Part 2
2GR-FSE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0171, P0172, P0174, P0175, P1170, P117B: System Too Lean (Bank 1)
P117B - Direct Injector Fuel Performance (Continued)
8. READ VALUE USING TECHSTREAM (MAF)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Put the engine in inspection mode Inspection Mode Procedure.
(e) Start the engine.
(f) Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / MAF and Coolant Temp.
(g) Allow the engine to idle until Coolant Temp reaches 75°C (167°F) or higher.
(h) Read MAF with the engine speed at 2500 rpm.
Standard:
Between 10 gm/sec. and 16 gm/sec. (shift lever: N; A/C: Off).
NG -- CHECK HARNESS AND CONNECTOR
OK -- Continue to next step.
9. CHECK FUEL PRESSURE (LOW PRESSURE)
(a) Check the fuel pressure Testing and Inspection.
NG -- CHECK FUEL PUMP OPERATION (FOR LOW PRESSURE)
OK -- Continue to next step.
10. CHECK FOR EXHAUST GAS LEAK
(a) Check for exhaust gas leaks.
OK:
No gas leaks.
NG -- REPAIR OR REPLACE EXHAUST SYSTEM
OK -- Continue to next step.
11. CHECK FOR SPARKS AND IGNITION P0300
NG -- REPAIR OR REPLACE IGNITION SYSTEM
OK -- PERFORM CONFIRMATION DRIVING PATTERN
12. INSPECT AIR FUEL RATIO SENSOR (HEATER RESISTANCE) P0031
NG -- REPLACE AIR FUEL RATIO SENSOR Removal
OK -- Continue to next step.
13. CHECK TERMINAL VOLTAGE (+B OF A/F SENSOR) P0031
NG -- INSPECT INTEGRATION NO.2 RELAY (A/F RELAY)
OK -- Continue to next step.
14. CHECK HARNESS AND CONNECTOR (A/F SENSOR - ECM) P2237
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
15. REPLACE AIR FUEL RATIO SENSOR
(a) Replace air fuel ratio sensor Removal.
NEXT -- Continue to next step.
16. PERFORM CONFIRMATION DRIVING PATTERN
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG) and turn the Techstream on.
(c) Clear the DTCs DTC Check / Clear.
(d) Turn the power switch off.
(e) Turn the power switch on (IG) and turn the Techstream on.
(f) Put the engine in inspection mode Inspection Mode Procedure.
(g) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
NEXT -- Continue to next step.
17. CHECK WHETHER DTC OUTPUT RECURS (DTC P0171, P0172, P0174, P0175, P1170 AND/OR P117B)
(a) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(b) Read the pending DTCs.
Result:
B -- END
A -- Continue to next step.
18. CHECK HARNESS AND CONNECTOR
(a) Check the connection and terminal contact pressure of the connectors and wire harness between the mass air flow meter sub-assembly and ECM Electronic Circuit Inspection Procedure.
HINT
Repair any problems.
NEXT -- Continue to next step.
19. PERFORM CONFIRMATION DRIVING PATTERN
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG) and turn the Techstream on.
(c) Clear the DTCs DTC Check / Clear.
(d) Turn the power switch off.
(e) Turn the power switch on (IG) and turn the Techstream on.
(f) Put the engine in inspection mode Inspection Mode Procedure.
(g) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
NEXT -- Continue to next step.
20. CHECK WHETHER DTC OUTPUT RECURS (DTC P0171, P0172, P0174, P0175, P1170 AND/OR P117B)
(a) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(b) Read the pending DTCs.
Result:
B -- END
A -- Continue to next step.
21. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM)
(a) Disconnect the E42 MAF meter connector.
(b) Disconnect the E83 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 flow meter sub-assembly.
NEXT -- Continue to next step.
23. PERFORM CONFIRMATION DRIVING PATTERN
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG) and turn the Techstream on.
(c) Clear the DTCs DTC Check / Clear.
