOTOR BODY ASSEMBLY. Refer to «REMOVAL»(ref-394792-S31816001072011040800000)

COMPONENT OPERATING RANGE

Scheme 382

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the Clear DTC procedure). Refer to «DTC CHECK / CLEAR»(ref-394619-S02527777542011040800000) .
4. Turn the ignition switch off and wait for at least 30 seconds.
5. Turn the ignition switch to ON and turn the Techstream on [A].
6. Start the engine.
7. Slowly depress the accelerator pedal, raise the engine speed to approximately 3000 rpm for approximately 5 seconds, and then idle the engine [B].
8. Enter the following menus: Powertrain / Engine / Trouble Codes.
9. Read the DTC [C].
10. If a DTC is output, the system is malfunctioning. HINT: If a DTC is not output, perform the following procedure.
11. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
12. Input the DTC: P2118.
13. 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 driving pattern after confirming DTC enabling conditions UNKNOWN Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows NORMAL, the system is normal. If the judgment result shows INCOMPLETE or UNKNOWN, perform steps [B] and [C] again.
14. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
15. Check the judgment result. HINT: If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows NORMAL, the system is normal.
16. If the test result is INCOMPLETE or UNKNOWN and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(ref-394619-S02527777542011040800000) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

When any of these DTCs, as well as other DTCs relating to electronic throttle control system malfunctions are stored, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to the throttle actuator, and the throttle valve is returned to a 6° throttle angle by the return spring. The ECM then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition timing, in accordance with the accelerator pedal opening angle, to allow the vehicle to continue at a minimal speed. If the accelerator pedal is depressed firmly and gently, the vehicle can be driven slowly.

Fail-safe mode continues until a pass condition is detected, and the ignition switch is then turned off.

Scheme 383

Scheme 384

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the Clear DTC procedure). Refer to «DTC CHECK / CLEAR»(ref-394619-S02527777542011040800000) .
4. Turn the ignition switch off and wait for at least 30 seconds.
5. Turn the ignition switch to ON and turn the Techstream on [A].
6. Start the engine.
7. Idle the engine for 20 seconds.
8. Enter the following menus: Powertrain / Engine / Trouble Codes.
9. Read the DTC [B].
10. If a DTC is output, the system is malfunctioning. HINT: If a DTC is not output, perform the following procedure.
11. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
12. Input the DTC: P2119.
13. 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 driving pattern after confirming DTC enabling conditions UNKNOWN Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows NORMAL, the system is normal. If the judgment result shows INCOMPLETE or UNKNOWN, fully depress and release the accelerator pedal 3 times, and then check the DTC judgment result at step.
14. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
15. Check the judgment result [C]. HINT: If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows NORMAL, the system is normal.
16. If the test result is INCOMPLETE or UNKNOWN and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(ref-394619-S02527777542011040800000) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

When any of these DTCs, as well as other DTCs relating to electronic throttle control system malfunctions are stored, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to the throttle actuator, and the throttle valve is returned to a 6° throttle angle by the return spring. The ECM then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition timing, in accordance with the accelerator pedal opening angle, to allow the vehicle to continue at a minimal speed. If the accelerator pedal is depressed firmly and gently, the vehicle can be driven slowly.

Fail-safe mode continues until a pass condition is detected, and the ignition switch is then turned off.

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2119) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Trouble Codes. Read the DTCs. Result Result Proceed to DTC P2119 is output A DTC P2119 and other DTCs are output B HINT: If any DTCs other than P2119 are output, troubleshoot those DTCs first. B --> See step 5 A: Go to next step
2. INSPECT THROTTLE BODY (RESISTANCE OF THROTTLE ACTUATOR) Disconnect the throttle with motor body assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2 (M+) - 1 (M-) 20°C (68°F) 0.3 to 100 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Throttle with Motor Body Assembly) Reconnect the throttle with motor body assembly connector. NG --> See step 6 OK: Go to next step
3. REPLACE ECM Replace the ECM. Refer to «REMOVAL»(ref-394792-S25581811582011040800000) . NEXT: Go to next step
4. CHECK WHETHER DTC OUTPUT RECURS (DTC P2119) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear the DTCs (even if no DTCs are stored, perform the Clear DTC procedure). Refer to «DTC CHECK / CLEAR»(ref-394619-S02527777542011040800000) . Allow the engine to idle for 15 seconds or more. Fully depress and release the accelerator pedal several quickly. Enter the following menus: Powertrain / Engine / Trouble Codes. Read the DTCs. HINT: The output voltage of the throttle position sensor can be checked using the Techstream. Variations in the output voltage indicate that the throttle actuator is in operation. To check the output voltage using the Techstream, enter the following menus: Powertrain / Engine / Data List / Throttle Position No. 1. Result Result Proceed to DTC is not output A DTC P2119 is output B B --> See step 6 A --> END
5. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-394619-S37978292982011040800000)
6. REPLACE THROTTLE WITH MOTOR BODY ASSEMBLY. Refer to «REMOVAL»(ref-394792-S31816001072011040800000)

