2. Confidential | AA-AS/xx | 7/8/2015 | © Robert Bosch GmbH 2015 All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Automotive Service Solutions 1

3. Confidential | AA-AS/xx | 7/8/2015 | © Robert Bosch GmbH 2015 All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Automotive Service Solutions 2 Evap problems have been around for a long time Not all Evaporative Emission systems are the same Test for Evaporative systems can be different year by year How are you testing them?

4. Confidential | AA-AS/xx | 7/8/2015 | © Robert Bosch GmbH 2015 All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Automotive Service Solutions Fuel Bowl Vent Line Purge Valve Activation Line What does an EVAP system do ? When were EVAP systems first put on cars ? How does it do this ?

5. Confidential | AA-AS/xx | 7/8/2015 | © Robert Bosch GmbH 2015 All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Automotive Service Solutions Check Engine Light EVAP System Typical “non-enhanced” EVAP system WHAT IS YOUR FIRST GUESS?

6. Confidential | AA-AS/xx | 7/8/2015 | © Robert Bosch GmbH 2015 All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Automotive Service Solutions Enhanced EVAP Phase-in 1996 ----- 20% 1997 ----- 40% 1998 ----- 90% 1999 ---- 100% Manufacturers with sales less than 10,000 vehicles per year were exempt until 1999 when 100% compliance was required.

7. Confidential | AA-AS/xx | 7/8/2015 | © Robert Bosch GmbH 2015 All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Automotive Service Solutions The typical non-enhanced EVAP system contains the following components: EVAP emission pressure control valve. Vented canister. Diagnostic switch EVAP purge solenoid.

8. Confidential | AA-AS/xx | 7/8/2015 | © Robert Bosch GmbH 2015 All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Automotive Service Solutions OBD II Evaporative Systems Non-Enhanced EVAP GAS CAP ? This system checks to see if purge occurred when purge was commanded. This system does not check for leaks. The PCM may use a “switch” or long term fuel trim to determine purge flow.

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10. Confidential | AA-AS/xx | 7/8/2015 | © Robert Bosch GmbH 2015 All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Automotive Service Solutions Enhanced EVAP Phase-in 1996 ----- 20% 1997 ----- 40% 1998 ----- 90% 1999 ---- 100% Manufacturers with sales less than 10,000 vehicles per year are exempt until 1999 when 100% compliance is required.

11. Confidential | AA-AS/xx | 7/8/2015 | © Robert Bosch GmbH 2015 All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Automotive Service Solutions How does an Non-Enhanced EVAP system work?

12. Confidential | AA-AS/xx | 7/8/2015 | © Robert Bosch GmbH 2015 All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Automotive Service Solutions Fuel Bowl Vent Line Ground 10.50 v 8.50 v 6.50 v 4.50 v 2.50 v 1.00 v 0.00 v EVAP Diagnostic Switch At approximately a 25% purge solenoid duty cycle, the normally closed vacuum switch contacts should open. The PCM interprets this as purge flow.

13. Confidential | AA-AS/xx | 7/8/2015 | © Robert Bosch GmbH 2015 All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Automotive Service Solutions The typical “Enhanced” EVAP System uses the following components: Evaporative system canister. Fuel tank pressure sensor. Canister purge solenoid. Canister vent solenoid. Service port. Fuel cap. Fuel level sensor

14. Confidential | AA-AS/xx | 7/8/2015 | © Robert Bosch GmbH 2015 All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Automotive Service Solutions Enhanced EVAP This monitor checks for both purge flow and system integrity (leakage). 0.040" diameter: most common from 1996-1999 (P0442) 0.020" diameter: phase-in during the 2000 and newer (P0456) Can you get a “P0442” code on a 2000 or newer vehicle ? OBD II Evaporative Systems

15. Confidential | AA-AS/xx | 7/8/2015 | © Robert Bosch GmbH 2015 All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Automotive Service Solutions Check Engine Light Do you see EVAP codes? How often does EVAP codes show up?

16. Confidential | AA-AS/xx | 7/8/2015 | © Robert Bosch GmbH 2015 All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Automotive Service Solutions TOP 10 CODES 2008 FROM THE CA BAR. TOP 10 CODES 2009 FROM THE CA BAR. P0325 Knock Sensor 1 Circuit Bank 1 Or Single Sensor P0420 Catalyst System Efficiency Below Threshold Bank 1 P0300 Random/Multiple Cylinder Misfire Detected P0171 System Too Lean Bank 1 P0442 Evaporative Emission System Leak Detected (small leak) P0401 Exhaust Gas Recirculation Flow Insufficient Detected P0174 System too Lean Bank 2 P0455 Evaporative Emission System Leak Detected (large leak) P0301 Cylinder 1 Misfire Detected P0128 Coolant Temperature Below Thermostat Regulating) P0325 Knock Sensor 1 Circuit Bank 1 Or Single Sensor P0420 Catalyst System Efficiency Below Threshold Bank 1 P0300 Random/Multiple Cylinder Misfire Detected P0171 System Too Lean Bank 1 P0401 Exhaust Gas Recirculation Flow Insufficient Detected P0174 System Too Lean Bank 2 P0455 Evaporative Emission System Leak Detected (large leak) P0442 Evaporative Emission system Leak Detected (small leak) P0301 Cylinder 2 Misfire Detected P1456 EVAP Leak

17. Confidential | AA-AS/xx | 7/8/2015 | © Robert Bosch GmbH 2015 All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Automotive Service Solutions How does an Enhanced EVAP system work?

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19. Confidential | AA-AS/xx | 7/8/2015 | © Robert Bosch GmbH 2015 All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Automotive Service Solutions Front Door Closed Back Door Open

20. Confidential | AA-AS/xx | 7/8/2015 | © Robert Bosch GmbH 2015 All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Automotive Service Solutions Front Door Closed Back Door Open

21. Confidential | AA-AS/xx | 7/8/2015 | © Robert Bosch GmbH 2015 All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Automotive Service Solutions Front Door Open Can it purge with a full tank of fuel?

22. Confidential | AA-AS/xx | 7/8/2015 | © Robert Bosch GmbH 2015 All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Automotive Service Solutions

23. Confidential | AA-AS/xx | 7/8/2015 | © Robert Bosch GmbH 2015 All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Automotive Service Solutions What does the PCM have to see before it can test the EVAP system? First, ALL the criteria needs to be met before the PCM can run the EVAP monitor. What does that mean?

24. Confidential | AA-AS/xx | 7/8/2015 | © Robert Bosch GmbH 2015 All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Automotive Service Solutions Pre-Conditioning Requirements; MIL must be off. Barometric Pressure exceeds 28 kPa. At start-up, IAT & ECT is between 45°F & 85°F. IAT is not more than 2°F greater than ECT. ECT is not more than 12° greater than IAT. Fuel tank level is between 26 & 74 %. The TPS is between 9 & 35 %. The EVAP solenoid is at 50% PWM within 65 seconds of engine run time

25. Confidential | AA-AS/xx | 7/8/2015 | © Robert Bosch GmbH 2015 All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Automotive Service Solutions Front Door Open

26. Confidential | AA-AS/xx | 7/8/2015 | © Robert Bosch GmbH 2015 All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Automotive Service Solutions Front Door Closed Fuel Tank Pressure Back Door Closed

27. Confidential | AA-AS/xx | 7/8/2015 | © Robert Bosch GmbH 2015 All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Automotive Service Solutions Back Door Open No Codes

28. Confidential | AA-AS/xx | 7/8/2015 | © Robert Bosch GmbH 2015 All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Automotive Service Solutions When testing an EVAP system you will need to know how to close the back door

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