(d) Turn the power switch off.
(e) Turn the power switch on (IG) and turn the Techstream on.
(f) Put the engine in inspection mode Inspection Mode Procedure.
(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 and ECT / Trouble Codes.
(b) Read the pending DTCs.
Result:
B -- END
A -- REPLACE ECM Removal
25. CHECK FUEL PUMP OPERATION (FOR LOW PRESSURE)
(a) Check the fuel pump for low pressure operation Testing and Inspection.
NG -- REPLACE FUEL PUMP (FOR LOW PRESSURE) Removal
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 for 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.2 RELAY (A/F RELAY)
(a) Inspect the integration No. 2 relay (A/F relay) Testing and Inspection.
NG -- REPLACE INTEGRATION NO.2 RELAY
OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (AIR FUEL RATIO SENSOR - INTEGRATION NO. 2 RELAY)
29. CHECK FUEL PRESSURE SENSOR
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Put the engine in inspection mode Inspection Mode Procedure.
(e) Start the engine.
(f) Enter the following menus: Powertrain / Engine and ECT / Data List / Fuel Press.
(g) While revving the engine, check that the fuel pressure fluctuates.
Standard:
Idling
3000 to 5000 kPa
2500 rpm (Accelerator pedal fully depressed)
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) Put the engine in inspection mode Inspection Mode Procedure.
(b) Connect the Techstream to the DLC3.
(c) Start the engine.
(d) Turn the Techstream on.
(e) Enter the following menus: Powertrain / Engine and ECT / 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.
(f) Read the value Short FT #1, Long FT #1, Short FT #2, Long FT #2 and Fuel Pump Duty (D4).
Result:
D -- REPLACE ECM Removal
C -- CHECK FUEL RELIEF VALVE
B -- REPLACE FUEL PRESSURE SENSOR Removal
A -- Continue to next step.
31. READ VALUE USING TECHSTREAM
(a) Put the engine in inspection mode Inspection Mode Procedure.
(b) Connect the Techstream to the DLC3.
(c) Start the engine.
(d) Turn the Techstream on.
(e) Enter the following menus: Powertrain / Engine and ECT / 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.
(f) 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)) Removal
32. CHECK MISFIRE COUNT
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Put the engine in inspection mode Inspection Mode Procedure.
(e) Start the engine.
(f) Enter the following menus: Powertrain / Engine and ECT / Active test / Control the Injection Way / Direct.
(g) Allow the engine to idle.
(h) Monitor all of the misfire count values that are displayed on the Techstream: Powertrain / Engine and ECT / 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 a known good one from another vehicle.
NOTICE:
Do not disconnect and reconnect the connectors with the power switch on (IG), as the injector driver (EDU) may be damaged.
(b) Connect the Techstream to the DLC3.
(c) Turn the power switch on (IG).
(d) Turn the Techstream on.
(e) Put the engine in inspection mode Inspection Mode Procedure.
(f) Start the engine.
(g) Clear the DTCs DTC Check / Clear.
(h) 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 and ECT / 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 power switch on (IG).
(c) Turn the Techstream on.
(d) Put the engine in inspection mode Inspection Mode Procedure.
(e) Start the engine.
(f) Enter the following menus: Powertrain / Engine and ECT / Data List / Fuel Press.
(g) Record the Fuel Press value.
(h) Turn the power switch off.
(i) Wait for 10 seconds.
(j) Turn the power switch on (IG) and turn the Techstream on.
(k) Enter the following menus: Powertrain / Engine and ECT / Data List / Fuel Press.
(l) Compare the Fuel Press value recorded with the engine running to the Fuel Press value currently shown on the Techstream.
Result:
B -- REPLACE FUEL RELIEF VALVE Removal
A -- REPLACE FUEL PUMP FOR HIGH PRESSURE Removal
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 ASSEMBLY (FOR PORT INJECTION) Removal
OK -- REPLACE ECM Removal