P2120

P2122

P2123

P2125

P2127

P2128

P2138

Scheme 385

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the Clear DTC procedure). Refer to «DTC CHECK / CLEAR»(ref-394619-S02527777542011040800000) .
4. Turn the ignition switch off and wait for at least 30 seconds.
5. Turn the ignition switch to ON and turn the Techstream on [A].
6. Fully depress and release the accelerator pedal [B].
7. Check that 5 seconds or more have elapsed since the DTCs were cleared.
8. Enter the following menus: Powertrain / Engine / Trouble Codes.
9. Read the DTC [C].
10. If a DTC is output, the system is malfunctioning. HINT: If a DTC is not output, perform the following procedure.
11. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
12. Input the DTC: P2120, P2122, P2123, P2125, P2127, P2128 or P2138.
13. 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 driving pattern after confirming DTC enabling conditions UNKNOWN Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows NORMAL, the system is normal. If the judgment result shows INCOMPLETE or UNKNOWN, perform steps [B] and [C] again.
14. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
15. Check the judgment result. HINT: If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows NORMAL, the system is normal.
16. If the test result is INCOMPLETE or UNKNOWN and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(ref-394619-S02527777542011040800000) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

When any of DTCs P2120, P2122, P2123, P2125, P2127, P2128 and P2138 are set, the ECM enters fail-safe mode. If either of the 2 sensor circuits malfunctions, the ECM uses the remaining circuit to calculate the accelerator pedal position to allow the vehicle to continue driving. If both of the circuits malfunction, the ECM regards the accelerator pedal as being released. As a result, the throttle valve is closed and the engine idles. Fail-safe mode continues until a pass condition is detected, and the ignition switch is turned off.

Scheme 386

Scheme 387

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the Clear DTC procedure). Refer to «DTC CHECK / CLEAR»(ref-394619-S02527777542011040800000) .
4. Turn the ignition switch off and wait for at least 30 seconds.
5. Turn the ignition switch to ON and turn the Techstream on [A].
6. Fully depress and release the accelerator pedal [B].
7. Check that 20 seconds or more have elapsed since the DTCs were cleared.
8. Enter the following menus: Powertrain / Engine / Trouble Codes.
9. Read the DTC [C].
10. If a DTC is output, the system is malfunctioning. HINT: If a DTC is not output, perform the following procedure.
11. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
12. Input the DTC: P2121.
13. 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 driving pattern after confirming DTC enabling conditions UNKNOWN Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows NORMAL, the system is normal. If the judgment result shows INCOMPLETE or UNKNOWN, perform steps [B] and [C] again.
14. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
15. Check the judgment result. HINT: If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows NORMAL, the system is normal.
16. If the test result is INCOMPLETE or UNKNOWN and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(ref-394619-S02527777542011040800000) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

The accelerator pedal sensor assembly has 2 (main and sub) sensor circuits. If a malfunction occurs in either of the sensor circuits, the ECM detects the abnormal signal voltage difference between the 2 sensor circuits and switches to limp mode. In limp mode, the functioning circuit is used to calculate the accelerator pedal angle to allow the vehicle to continue driving. If both circuits malfunction, the ECM regards the angle of the accelerator pedal as being fully closed. In this case, the throttle valve remains closed as if the engine is idling. If a pass condition is detected and then the ignition switch is turned off, the fail-safe operation stops and the system returns to a normal condition.

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2121) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Trouble Codes. Read the DTCs. Result Result Proceed to DTC P2121 is output A DTC P2121 and other DTCs are output B HINT: If any DTCs other than P2121 are output, troubleshoot those DTCs first. B --> See step 5 A: Go to next step
2. READ VALUE USING TECHSTREAM (ACCEL SENSOR OUT NO. 1 AND ACCEL SENSOR OUT NO. 2) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Accel Sensor Out No. 1 and Accel Sensor Out No. 2. Read the values displayed on the Techstream. Standard Voltage Accelerator Pedal Operation Accel Sensor Out No. 1 Accel Sensor Out No. 2 Released 0.5 to 1.1 V 1.2 to 2.0 V Depressed 2.6 to 4.5 V 3.4 to 4.8 V NG --> See step 3 OK --> See step 6
3. REPLACE ACCELERATOR PEDAL ASSEMBLY Replace the accelerator pedal assembly. Refer to «REMOVAL»(ref-394792-S34003772642011040800000) . NEXT: Go to next step
4. CHECK WHETHER DTC OUTPUT RECURS (DTC P2121) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear the DTC. Refer to «DTC CHECK / CLEAR»(ref-394619-S02527777542011040800000) . Start the engine. Allow the engine in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine / Trouble Codes. Read the DTCs. Result Result Proceed to DTC P2121 is output A DTC is not output B B --> END A --> See step 7
5. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-394619-S37978292982011040800000)
6. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-394619-S06103702132011040800000)
7. REPLACE ECM. Refer to «REMOVAL»(ref-394792-S25581811582011040800000)

