Honda CIVIC 10G 2016 Pgm Fi System Page 1

PGM-FI System Description - A/F Sensor/HO2S Feedback Air/Fuel Ratio Control
A
ir fuel ratio control is part of fuel injection control and comprises the steps of
:
Calculating basic injection amount from intake air flow amount and engine speed
Calculating air fuel ratio correction value from the oxygen density in the exhaust gas and reflecting the calculated values to the
injection amount
A
ir fuel ratio control stops feedback under the following conditions in order to maintain operational performance and catalytic
protection.
When starting the engine or during fuel increase after the engine is started
While the engine coolant is cold
During fuel increase under high load
During fuel increase at high engine speed
During fuel cut-off at deceleration
Air Fuel Ratio (A/F) Sensor (Sensor 1)
A
ir fuel ratio control performs fuel injection control based on the oxygen density detected in exhaust gas in order to bring the intake
mixture in the vicinity of a target air fuel ratio.
This high-precision air fuel ratio control is realized by detecting a correction value with an air fuel ratio (A/F) sensor (Sensor 1) and
then applying further correction with a secondary heated oxygen sensor (secondary HO2S) (Sensor 2).
The powertrain control module (PCM) supplies a current to the A/F sensor (Sensor 1), and monitors the current value which varies
with the oxygen density in the measuring chamber of the sensor
.
The current value is proportional to the air fuel ratio, therefore the PCM can calculate the air fuel ratio from the value of the current.
PGM-FI System Description - A/F Sensor/HO2S Feedback Air/Fuel Rat... http://techinfo.honda.com/rjanisis/pubs/sm/1/2/Contents/enu/61TBAD/...
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Contents Summary of Pgm Fi System

  • Page 1PGM-FI System Description - A/F Sensor/HO2S Feedback Air/Fuel Ratio Control Air fuel ratio control is part of fuel injection control and comprises the steps of: Calculating basic injection amount from intake air flow amount and engine speed Calculating air fuel ratio correction value from the oxygen
  • Page 2Secondary HO2S (Sensor 2) The secondary heated oxygen sensor (secondary HO2S) (Sensor 2) detects the oxygen density in the exhaust gas passing through the catalyst and outputs it to the powertrain control module (PCM) to enable the high-precision air fuel ratio control, which cannot be realized only
  • Page 3PGM-FI System Description - Components cardiagn.com A MIS-FUEL INHIBIT DEVICE B FUEL TANK VAPOR CONTROL VALVE C FUEL TANK D FUEL PRESSURE REGULATOR E FUEL PUMP F FUEL FILTER G EVAP CANISTER VENT SHUT VALVE H FTP SENSOR I EVAP CANISTER J FUEL INJECTOR K EVAP CANISTER PURGE VALVE L INTAKE AIR RESONATO
  • Page 4PGM-FI System Description - Components cardiagn.com A MIS-FUEL INHIBIT DEVICE and MAIN FLAP UNIT B FUEL TANK VAPOR CONTROL VALVE C FUEL TANK D FUEL PRESSURE REGULATOR E FUEL PUMP F FUEL FILTER G EVAP CANISTER VENT SHUT VALVE H FTP SENSOR I EVAP CANISTER J HIGH PRESSURE FUEL PUMP K FUEL INJECTOR L FU
  • Page 5Y PCV VALVE Z ECT SENSOR 1 AA KNOCK SENSOR AB CKP SENSOR AC IGNITION COIL AD VTC OIL CONTROL SOLENOID VALVE A AE VTC OIL CONTROL SOLENOID VALVE B AF ROCKER ARM OIL CONTROL VALVE AG A/F SENSOR (SENSOR 1) AH SECONDARY HO2S (SENSOR 2) AI TWC AJ TURBOCHARGER AK TURBOCHARGER WASTEGATE CONTROL AL TURBOCHA
  • Page 6PGM-FI System Description - Components cardiagn.com A MIS-FUEL INHIBIT DEVICE B FUEL TANK VAPOR CONTROL VALVE C FUEL TANK D FUEL PRESSURE REGULATOR E FUEL PUMP F FUEL FILTER G EVAP CANISTER VENT SHUT VALVE H FTP SENSOR I EVAP CANISTER J HIGH PRESSURE FUEL PUMP K FUEL INJECTOR L FUEL RAIL PRESSURE SE
