On-Vehicle Inspection

INSPECT IAC VALVE OPERATION
1. Initial conditions:
  - Engine at normal operating temperature
  - Idle speed checked correctly
  - Transmission in neutral position
  - A/C switch OFF
2. Using SST, connect terminals Tc and CG of the DLC3.
  SST 09843-18040
3. After engine speed is kept at approx. 1,000 rpm for 5 seconds, check that it returns to idle speed.
  If the engine speed operation is not as specified, check the IAC valve, wiring and ECM.
4. Remove the SST from the DLC3.
  SST 09843-18040
Fig 1: Identifying DLC3 Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT AIR ASSIST SYSTEM
1. Initial conditions:
  - Engine at normal operating temperature
  - Idle speed checked correctly
  - Transmission in neutral position
  - A/C switch OFF
2. Using SST, connect terminals Tc and CG of the DLC3.
  SST 09843-18040
3. After engine speed is kept at 900 -1,300 rpm for 10 seconds, check that it returns to idle speed.
4. Stop the engine.
5. Remove the V-bank cover.
  
  Fig 2: Connecting Terminals TC And CG Of DLC3
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. Disconnect the air assist hose from the air pipe, and block off the IAC valve exit and the entry to the pipe.
7. Start the engine and check that the idle speed reaches 500 rpm or below (the engine may stall).
  If the idle does not reach 500 rpm or below, check for a leak between the air assist hoses, pipe and injectors.
8. Remove the SST from the DLC3.
  SST 09843-18040
9. Reconnect the air assist hose to the air pipe.
10. Reinstall the V-bank cover.
Fig 3: Disconnecting Air Assist Hose From Air Pipe
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002