ALL

SENSOR VOLTAGE DETECTION MONITOR

SENSOR CURRENT DETECTION MONITOR

SENSOR VOLTAGE DETECTION MONITOR (LEAN SIDE MALFUNCTION P2195, P2197)

SENSOR VOLTAGE DETECTION MONITOR (RICH SIDE MALFUNCTION P2196, P2198)

SENSOR CURRENT DETECTION MONITOR (HIGH SIDE MALFUNCTION P2195, P2197)

SENSOR CURRENT DETECTION MONITOR (LOW SIDE MALFUNCTION P2196, P2198)

MONITOR RESULT

Refer to Checking Monitor Status. Refer to CHECKING MONITOR STATUS .

Scheme 388

CONFIRMATION DRIVING PATTERN

This confirmation driving pattern is used in the "Perform Confirmation Driving Pattern" procedure of the following diagnostic troubleshooting procedure.

Scheme 389

Scheme 390

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Clear the DTCs (even if no DTCs are stored, perform the Clear DTC procedure). Refer to «DTC CHECK / CLEAR»(ref-394619-S02527777542011040800000) .
5. Turn the ignition switch off and wait for at least 30 seconds.
6. Turn the ignition switch to ON and turn the Techstream on.
7. Start the engine, and warm it up until the engine coolant temperature reaches 75°C (167°F) or more (Step "A").
8. On Techstream, enter the following menus to check the fuel-cut status: Powertrain / Engine / Data List / Idle Fuel Cut.
9. Drive the vehicle at between 38 and 75 mph (60 and 120 km/h) for at least 10 minutes (Step "B"). WARNING: When performing the confirmation driving pattern, obey all speed limits and traffic laws.
10. Shift the transmission to 2nd gear (Step "C").
11. Accelerate the vehicle to 40 mph (64 km/h) or more by depressing the accelerator pedal for at least 10 seconds (Step "D").
12. Soon after performing step "D" above, release the accelerator pedal for at least 4 seconds without depressing the brake pedal in order to execute fuel-cut control (Step "E"). HINT: Fuel-cut is performed when the following conditions are met: Accelerator pedal is fully released. Engine speed is 2500 rpm or more (fuel injection returns at 1000 rpm).
13. Allow the vehicle to decelerate until the vehicle speed decreases to less than 6 mph (10 km/h).
14. Repeat steps "C" through "E" above at least 3 times in one driving cycle.
15. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
16. Input the DTC: P2195, P2196, P2197 or P2198.
17. Check the DTC judgment result (Step "F"). Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions UNKNOWN Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows INCOMPLETE or UNKNOWN, perform steps "B" through "F".
18. If the test result is UNKNOWN, enter the following menus: Powertrain / Engine / Trouble Codes / Pending.
19. Read Pending DTCs. HINT: If a pending DTC is output, the system is malfunctioning.
20. If the test result is INCOMPLETE or UNKNOWN and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(ref-394619-S02527777542011040800000) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

P2237 AND P2240 (AIR FUEL RATIO SENSOR OPEN CIRCUIT BETWEEN A1A+ AND A1A-/A2A+ AND A2A-)

P2238 AND P2241 (LOW ADMITTANCE)

OTHERS

P2237 AND P2240 (OPEN CIRCUIT BETWEEN A1A+ AND A1A-/A2A+ AND A2A-)

P2238 AND P2241 (SHORT CIRCUIT BETWEEN A1A+ AND GND/A2A+ AND GND)

P2238 AND P2241 (SHORT CIRCUIT BETWEEN A1A+ AND A1A-/A2A+ AND A2A-)

P2239 AND P2242 (SHORT CIRCUIT BETWEEN A1A+ AND +B/A2A+ AND +B)

P2252 AND P2255 (SHORT CIRCUIT BETWEEN A1A- AND GND/A2A- AND GND)