  • Page 7AA CKP SENSOR AB IGNITION COIL AC VTC OIL CONTROL SOLENOID VALVE A AD VTC OIL CONTROL SOLENOID VALVE B AE A/F SENSOR (SENSOR 1) AF TWC AG SECONDARY HO2S (SENSOR 2) AH TURBOCHARGER AI TURBOCHARGER WASTEGATE CONTROL AJ TURBOCHARGER BYPASS CONTROL VALVE ACTUATOR AK TURBOCHARGER BYPASS CONTROL SOLENOID
  • Page 8PGM-FI System Description - Electronic Control The powertrain control module (PCM) consists of a CPU memory (storage unit) and inputs/outputs that control the fuel injection, injection timing, and electronic throttle control system (ETCS). Fail-Safe Function When a malfunction occurs in the signal f
  • Page 9PGM-FI System Description - Electronic Control The powertrain control module (PCM) consists of a CPU memory (storage unit) and inputs/outputs that control the fuel injection, injection timing, and electronic throttle control system (ETCS). Fail-Safe Function When a malfunction occurs in the signal f
  • Page 10PGM-FI System Description - Fuel Cut-off Control Recovery engine speed from fuel cut-off during deceleration After warming up, during deceleration with the throttle valve slightly opened from the fully closed position, the powertrain control module (PCM) stops the fuel injection when the engine spee
  • Page 11PGM-FI System Description - Fuel Cut-off Control Recovery engine speed from fuel cut-off during deceleration After warming up, during deceleration with the throttle valve slightly opened from the fully closed position, the powertrain control module (PCM) stops the fuel injection when the engine spee
  • Page 12PGM-FI System Description - Ignition Timing Control The powertrain control module (PCM) contains the memory for basic ignition timing at various engine speeds and manifold absolute pressures. It also adjusts the timing according to engine coolant temperature and intake air temperature. cardiagn.com
  • Page 13PGM-FI System Description - Injection Control Fuel Injection Amount The fuel injection amount is determined by adding correction values to a basic injection amount. The powertrain control module (PCM) controls the amount of fuel injection by the length of time the injector is energized. cardiagn.com
  • Page 14cardiagn.com CKP Sensor Regularly continuous teeth except for the one position on the CKP pulse plate passes over the CKP sensor, a pulse signal is delivered to the PCM. CMP Sensor A Every time one of the three protrusions of the pulse plate attached to the intake camshaft passes over camshaft posit
  • Page 15Fuel Injector (Direct Fuel-Injected Engine) The fuel injectors use multiple nozzles to inject high pressure fuel into the combustion chamber. Providing few injection ports promotes a finer fuel spray and improved fuel consumption by reducing fuel adherence to the top surface of the piston, reduction
  • Page 16cardiagn.com MAF Sensor/IAT Sensor 1 (1.5 L Engine (except Si)) Mass air flow (MAF) sensor/intake air temperature (IAT) sensor 1 contains a hot wire sensor, a cold wire sensor, and a thermistor. The sensor is in the intake air passage. The resistance of the hot wire, the cold wire, and the thermisto
  • Page 17MAF Sensor/IAT Sensor 1 (2.0 L Engine (Type-R)) Mass air flow (MAF) sensor/intake air temperature (IAT) sensor 1 contains a hot wire, a cold film, and a thermistor. The sensor is in the intake air passage. The resistance of the hot wire, the cold film, and the thermistor changes due to intake air te
  • Page 18PGM-FI System Description - On-Board Snapshot Overview For an easy analysis of problems caused by engine stalls and starting problems, the powertrain control module (PCM) uses an on-board snapshot to record the operational conditions at the time of engine stalls and engine starting problems. There a
