Part 3
2GR-FSE ENGINE CONTROL: SFI SYSTEM: P0171,P0172,P0174,P0175,P1170,P117B: System Too Lean (Bank 1)
P117B - Direct Injector Fuel Performance
PART 3
21. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM)
(a) Disconnect the MAF meter connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance.
Standard resistance (Check for open):
Standard resistance (Check for short):
(d) Reconnect the ECM connector.
(e) Reconnect the MAF meter connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
22. REPLACE MASS AIR FLOW METER SUB-ASSEMBLY
(a) Replace the mass air flow meter sub-assembly 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 floe meter sub-assembly.
NEXT -- Continue to next step.
23. PERFORM CONFIRMATION DRIVING PATTERN
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG) and turn the Techstream on.
(c) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.
(d) Turn the engine switch off.
(e) Turn the engine switch on (IG) and turn the Techstream on.
(f) Start the engine and warm it up.
(g) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
NEXT -- Continue to next step.
24. CHECK WHETHER DTC OUTPUT RECURS (DTC P0171, P0172, P0174, P0175, P1170 AND/OR P117B)
(a) Enter the following menus: Powertrain / Engine / Trouble Codes.
(b) Read the pending DTCs.
Result:
NG -- END
OK -- REPLACE ECM Removal
25. CHECK FUEL PUMP OPERATION
(a) Check the fuel pump operation Fuel System.
NG -- REPLACE FUEL PUMP
OK -- Continue to next step.
26. CHECK FUEL LEAK (LOW PRESSURE SIDE)
(a) Check for fuel leaks (low pressure side).
OK:
No leaks.
NG -- REPAIR OR REPLACE FUEL SYSTEM (LOW PRESSURE SIDE)
OK -- Continue to next step.
27. CHECK FUEL LINE
(a) Check the fuel line leaks or blockage.
OK:
No leaks or blockage.
NG -- REPAIR OR REPLACE FUEL LINE
OK -- CHECK AND REPLACE FUEL SYSTEM (FUEL PRESSURE REGULATOR, FUEL FILTER)
28. INSPECT INTEGRATION NO. 1 RELAY (A/F RELAY)
(a) Inspect the integration No. 1 relay (A/F relay) Integration Relay.
NG -- REPLACE INTEGRATION NO. 1 RELAY
OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (AIR FUEL RATIO SENSOR - INTEGRATION NO. 1 RELAY)
29. CHECK FUEL PRESSURE SENSOR
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Start the engine.
(e) Enter the following menus: Powertrain / Engine / Trouble Codes / Fuel Press.
(f) While revving the engine, check that the fuel pressure fluctuates.
Standard:
Idling
3000 to 5000 kPa
2500 rpm (Depress accelerator pedal fully)
7000 to 9000 kPa
HINT
The A/C switch and all accessory switches should be off, and the shift lever should be in the N or P position, and the engine should be fully warmed up.
NG -- CHECK MISFIRE COUNT
OK -- Continue to next step.
30. READ VALUE USING TECHSTREAM
(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.
HINT
The A/C switch and all accessory switches should be off, and the shift lever should be in the N or P position, and the engine should be fully warmed up.
(e) Read the value Short FT #1, Long FT #1, Short FT #2, Long FT #2 and Fuel Pump Duty (D4).
Result:
C -- REPLACE ECM Removal
B -- CHECK FUEL RELIEF VALVE
A -- REPLACE FUEL PRESSURE SENSOR Removal
D -- Continue to next step.
31. READ VALUE USING TECHSTREAM
(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.
HINT
The A/C switch and all accessory switches should be off, and the shift lever should be in the N or P position, and the engine should be fully warmed up.
(e) Read the value Short FT #1, Long FT #1, Short FT #2, Long FT #2 and Fuel Pump Duty (D4).
Result:
D -- CHECK FOR INTERMITTENT PROBLEMS Check For Intermittent Problems
C -- REPLACE FUEL INJECTOR ASSEMBLY (FOR DIRECT INJECTION (BANK 2)) Removal
B -- REPLACE FUEL INJECTOR ASSEMBLY (FOR DIRECT INJECTION (BANK 1)) Removal
A -- REPLACE FUEL INJECTOR ASSEMBLY (FOR DIRECT INJECTION (ALL CYLINDER))
32. CHECK MISFIRE COUNT
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Start the engine.
(e) Enter the following menus: Powertrain / Engine / Active test / Control the Injection Way / Direct.
(f) Allow the engine to idle.
(g) Monitor all of the misfire count values that are displayed on the Techstream: Powertrain / Engine / Data List / Misfire / Cylinder #1 Misfire Count to Cylinder #6 Misfire Count.
If no misfire counts occur for any of the cylinders, perform the following procedure:
(1) Move the shift lever to D.
(2) Monitor all of the misfire rate values that are displayed on the Techstream.
Result:
B -- REPLACE FUEL INJECTOR ASSEMBLY (FOR DIRECT INJECTION) Removal
A -- Continue to next step.
33. INSPECT INJECTOR DRIVER
(a) Replace the injector driver with known good ones from another vehicle.
NOTICE:
Do not disconnect and reconnect the connectors with the engine switch on (IG), as he injector driver (EDU) may be damaged.
(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG).
(d) Turn the Techstream on.
(e) Start the engine.
(f) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.
(g) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
NEXT -- Continue to next step.
34. CHECK WHETHER DTC OUTPUT RECURS (DTC P0171, P0172, P0174, P0175, P1170 AND/OR P117B)
(a) Enter the following menus: Powertrain / Engine / Trouble Codes.
(b) Read the pending DTCs
Result:
B -- END (INJECTOR DRIVER IS DEFECTIVE)
A -- Continue to next step.
35. CHECK FUEL RELIEF VALVE
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Start the engine.
(e) Enter the following menus: Powertrain / Engine / Data List / Fuel Press.
(f) Record the Fuel Press value.
(g) Turn the engine switch off.
(h) Wait for 10 seconds.
(i) Turn the engine switch on (IG) and turn the Techstream on.
(j) Enter the following menus: Powertrain / Engine / Data List / Fuel Press.
(k) Compare the Fuel Press value recorded with the engine running to the Fuel Press value currently shown on the Techstream.
Result:
A -- REPLACE FUEL RELIEF VALVE
B -- REPLACE FUEL PUMP FOR HIGH PRESSURE
36. CHECK FUEL INJECTOR ASSEMBLY (FOR PORT INJECTION)
(a) Check the injection volume (whether fuel volume is high or low, and whether injection pattern is poor).
NG -- REPLACE FUEL INJECTOR FOR PORT INJECTION
OK -- REPLACE ECM Removal