P2253 AND P2256 (SHORT CIRCUIT BETWEEN A1A- AND +B/A2A- AND +B)

Scheme 391

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch ON and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure). Refer to «DTC CHECK / CLEAR»(ref-394619-S02527777542011040800000) .
4. Turn the ignition switch off and wait for 30 seconds.
5. Turn the ignition switch ON and turn the Techstream on [A].
6. Start the engine and wait 2 minutes.
7. Enter the following menus: Powertrain / Engine / Trouble Codes / Pending.
8. Read the pending DTC [B].
9. If a pending DTC is output, the system is malfunctioning. HINT: If a pending DTC is not output, perform the following procedure.
10. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
11. Input the DTC: P2237, P2238, P2239, P2240, P2241, P2242, P2252, P2253, P2255 or P2256.
12. 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 driving pattern after confirming DTC enabling conditions UNKNOWN Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows NORMAL, the system is normal. If the judgment result shows INCOMPLETE or UNKNOWN, idle the engine for 3 minutes.
13. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
14. Check the judgment result [C]. HINT: If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows NORMAL, the system is normal.
15. If the test result is INCOMPLETE or UNKNOWN and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(ref-394619-S02527777542011040800000) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

1. CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - ECM) Disconnect the air fuel ratio sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition B7-1 (HA1A) - B39-22 (HA1A) Always Below 1 ohms B7-3 (A1A+) - B39-126 (A1A+) Always Below 1 ohms B7-4 (A1A-) - B39-125 (A1A-) Always Below 1 ohms B8-1 (HA2A) - B39-20 (HA2A) Always Below 1 ohms B8-3 (A2A+) - B39-103 (A2A+) Always Below 1 ohms B8-4 (A2A-) - B39-102 (A2A-) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition B7-1 (HA1A) or B39-22 (HA1A) - Body ground Always 10 kohms or higher B7-3 (A1A+) or B39-126 (A1A+) - Body ground Always 10 kohms or higher B7-4 (A1A-) or B39-125 (A1A-) - Body ground Always 10 kohms or higher B8-1 (HA2A) or B39-20 (HA2A) - Body ground Always 10 kohms or higher B8-3 (A2A+) or B39-103 (A2A+) - Body ground Always 10 kohms or higher B8-4 (A2A-) or B39-102 (A2A-) - Body ground Always 10 kohms or higher Reconnect the air fuel ratio sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (AIR FUEL RATIO SENSOR - ECM) OK: Go to next step
2. REPLACE AIR FUEL RATIO SENSOR Replace the air fuel ratio sensor. Refer to «REMOVAL»(ref-394792-S22742457202011040800000) . NEXT: Go to next step
3. CHECK WHETHER DTC OUTPUT RECURS Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear the DTCs (even if no DTCs are stored, perform the Clear DTC procedure). Refer to «DTC CHECK / CLEAR»(ref-394619-S02527777542011040800000) . Start the engine. Allow the engine to idle for 2 minutes. Enter the following menus: Powertrain / Engine / Utility / All Readiness. Input the DTC: P2238, P2241, P2239, P2242, P2252, P2255, P2253 or P2256. Check the DTC judgment result. Result Result Proceed to NORMAL (DTC is not output) A ABNORMAL (DTCs P2238, P2241, P2239, P2242, P2252, P2255, P2253 and/or P2256 are output) B B --> See step 4 A --> END
4. REPLACE ECM. Refer to «REMOVAL»(ref-394792-S25581811582011040800000)

Refer to Checking Monitor Status. Refer to CHECKING MONITOR STATUS .

Scheme 392

Note. The Evaporative System Check (Automatic Mode) consists of 5 steps performed automatically by the Techstream. It takes a maximum of approximately 18 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 fuel temperature below 35°C (95°F).

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch ON and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure). Refer to «DTC CHECK / CLEAR»(ref-394619-S02527777542011040800000) .
4. Turn the ignition switch off and wait for 30 seconds.
5. Turn the ignition switch ON and turn the Techstream on.
6. Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode [A].
7. After the "Evaporative System Check" is completed, check for All Readiness by entering the following menus: Powertrain / Engine / Trouble Codes / Pending.
8. Read the pending DTC [B].
9. If a pending DTC is output, the system is malfunctioning. HINT: If a pending DTC is not output, perform the following procedure.
10. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
11. Input the DTC: P2420.
12. 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 driving pattern after confirming DTC enabling conditions UNKNOWN Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows NORMAL, the system is normal. If the judgment result shows INCOMPLETE or UNKNOWN, perform step [B].
13. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
14. Check the judgment result. HINT: If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows NORMAL, the system is normal.
15. If the test result is INCOMPLETE or UNKNOWN and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(ref-394619-S02527777542011040800000) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