  • Page 19The preconditions for recording an on-board snapshot when engine does not start are as shown below, and when engine starting problems occur under these preconditions, the parameters related to the engine starting problems are memorized in the PCM. cardiagn.com
  • Page 20The precondition is: After 1 drive cycle, after PCM reset, or 12 volt battery terminal disconnection. On-board snapshot of Engine stalls is not stored. Not during SCS short The on-board snapshot when engine does not start has the timer for the evaluation of starting problems as a factor is variable,
  • Page 21cranking (engine speed 500 rpm or lower) takes longer than the specified time (timer for the evaluation of starting problems: variable according to the conditions at the time of start). If it is determined that a starting problem exists, the parameters related to the starting problem (for 9 seconds
  • Page 22cardiagn.com On-board snapshot of “engine starts but stalls immediately”: An on-board snapshot is taken when an engine stall occurs within 5 seconds after the engine start, although the engine started (engine speed 500 rpm or higher) with cranking (engine speed 500 rpm or lower) within the specified
  • Page 23cardiagn.co
  • Page 24PGM-FI System Description - REV Match System Overview When shifting, optimum engine speed control is performed by the PCM to reduce clutch engagement shock and to reduce driver's shift operation load. And the control is also performed when shifting after coasting that is difficult to fit the engine
  • Page 25cardiagn.com When the REV match system fails, the following indicator comes on in the gauge control module (multi-information display). If the indicator comes on, check for the DTC of the PGM-FI system and the brake system (VSA system). When the REV match system is turned off by the user customizati
  • Page 26Injector Removal and Installation Special Tool Required Image Description/Tool Number Tool, Injector Seal Sizing 070AG-RPY0100 cardiagn.com Pick Up Tool 070AC-5A0A100 Flammable - Keep Fire Away NOTE: Where icon is shown, click for further information. Refer to the Fuel and Emissions Systems Service
  • Page 27cardiagn.com Detailed information, notes and precautions Replace 1. Fuel Pressure - Relieve 2. Throttle Body - Move NOTE: Do not disconnect the water bypass hoses. Do not bend the water bypass hoses excessively. 3. Intake Manifold - Remove 4. Joint Pipe Bracket - Remove
  • Page 28cardiagn.co
  • Page 295. Fuel Joint Pipe - Remove 6. Fuel Rail Bracket - Remove 7. Fuel Rail Insulator - Remove 8. Fuel Rail and Injector - Remove 1. Carefully remove the fuel rail with the injectors straight from the cylinder head. NOTE: If the injector remains on the cylinder head, carefully remove the injector straigh
  • Page 30Where icon is shown, click for further information. Refer to the Fuel and Emissions Systems Service Precautions before disconnecting the fuel line. When replacing the injector, you must replace all injectors on the fuel rail as a set and the fuel joint pipe. Failure to do so will cause poor engine p
  • Page 31NOTE: Do not wipe off the tip area (A) of the injector as it may be damaged. If the tip of the injector is dirty or clogged, it must be replaced. The injectors cannot be cleaned. 1. Use compressed air to ensure that there are no dust or debris around the ring (B). 2. With a paper towel, carefully wi
  • Page 327. Set the seal to the bottom side of the groove (A) as shown. 8. Slide the sizing tool of the injector seal sizing tool onto the seal (A) until tools touch to the injector stepped surface (B) with turning 180°, then hold the tools to reform the seal for 1 second or more. NOTE: When sliding the sizi
  • Page 3310. Install the back-up ring (A) and the O-ring (B) on the injector (C). NOTE: Set the direction of the back-up ring as shown. Check that the back-up ring sets correctly after installation. 11. Install the injector onto the fuel rail (D) with the clip (E). NOTE: When installing the injector, be sure
