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Electronic Fuel Injection Service & Diagnostics

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BRIGGS & STRATTON CUSTOMER EDUCATION ELECTRONIC FUEL INJECTION SERVICE & DIAGNOSTICS VANGUARD™ 810 EFI BIG BLOCKTM EFI Contents Contents Section 1 General Information Oxygen Sensor Caution Information................................... 2 P0131/P0132 ............................... 19-21 Common Abbreviations............................. 3 PE System Lean Wire color Abbreviations ........................... 4 P0174........................................... 22 General Diagnostic Aids............................ 5-8 Fuel Injector A and B Mil Blink Diagnostic Trouble Codes .......... 6 P0201/P0202 ............................... 23-24 On-Board Diagnostic (OBD) System Check 6 Fuel Pump Relay 490000 Scanning for Diagnostic Trouble Codes ... 6-8 P0230/P0232 ............................... 25-26 Tools Needed............................................ 9 Fuel Pump Relay 610000 Service Precautions.................................. 10 P0230/P0232 ............................... 27-31 General Circuit testing .............................. 11-12 Crank Position Sensor Troubleshooting with a DVOM .................. 12 P0336/P0337 ............................... 32-33 Troubleshooting with a Test Light.............. 12 Ignition Coil A and B Troubleshooting with a Noid Light............. 12 P0351/P0352 ............................... 34-35 Wiring........................................................ 13-14 Idle Air Control Model 490000 Component Locator........... 16 P0505........................................... 36-37 Model 610000 Component Locator........... 17 System Voltage P0562/P0563 ............................... 38-39 Fuel and Air Metering System Section 2 Malfunction Indicator Lamp Fuel Supply Components ......................... 2-3 P0650........................................... 40-41 ECM Modes of Operation ......................... 2 Closed Loop Control ................................. 2 Section 3b Diagnostic Trouble Codes Fuel Pressure Relief Procedure................ 4 Scan Diagnostics Fuel Rail Assembly.................................... 5 Oxygen Sensor Heater Fuel Injectors ............................................ 6 P0031/P0032 ............................... 2-4 Diaphragm Lift Pump Model 490000 ........ 7-8 Manifold Absolute Pressure Sensor Electric Lift pump for Model 610000 ......... 9-10 P0107/P0108 ............................... 5-7 Fuel Pump Module.................................... 11 Manifold Air Temperature Sensor Throttle Body Assembly ............................ 12 P0112/P0113 ............................... 8-10 Fuel Flow diagrams................................... 13-14 Engine Head Temperature Sensor P0117/P0118................................ 11-13 Section 3 Diagnostic Trouble Codes Throttle Position Sensor 490000 ECM Connector Pin-Out ........................... 2-3 P0122/P0123 ............................... 14-16 EFI System Diagram Model 490000......... 4-5 Throttle Position Sensor 610000 Model 490000 Engine to Chassis diagrams 6-7 P0122/P0123 ............................... 17-19 EFI System Diagram Model 610000......... 8-9 Oxygen Sensor Model 610000 Engine to Chassis diagram 10 P0131/P0132 ............................... 20-22 Fuse/Relay box component locations...... 11 PE System Lean Diagnostic Trouble Codes List ................ .. 12 P0174........................................... 23 Verifying the ECM is Powering Up............ 13 Fuel Injector A and B P0201/P0202 ............................... 24-25 Section 3a Diagnostic Trouble Codes Fuel Pump Relay 490000 Non-Scan Diagnostics P0230/P0232 ............................... 26-27 Oxygen Sensor Heater Fuel Pump Relay 610000 P0031/P0032 ............................... 2-3 P0230/P0232 ............................... 28-30 Manifold Absolute Pressure Sensor Crank Position Sensor P0107/P0108 ............................... 4-6 P0336/P0337 ............................... 31-32 Manifold Air Temperature Sensor Ignition Coil A and B P0112/P0113 ............................... 7-9 P0351/P0352 ............................... 33-34 Engine Head Temperature Sensor Idle Air Control P0117/P0118................................ 10-12 P0505........................................... 35-36 Throttle Position Sensor 490000 System Voltage P0122/P0123 ............................... 13-15 P0562/P0563 ............................... 37-38 Throttle Position Sensor 610000 Malfunction Indicator Lamp P0122/P0123 ............................... 16-18 P0650........................................... 39-40 Contents Contents Section 4 Symptoms Introduction to Symptoms ......................... 2 Engine will NOT Crank.............................. 3 Engine Cranks But Will NOT Start............ 