Scheme 393

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the Clear DTC procedure). Refer to «DTC CHECK / CLEAR»(ref-394619-S02527777542011040800000) .
4. Turn the ignition switch off and wait for at least 30 seconds.
5. Turn the ignition switch to ON and turn the Techstream on [A].
6. Start the engine.
7. Idle the engine for 10 minutes or more.
8. Enter the following menus: Powertrain / Engine / Trouble Codes / Pending.
9. Read the pending DTC [B].
10. If a pending DTC is output, the system is malfunctioning. HINT: If a pending DTC is not output, perform the following procedure.
11. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
12. Input the DTC: P2610.
13. 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 driving pattern after confirming DTC enabling conditions UNKNOWN Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows NORMAL, the system is normal. If the judgment result shows INCOMPLETE or UNKNOWN, perform step [B] again.
14. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
15. Check the judgment DTC. HINT: If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows NORMAL, the system is normal.
16. If the test result is INCOMPLETE or UNKNOWN and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(ref-394619-S02527777542011040800000) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

1. REPLACE ECM Replace the ECM. Refer to «REMOVAL»(ref-394792-S25581811582011040800000) . NEXT: Go to next step
2. CHECK WHETHER DTC OUTPUT RECURS Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-394619-S02527777542011040800000) . Start the engine and wait for 10 minutes or more. Enter the following menus: Powertrain / Engine / Trouble Codes / Pending. If no pending DTC is displayed, the repair has been successfully completed. NEXT --> END

Refer to Checking Monitor Status. Refer to CHECKING MONITOR STATUS .

HINT

Performing this confirmation pattern will activate the air fuel ratio sensor response monitor.

Scheme 394

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch ON.
3. Turn the Techstream on.
4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure). Refer to «DTC CHECK / CLEAR»(ref-394619-S02527777542011040800000) .
5. Turn the ignition switch off.
6. Turn the ignition switch ON and turn the Techstream on.
7. Enter the following menus: Powertrain / Engine / Monitor / O2 Sensor / Details.
8. Check that the RES RATE B1S1 and RES RATE B2S1 are Incomplete.
9. Start the engine and warm it up (until the engine coolant temperature is 75°C (167°F) or higher) [A].
10. Drive the vehicle at a constant speed of between 47 and 62 mph (75 and 100 km/h) for 10 minutes [B].
11. Check the monitor result values on Techstream by entering the following menus: Powertrain / Engine / Monitor / O2 Sensor / Details / RES RATE B1S1 and RES RATE B2S1.
12. If the values indicated on the Techstream do not change, perform Readiness Monitor Drive Pattern for the air fuel ratio sensor and heated oxygen sensor. Refer to «READINESS MONITOR DRIVE PATTERN»(ref-394619-S28323790032011040800000) .
13. Note the value of the Monitor Result.
14. Enter the following menus: Powertrain / Engine / Trouble Codes / Pending.
15. Read the pending DTC [C].
16. If a pending DTC is output, the system is malfunctioning. HINT: If a pending DTC is not output, perform the following procedure.
17. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
18. Input the DTC: P2A00 or P2A03.
19. 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 driving pattern after confirming DTC enabling conditions UNKNOWN Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows NORMAL, the system is normal. If the judgment result shows INCOMPLETE or UNKNOWN, perform step [B] again.
20. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
21. Check the judgment result. HINT: If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows NORMAL, the system is normal.
22. If the test result is INCOMPLETE or UNKNOWN and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(ref-394619-S02527777542011040800000) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2A00 AND/OR P2A03) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Trouble Codes. Read the DTCs. Result Result Proceed to DTC P2A00 and/or P2A03 are output A DTC P2A00 and/or P2A03 and other DTCs are output B HINT: If any DTCs other than P2A00 and/or P2A03 are output, troubleshoot those DTCs first. B --> See step 9 A: Go to next step
2. INSPECT AIR FUEL RATIO SENSOR (HEATER RESISTANCE) Disconnect the air fuel ratio sensor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 (HA1A) - 2 (+B) 20°C (68°F) 1.8 to 3.4 ohms 1 (HA1A) - 4 (A1A-) Always 10 kohms or higher 1 (HA2A) - 2 (+B) 20°C (68°F) 1.8 to 3.4 ohms 1 (HA2A) - 4 (A2A-) Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Component without harness connected (Air Fuel Ratio Sensor) *2 Bank 1 *3 Bank 2 Reconnect the air fuel ratio sensor connector. NG --> See step 10 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - ECM) Disconnect the air fuel ratio sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition B7-1 (HA1A) - B39-22 (HA1A) Always Below 1 ohms B7-3 (A1A+) - B39-126 (A1A+) Always Below 1 ohms B7-4 (A1A-) - B39-125 (A1A-) Always Below 1 ohms B8-1 (HA2A) - B39-20 (HA2A) Always Below 1 ohms B8-3 (A2A+) - B39-103 (A2A+) Always Below 1 ohms B8-4 (A2A-) - B39-102 (A2A-) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition B7-1 (HA1A) or B39-22 (HA1A) - Body ground Always 10 kohms or higher B7-3 (A1A+) or B39-126 (A1A+) - Body ground Always 10 kohms or higher B7-4 (A1A-) or B39-125 (A1A-) - Body ground Always 10 kohms or higher B8-1 (HA2A) or B39-20 (HA2A) - Body ground Always 10 kohms or higher B8-3 (A2A+) or B39-103 (A2A+) - Body ground Always 10 kohms or higher B8-4 (A2A-) or B39-102 (A2A-) - Body ground Always 10 kohms or higher Reconnect the ECM connector. Reconnect the air fuel ratio sensor connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (AIR FUEL RATIO SENSOR - ECM) OK: Go to next step
4. PERFORM CONFIRMATION DRIVING PATTERN Perform the confirmation driving pattern. NEXT: Go to next step
5. CHECK WHETHER DTC OUTPUT RECURS (DTC P2A00 AND/OR P2A03) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Utility / All Readiness. Input the DTC: P2A00 or P2A03. Check the DTC judgment result. Result Result Proceed to ABNORMAL (DTC P2A00 and/or P2A03 are output) A NORMAL (DTC is not output) B B --> See step 11 A: Go to next step
6. REPLACE AIR FUEL RATIO SENSOR Replace the air fuel ratio sensor. Refer to «REMOVAL»(ref-394792-S22742457202011040800000) . NEXT: Go to next step
7. PERFORM CONFIRMATION DRIVING PATTERN Perform the confirmation driving pattern. NEXT: Go to next step
8. CHECK WHETHER DTC OUTPUT RECURS (DTC P2A00 AND/OR P2A03) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Utility / All Readiness. Input the DTC: P2A00 or P2A03. Check the DTC judgment result. Result Result Proceed to NORMAL (DTC is not output) A ABNORMAL (DTC P2A00 and/or P2A03 are output) B B --> See step 12 A --> END
9. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-394619-S37978292982011040800000)
10. REPLACE AIR FUEL RATIO SENSOR. Refer to «REMOVAL»(ref-394792-S22742457202011040800000)
11. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-394619-S06103702132011040800000)
12. REPLACE ECM. Refer to «REMOVAL»(ref-394792-S25581811582011040800000)