  • Page 346. Fuel Leak - Check 7. Fuel Rail Insulator - Install 8. Intake Manifold - Install 9. Throttle Body - Install 10.PCM - Fuel Learn (When Replacing) cardiagn.com
  • Page 35Injector Removal and Installation Flammable - Keep Fire Away NOTE: Refer to the Fuel and Emissions Systems Service Precautions before disconnecting the fuel line. 1 cardiagn.com Replace 1. Fuel Pressure - Relieve
  • Page 362. Connector (Injector) - Disconnect cardiagn.com
  • Page 373. Quick-Connector Fitting Cover - Remove 4. Quick-Connector Fitting - Disconnect 5. Fuel Rail and Injector - Remove 6. Injector - Remove cardiagn.com Flammable - Keep Fire Away NOTE: Where icon is shown, click for further information. Refer to the Fuel and Emissions Systems Service Precautions befo
  • Page 38Detailed information, notes and precautions cardiagn.com Torque: N·m (kgf·m, lbf·ft) Replace *1 Coat the clean engine oil *2 O-rings (black) *3 O-rings (brown) 1. Injector - Install 2. Fuel Rail and Injector - Install NOTE: Carefully install the fuel rail and the injectors to the cylinder head. 3. Q
  • Page 394. Quick-Connector Fitting Cover - Install cardiagn.com
  • Page 405. Connector (Injector) - Connect 6. Fuel Leak - Check 1. Turn the vehicle to the ON mode, but do not start the engine. After the fuel pump runs for about 2 seconds, the fuel line will be pressurized. Repeat this two or three times, then check for fuel leakage. cardiagn.com
  • Page 41Injector Removal and Installation Special Tool Required Image Description/Tool Number Pick Up Tool 070AC-5A0A100 cardiagn.com Injector Seal Installer Kit 070AG-5A0A100 Flammable - Keep Fire Away NOTE: Refer to the Fuel and Emissions Systems Service Precautions before disconnecting the fuel line. Whe
  • Page 422. Throttle Body - Move NOTE: Do not disconnect the water bypass hoses. Do not bend the water bypass hoses excessively. 3. Intake Manifold Bracket - Remove cardiagn.com 4. Intake Manifold - Remove 5. High Pressure Fuel Pump Cover - Remove
  • Page 431. Disconnect the quick-connect fitting (A). 2. Remove the high pressure fuel pump cover (B). cardiagn.com 6. Fuel Joint Pipe - Remove 7. Fuel Rail and Injector - Remove
  • Page 441. Remove the bracket (A). 2. Disconnect the connectors (B). 3. Remove the fuel rail mounting bolts (C) and nuts (D). 4. Carefully remove the fuel rail (E) with the injectors straight from the cylinder head. NOTE: If the injector remains on the cylinder head, carefully remove the injector straight f
  • Page 453. Using the pick up tool (A), carefully remove the seal (B) from the injector. cardiagn.com Flammable - Keep Fire Away NOTE: Refer to the Fuel and Emissions Systems Service Precautions before disconnecting the fuel line. When replacing the injector, you must replace all injectors on the fuel rail a
  • Page 463. Quickly push a new seal (A) down to the groove (B) of the injector using the seal guide tool (C) and the seal installer (D). 4. Joint the sizing tools (A), then slide them as a set onto the seal (B) until tools touch to the injector stepped surface (C) as shown, and hold the tools to reform the s
  • Page 471. Install a new back-up ring (A) and a new O-ring (B) on the injector (C). NOTE: Set the direction of the back-up ring as shown Check that the back-up ring sets correctly after installation. 2. Coat the O-ring with clean engine oil, then install the injector onto the fuel rail (D) with a new clip (
  • Page 481. Install the high pressure fuel pump cover (A). NOTE: The cover will be reinstalled after the fuel leak check. 2. Connect the quick-connect fitting (B). cardiagn.com 6. Fuel Leak - Check