4-5 Hard Start Symptoms ............................... 6-7 Engine Has Low Power Output................. 8-9 Engine Hunting and Surging..................... 10-11 Possible Symptoms with ECM Connectors 12-13 General Information Section 1 - 1 Contents Section 1 General Information Caution Information................................... 2 Common Abbreviations............................. 3 Wire color Abbreviations ........................... 4 General Diagnostic Aids............................ 5-8 Mil Blink Diagnostic Trouble Codes .......... 6 On-Board Diagnostic (OBD) System Check 6 Scanning for Diagnostic Trouble Codes ... 6-8 Tools Needed............................................ 9 Service Precautions.................................. 10 General Circuit testing .............................. 11-12 Troubleshooting with a DVOM .................. 12 Troubleshooting with a Test Light.............. 12 Troubleshooting with a Noid Light............. 12 Wiring........................................................ 13-14 Model 490000 Component Locator........... 16 Model 610000 Component Locator........... 17 Section 1 - 2 General Information •CAUTION To reduce the chance of personal injury and/or property damage, the following instructions must be carefully observed. Proper service and repair are important to the safety of the service technician and the safe, reli- able operation of all Electronic Fuel Injection (EFI) equipped engines. If part replacement is nec- essary, the part must be replaced with one of the same part number or with an equivalent part. Do not use a replacement part of lesser quality. The service procedures recommended and described in this service manual are effective meth- ods of performing service and repair. Some of these procedures require the use of tools specifi- cally designed for the purpose. Accordingly, anyone who intends to use a replacement part, service procedure, or tool which is not recommended by the manufacturer, must first determine that neither his safety nor the safe operation of the unit will be jeopardized by the replacement part, service procedure or tool se- lected. It is important to note that this manual contains various Cautions and Notices that must be care- fully observed in order to reduce the risk of personal injury during service or repair, or the possi- bility that improper service or repair may damage the unit or render it unsafe. It is also important to understand that these “Cautions” and “Notices” are not exhaustive, because it is impossible to warn of all the possible hazardous consequences that might result from failure to follow these instructions. All information, illustrations and specifications contained in this manual are based on the latest product information available at the time of publication approval. The right is reserved to make changes at any time without notice. General Information Section 1 - 3 Common Abbreviations BARO - BAROMETRIC PRESSURE IC - IGNITION CONTROL BAT - BATTERY, BATTERY POSITIVE IGN - IGNITION TERMINAL, BATTERY OR SYSTEM INJ - INJECTOR VOLTAGE I/O - INPUT/OUTPUT B+ - BATTERY POSITIVE kPa - KILOPASCAL CAN - CONTROLLER AREA NETWORK KV - KILOVOLTS CKT - CIRCUIT MAP - MANIFOLD ABSOLUTE PRESSURE CONN - CONNECTOR MAT - MANIFOLD AIR TEMPERATURE CYL - CYLINDER MFI - MULTIPORT FUEL INJECTION DEG - DEGREES MIL - MALFUNCTION INDICATOR LAMP DIAG - DIAGNOSTIC MSEC - MILLISECOND DLC - DATA LINK CONNECTOR MPR - MAIN POWER RELAY DTC - DIAGNOSTIC TROUBLE CODE N/C - NORMALLY CLOSED DVOM - DIGITAL VOLT OHMMETER N/O - NORMALLY OPEN ECM - ENGINE CONTROL MODULE OBD - ON-BOARD DIAGNOSTIC EHT - ENGINE HEAD TEMPERATURE OPT - OPTIONAL SENSOR PWM - PULSE WIDTH MODULATION EI - ELECTRONIC IGNITION RAM - RANDOM ACCESS MEMORY EFI - ELECTRONIC FUEL INJECTION REF HI - REFERENCE HIGH EMI - ELECTROMAGNETIC INTER- FERENCE REF LO - REFERENCE LOW ENG - ENGINE ROM - READ ONLY MEMORY EOP - ENGINE OIL PRESSURE SPN - SUSPECT PARAMETER NUMBER EST - ELECTRONIC SPARK TIMING SW - SWITCH E-STOP- EMERGENCY STOP TAC - THROTTLE ACTUATOR CONTROL FMI - FAILURE MODE INDICATOR TACH - TACHOMETER GND - GROUND TERM - TERMINAL GOV - GOVERNOR TP - THROTTLE POSITION GPH - GALLONS PER HOUR TPS - THROTTLE POSITION SENSOR O2 - HEATED OXYGEN SENSOR V - VOLTS HG - INCHES OF MERCURY VAC - VACUUM IAC - IDLE AIR CONTROL WOT - WIDE OPEN THROTTLE Section 1 - 4 General Information Wire Color Abbreviations ABBREVIATION MAIN COLOR TRACER COLOR BLK - BLACK – BLK/WHT - BLACK / WHITE BLU - BLUE – BLU/BRN - BLUE / BROWN BLU/YEL - BLUE / YELLOW BRN - BROWN – GRN - GREEN – GRN/WHT - GREEN / WHITE GRY - GREY – GRY/BLK - GREY / BLK LT.BLU - LIGHT BLUE – LT.BLU/BLK - LIGHT BLUE / BLACK LT.BLU/WHT - LIGHT BLUE / WHITE LT.GRN - LIGHT GREEN – ORG - ORANGE – ORG/BLK - ORANGE / BLACK ORG/WHT - ORANGE / WHITE PNK - PINK – PNK/BLK - PINK / BLACK RED - RED – RED/WHT - RED / WHITE TAN
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