Inspection Procedure

WARNING: This page is about a different car, the 2009 Toyota Tacoma. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DTCS
Result:

Any other DTCs are not set.

NG: GO TO DIAGNOSTIC TROUBLE CODE CHART

OK: Go to next step
READ SHORT-TERM AND LONG-TERM FUEL TRIMS
HINT:

The total of the short-term fuel trim (Short FT) and long-term fuel trim (Long FT) is used to discover a problem in the induction system (between air cleaner and intake manifold).
1. Allow the engine to idle.
2. Enter the following menus: Powertrain/Engine and ECT/Data List/A/F Control System/Short FT #1 and Long FT #1, or Short FT #2 and Long FT #2.
3. Read the value of Short FT #1 and Long FT #1 (bank 1).
  Result:
  
  Total of Short FT and Long FT is between -20% and 20%
  
  NG: Go to step 4
  
  OK: Go to next step
CHECK THROTTLE BODY
1. Check for deposits around the throttle valve and throttle valve condition.
  Result:
  
  No deposits around throttle valve and throttle valve moves smoothly.
  
  NG: Go to step 8
  
  OK: Go to step 9
CHECK VVT SYSTEM
1. Allow the engine to idle with the engine warmed up.
2. Enter the following menus: Powertrain/Engine and ECT/Active Test/Control the VVT System (Bank 1).
3. Turn on Control the VVT System (Bank 1) to advance the valve timing.
4. Check the engine condition.
  Result:
  
  The engine stalls or idles roughly when VVT Control is ON. (VVT system is OK)
  
  NG: Go to step 10
  
  OK: Go to next step
CHECK PCV SYSTEM
1. Allow the engine to idle.
2. Pinch the positive crankcase ventilation (PCV) hose.
3. Check the engine rpm.
  Result:
  
  The engine rpm rises when the PCV hose is pinched.
  
  NG: Go to step 11
  
  OK: Go to next step
CHECK AIR CLEANER FILTER
1. Visually check that the air cleaner filter is not excessively contaminated with dirt or oil.
  NG: Go to step 12
  
  OK: Go to next step
CHECK AIR INDUCTION SYSTEM
1. Check the air induction system for vacuum leakage.
  NG: Go to step 13
  
  OK: Go to step 14
REPAIR OR REPLACE THROTTLE BODY
NEXT: Go to step 15
REPLACE ECM
1. Replace the ECM (See REMOVAL ).
  NEXT: Go to step 15
CHECK AND REPAIR VVT SYSTEM
NEXT: Go to step 15
REPAIR OR REPLACE PCV HOSE
NEXT: Go to step 15
REPLACE AIR CLEANER FILTER
NEXT: Go to step 15
REPAIR OR REPLACE AIR INDUCTION SYSTEM
NEXT: Go to step 15
REPLACE MASS AIR FLOW METER
NEXT: Go to step 15
CHECK DTCS
1. Check that the engine coolant temperature is -10 to 50°C (14 to 122°F).
2. Clear the DTC.
3. Enter the check mode using the Techstream.
4. Allow the engine to idle for 1 minute.
5. Check that no DTC is present.
  OK:
  
  No DTC output.
  
  NEXT: END