Part 4
FA20 ENGINE CONTROL: SFI SYSTEM: P0171, P0172, P1170, P117B; System Too Lean (Bank 1); 2013 MY FR-S [03/2012 -]
P0171 - System Too Lean (Bank 1)
P0172 - System Too Rich (Bank 1)
P1170 - Port Injector Fuel Performance
P117B - Direct Injector Fuel Performance
(Continued)
22. READ VALUE USING TECHSTREAM (FUEL PRESS)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Start the engine.
(e) Enter the following menus: Powertrain / Engine / Data List / Fuel Press.
(f) Read the value displayed on the Techstream.
Standard:
HINT
* The A/C switch and all accessory switches should be off, and the shift lever should be in the N, P or neutral position, and the engine should be fully warmed up.
* If the result is other than the standard value, there may be a fuel system (high pressure side) abnormality.
NG -- REPAIR OR REPLACE FUEL SYSTEM (HIGH PRESSURE SIDE)
OK -- Continue to next step.
23. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION WAY)
(a) Connect the Techstream to the DLC3.
(b) Start the engine.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Way / Direct.
(e) Read the value Fuel Press Target Value, Short FT #1 and Long FT #1.
Standard:
HINT
The A/C switch and all accessory switches should be off, and the shift lever should be in the N, P or neutral position, and the engine should be fully warmed up.
B -- READ VALUE USING TECHSTREAM (FUEL PRESS)
C -- REPLACE FUEL PRESSURE SENSOR Removal
D -- REPLACE FUEL INJECTOR ASSEMBLY (FOR DIRECT INJECTION) Removal
A -- Continue to next step.
24. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION WAY)
(a) Connect the Techstream to the DLC3.
(b) Start the engine.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Way / Direct.
(e) Read the value Fuel Press Target Value, Short FT #1 and Long FT #1.
Standard:
HINT
The A/C switch and all accessory switches should be off, and the shift lever should be in the N, P or neutral position, and the engine should be fully warmed up.
B -- CHECK FOR INTERMITTENT PROBLEMS Check For Intermittent Problems
A -- REPLACE ECM Removal
25. READ VALUE USING TECHSTREAM (FUEL PRESS)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Start the engine.
(e) Enter the following menus: Powertrain / Engine / Data List / Fuel Press.
(f) Read the value displayed on the Techstream.
Standard:
HINT
* Turn the ignition switch to ON immediately after turning the ignition switch off.
* After approximately 10 minutes, fuel pressure reaches 0 kPa.
* Depending on the vehicle condition, after turning the ignition switch to ON, fuel pressure may rise moderately.
Result:
B -- REPLACE FUEL PUMP ASSEMBLY (FOR HIGH PRESSURE) Removal
A -- REPLACE FUEL INJECTOR ASSEMBLY (FOR DIRECT INJECTION) Removal
26. INSPECT FUEL INJECTOR ASSEMBLY (FOR PORT INJECTION)
(a) Inspect the fuel injector assembly (for port injection) Fuel Injector (For Port Injection).
NG -- REPLACE FUEL INJECTOR ASSEMBLY (FOR PORT INJECTION) Removal
OK -- REPLACE ECM Removal
27. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER CONNECTOR CONNECTION)
(a) Check the connection and terminal contact pressure of connectors and wire harness between the mass air flow meter and ECM .
HINT
Repair any problems.
NEXT -- Continue to next step.
28. CLEAR DTC
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.
NEXT -- Continue to next step.
29. READ VALUE USING TECHSTREAM (SHORT FT #1 AND LONG FT #1)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Start the engine.
(e) Enter the following menus: Powertrain / Engine / Data List / Short FT #1, Long FT #1
(f) Read the value displayed on the Techstream.
Standard:
NG -- CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM)
OK -- END
30. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM)
(a) Disconnect the mass air flow meter connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for open):
Standard Resistance (Check for short):
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
31. REPLACE MASS AIR FLOW METER
(a) Replace the mass air flow meter Removal.
HINT
If the result of the inspection performed in step 8 indicated no problem, proceed to the next step without replacing the mass air flow meter.
NEXT -- Continue to next step.
32. CLEAR DTC
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.
NEXT -- Continue to next step.
33. READ VALUE USING TECHSTREAM (SHORT FT #1 AND LONG FT #1)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Start the engine.
(e) Enter the following menus: Powertrain / Engine / Data List / Short FT #1, Long FT #1.
(f) Read the value displayed on the Techstream.
Standard:
HINT
If the trouble occurs during high speed driving, it is possible to take measurements at medium or low speeds by matching the intake air volume to that at the time of the trouble by shifting down.
NG -- REPLACE ECM Removal
OK -- END