On-Vehicle Inspection
FA20 FUEL: FUEL SYSTEM: ON-VEHICLE INSPECTION; 2013 MY FR-S [03/2012 -]
1. CHECK FUEL PUMP OPERATION AND INSPECT FOR FUEL LEAK
(a) Connect the Techstream to the DLC3.
(1) Turn the ignition switch to ON.
NOTICE:
Do not start the engine.
(2) Turn the Techstream on.
(3) Enter the following menus: Power train / Engine / Active Test / Control the Fuel Pump Speed.
(b) Check the fuel pump operation.
(1) Check for pressure in the fuel inlet tube from the fuel line. Check that sound of fuel flowing in the fuel tank can be heard.
If no sound can be heard, check the EFI MAIN 1 relay, fuel pump, ECM and wiring connector.
(c) Inspect for fuel leaks.
(1) Check that there are no fuel leaks anywhere on the system after performing maintenance.
If there is a fuel leak, repair or replace parts as necessary.
2. CHECK FUEL PRESSURE
(a) Check that the battery positive voltage is above 12 V.
(b) Discharge the fuel system pressure Service Precautions.
(c) Disconnect the cable from the negative (-) battery terminal.
NOTICE:
The power window system utilizes a mechanism in which the door glass moves down slightly when the door is opened, and in which the glass moves up when the door is closed the door in order to prevent the door molding from being damaged. When the battery negative (-) terminal needs to be disconnected for servicing, fully open the driver and passenger door glasses in advance.
(d) Disconnect the No. 2 fuel tube. (Direct injection side)
(1) Loosen the hose clamp and disconnect the No. 2 fuel tube.
(e) Disconnect the fuel tube. (Port injection side)
(1) Loosen the hose clamp and disconnect the fuel tube.
(f) Install SST (pressure gauge) as shown in the illustration.
SST : 09268-31014
09268-41700
SST : 09268-45100
09268-41250
09268-41260
09268-41270
95336-08070
96135-51300
(g) Wipe off any gasoline.
(h) Reconnect the cable to the negative (-) battery terminal.
(i) Operate the fuel pump.
(1) Connect the Techstream to the DLC3.
(2) Turn the ignition switch to ON.
NOTICE:
Do not start the engine.
(3) Turn the Techstream on.
(4) Enter the following menus: Power train / Engine / Active Test / Control the Fuel Pump Speed.
(j) Measure the fuel pressure.
Standard fuel pressure:
350 to 500 kPa (4 to 5 kgf/cm2, 51 to 73 psi)
If the fuel pressure is higher than the specification, replace the fuel pump (built-in fuel tank).
If the pressure is lower than the specification, check the fuel hoses, connections, and fuel pump (built-in fuel tank).
(k) Start the engine.
(l) Measure the fuel pressure when idle.
Standard fuel pressure:
350 to 500 kPa (4 to 5 kgf/cm2, 51 to 73 psi)
If the pressure is not as specified, check the fuel pump and injectors.
(m) Stop the engine.
(n) Check that the fuel pressure remains as specified for 5 minutes after the engine has stopped.
Standard fuel pressure:
147 kPa (1.5 kgf/cm2, 21 psi) or more
If the pressure is not as specified, check the fuel pump or injectors.
(o) After checking the fuel pressure, disconnect the cable from the negative (-) battery terminal and carefully remove SST and the fuel tube connector to prevent fuel from spilling.
(p) Reconnect the No. 2 fuel tube with the clamp. (Direct injection side)
(q) Reconnect the fuel tube with the clamp. (Port injection side)
(r) Inspect for fuel leaks (Step 1).
3. CHECK FUEL PRESSURE (for High Pressure)
(a) Connect the Techstream to the DLC3.
(1) Turn the ignition switch to ON.
(2) Turn the Techstream on.
(b) Start and warm up the engine.
(c) Run the engine at idle.
(d) Enter the following menus: Power train / Engine / Data List / Fuel Press.
(e) Check the high pressure side fuel pressure.
Standard fuel pressure:
3000 to 5000 kPa (30.6 to 51.0 kgf/cm2, 435 to 725 psi)
If the pressure is not as specified, check the fuel pump, high pressure side fuel pump, fuel pressure sensor and wiring.
(f) Stop the engine.