Scheme 395

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the Clear DTC procedure). Refer to «DTC CHECK / CLEAR»(ref-394619-S02527777542011040800000) .
4. Turn the ignition switch off and wait for at least 30 seconds.
5. Turn the ignition switch to ON and turn the Techstream on [A].
6. Wait 5 seconds or more.
7. Enter the following menus: Powertrain / Engine / Trouble Codes.
8. Read the DTC [B].
9. If a DTC is output, the system is malfunctioning. HINT: If a DTC is not output, perform the following procedure.
10. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
11. Input the DTC: U0101.
12. 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 driving pattern after confirming DTC enabling conditions UNKNOWN Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU's memory limit HINT: If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows NORMAL, the system is normal. If the judgment result shows INCOMPLETE or UNKNOWN, perform step [B] again.
13. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
14. Check the judgment result. HINT: If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows NORMAL, the system is normal.
15. If the test result is INCOMPLETE or UNKNOWN and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(ref-394619-S02527777542011040800000) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

Scheme 396

Scheme 397

1. CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC U0101) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Trouble Codes. Read the DTCs. Result Result Proceed to DTC U0101 is output A DTC U0101 and other DTCs are output B HINT: If any DTCs other than U0101 are output, troubleshoot those DTCs first. B --> See step 6 A: Go to next step
2. INSPECT ECU POWER SOURCE CIRCUIT (TCM POWER SOURCE) Disconnect the TCM connector. Turn the Ignition switch to ON. Measure the resistance according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition B40-1 (BATT) - B40-8 (E1) Always 11 to 14 V B40-18 (+B) - B40-8 (E1) Ignition switch ON 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to TCM) Reconnect the TCM connector. NG --> See step 7 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (ECM - TCM) Disconnect the TCM connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition B40-6 (CAN+) - B39-24 (CAN+) Always Below 1 ohms B40-7 (CAN-) - B39-1 (CAN-) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition B40-6 (CAN+) or B39-24 (CAN+) - Body ground Always 10 kohms or higher B40-7 (CAN-) or B39-1 (CAN-) - Body ground Always 10 kohms or higher Reconnect the ECM connector. Reconnect the TCM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - TCM) OK: Go to next step
4. REPLACE ECM Replace the ECM. Refer to «REMOVAL»(ref-394792-S25581811582011040800000) . NEXT: Go to next step
5. CHECK WHETHER DTC OUTPUT RECURS (DTC U0101) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Trouble Codes. Read the DTCs. Result Result Proceed to DTC is not output A DTC U0101 is output B B --> See step 8 A --> END
6. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-394619-S37978292982011040800000)
7. GO TO TCM POWER SOURCE CIRCUIT. Refer to «ECU Power Source Circuit»(ref-394810-S12870570732011040800000)
8. REPLACE TCM. Refer to «REMOVAL»(ref-394809-S34069827752011040800000)

RELATED DTCS

If any EVAP system DTCs are set, the malfunctioning area can be determined using the table below.

Scheme 398

Note. If the reference pressure difference between the first and second checks is greater than the specification, all the DTCs relating to the reference pressure (P043E, P043F, P2401, P2402 and P2419) are stored.

Scheme 399

TEXT IN ILLUSTRATION

HINT

The canister pressure sensor, the leak detection pump and the vent valve are built into the canister pump module.

Scheme 400

TEXT IN ILLUSTRATION

Note. In this vehicle's EVAP system, turning on the vent valve does not seal off the EVAP system. To check for leaks in the EVAP system, disconnect the air inlet vent hose and apply pressure from the atmospheric side of the canister.

While the engine is running, if a predetermined condition (closed-loop, etc.) is met, the purge VSV is opened by the ECM and stored fuel vapors in the canister are purged into the intake manifold. The ECM changes the duty cycle of the purge VSV to control purge flow volume.

The purge flow volume is also determined by the intake manifold pressure. Atmospheric pressure is allowed into the canister through the vent valve to ensure that the purge flow is maintained when negative pressure (vacuum) is applied to the canister.

The following 2 monitors run to confirm the appropriate EVAP system operation.

Scheme 401

Scheme 402

Scheme 403

1. Key-off monitor This monitor checks for EVAP (Evaporative Emission) system leaks and canister pump module malfunctions. The monitor starts 5 hours* after the ignition switch is turned off. At least 5 hours are required for the fuel to cool down to stabilize the EVAP pressure, thus making the EVAP system monitor more accurate. The leak detection pump creates negative pressure (vacuum) in the EVAP system and the pressure is measured. Finally, the ECM monitors for leaks from the EVAP system, and malfunctions in both the canister pump module and purge VSV based on the EVAP pressure. HINT: *: If the engine coolant temperature is not below 35°C (95°F) 5 hours after the ignition switch is turned off, the monitor check starts 2 hours later. If it is still not below 35°C (95°F) 7 hours after the ignition switch is turned off, the monitor check starts 2.5 hours later.
2. Purge flow monitor The purge flow monitor consists of the 2 monitors. The 1st monitor is conducted every time and the 2nd monitor is activated if necessary. The 1st monitor While the engine is running and the purge VSV is on (open), the ECM monitors the purge flow by measuring the EVAP pressure change. If negative pressure is not created, the ECM begins the 2nd monitor. The 2nd monitor The vent valve is turned off (open) and the EVAP pressure is measured. If the variation in the pressure is less than 0.5 kPa (3.75 mmHg), the ECM interprets this as the purge VSV being stuck closed, and illuminates the MIL and sets DTC P0441 (2 trip detection logic). Atmospheric pressure check: In order to ensure reliable malfunction detection, the variation between the atmospheric pressures, before and after conduction of the purge flow monitor, is measured by the ECM. TEXT IN ILLUSTRATION *1 EVAP Purge Flow *2 to Intake Manifold *3 ECM *4 Soak Timer *5 Purge VSV (on) *6 Fuel Cap *7 Canister Filter *8 Fuel Tank *9 Leak Detection Pump (off) *10 Canister Pressure Sensor *11 Reference Orifice (0.02 inch) *12 Refueling Valve *13 to Atmosphere *14 Vent Valve (off) *15 Canister Pump Module *16 Canister Component Operation Canister Contains activated charcoal to absorb EVAP (Evaporative Emissions) generated in fuel tank. Cut-off valve Located in fuel tank. Valve floats and closes when fuel tank is 100% full. Purge VSV (Vacuum Switching Valve) Opens or closes line between canister and intake manifold. ECM uses purge VSV to control EVAP purge flow. In order to discharge EVAP absorbed by canister to intake manifold, ECM opens purge VSV. EVAP discharge volume to intake manifold controlled by purge VSV duty cycle (current-carrying time) (Open: on; Closed: off). Refueling valve Controls EVAP pressure from fuel tank to canister. Valve consists of diaphragm, spring and restrictor (diameter: 0.08 inch.). When fuel vapor and pressure inside fuel tank increase, valve opens. While EVAP purged, valve closes and restrictor prevents large amount of vacuum from affecting pressure in fuel tank. Valve opens while refueling. Roll-over valve Located in fuel tank. Valve closes by its own weight when vehicle overturns to prevent fuel from spilling out. Soak timer Built into ECM. To ensure accurate EVAP monitor, measures 5 hours (+/-15 min) after ignition switch is turned off. This allows fuel to cool down, stabilizing EVAP pressure. When approximately 5 hours elapsed, ECM activates (Scheme 398) Canister pump module Consists of (a) to (d) below. Canister pump module cannot be disassembled. (a) Vent valve Vents and closes EVAP system. When ECM turns valve on, EVAP system is closed. When ECM turns valve off, EVAP system is vented. Negative pressure (vacuum) is created in EVAP system to check for EVAP leaks by closing purge VSV, turning on vent valve (closing it) and operating leak detection pump see scheme 50 (b) Canister pressure sensor Indicates pressure as voltage. ECM supplies regulated 5 V to canister pressure sensor, and uses feedback from sensor to monitor EVAP system pressure see scheme 51 (c) Leak detection pump Creates negative pressure (vacuum) in EVAP system for leak check. (d) Reference orifice Has opening with 0.02 inch diameter. Vacuum is produced through orifice by closing purge VSV, turning off vent valve and operating leak detection pump to monitor reference pressure. Reference pressure indicates small leak of EVAP. TEXT IN ILLUSTRATION *1 Canister Pump Module (Scheme 379) *2 Airflow *3 Condition: Purge Flow *4 Condition: Leak Check *5 Vent Valve: off (vent) *6 to Canister Filter (Atmosphere) *7 Canister *8 Reference Orifice (0.02 Inch) *9 From Refueling Valve *10 Canister Pressure Sensor *11 Leak Detection Pump: off *12 Vent Valve: on (closed) *13 Leak Detection Pump: on

Scheme 404

HINT

After a repair, check Monitor Status by performing the Key-Off Monitor Confirmation and Purge Flow Monitor Confirmation described below.

1. KEY-OFF MONITOR CONFIRMATION Preconditions The monitor will not run unless: The vehicle has been driven for 10 minutes or more (in a city area or on a freeway). The fuel tank is less than 90% full. The altitude is less than 8000 ft. (2400 m). The engine coolant temperature is between 4.4°C and 35°C (40°F and 95°F). The intake air temperature is between 4.4°C and 35°C (40°F and 95°F). The vehicle remains stationary (the vehicle speed is 0 mph [0 km/h]). Monitor Conditions Allow the engine to idle for at least 5 minutes. Turn the ignition switch off and wait for 6 hours (8 or 10.5 hours). HINT: Do not start the engine until checking Monitor Status. If the engine is started, the steps described above must be repeated. Monitor Status Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Monitor / Evaporative System. Check the Monitor Status displayed on the Techstream. HINT: If Incomplete is displayed, the monitor is not completed. Make sure that the preconditions have been met, and perform the Monitor Conditions again.
2. PURGE FLOW MONITOR CONFIRMATION (P0441) HINT: Perform this monitor confirmation after the Key-Off Monitor Confirmation shows complete. Preconditions The monitor will not run unless: The vehicle has been driven for 10 minutes or more (in a city area or on a freeway). The engine coolant temperature is between 4.4°C and 35°C (40°F and 95°F). The intake air temperature is between 4.4°C and 35°C (40°F and 95°F). Monitor Conditions Release the pressure from the fuel tank by removing and reinstalling the fuel cap. Warm the engine up until the engine coolant temperature reaches more than 75°C (167°F). Increase the engine speed to 3000 rpm once. Allow the engine to idle and turn the A/C switch on for 1 minute. Monitor Status Turn the ignition switch off (if ON or if the engine is running). Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Monitor / Evaporative System. Check the Monitor Status displayed on the Techstream. HINT: If Incomplete is displayed, the monitor is not completed. Make sure that the preconditions have been met, and perform the Monitor Conditions again.

Refer to Checking Monitor Status. Refer to CHECKING MONITOR STATUS .