On-Vehicle Inspection

2GR-FE EMISSION CONTROL: EMISSION CONTROL SYSTEM: ON-VEHICLE INSPECTION

ON-VEHICLE INSPECTION

1. INSPECT AIR FUEL RATIO COMPENSATION SYSTEM





(a) Measure the voltage between the terminals of the ECM connectors.
Standard voltage:





NOTICE:
Connect test leads to the connector's backside. The connectors should not be disconnected from the ECM.
HINT: Voltage of the ECM is kept constant regardless of the voltage of the air fuel ratio sensor.

(b) Connect the Techstream to the DLC3.
(c) Select the following menu items: Powertrain / Engine and ECT / Data List / O2S B1 S2, O2S B2 S2, AFS B1 S1, AFS B2 S1.
(d) Warm up the air fuel ratio sensor with the engine speed at 2,500 rpm for approximately 2 minutes.





(e) Maintain the engine speed at 2,500 rpm and confirm that the displays of "AFS B1 S1" and "AFS B2 S1" are as shown in the illustration.
- The illustration may differ slightly from the display on the the Techstream.
- Only the Techstream displays the waveform of the air fuel ratio sensor.

(f) Confirm that the display of "O2S B1 S2" and "O2S B2 S2" changes between 0 and 1 V with the engine speed at 2,500 rpm.
2. INSPECT FUEL CUT OFF / RESTART RPM
(a) Increase the engine speed to at least 2500 rpm.
(b) Use a sound scope to check for injector operating sounds.
(c) Check that when the throttle lever is released, injector operation sound stops momentarily (at 2500 rpm) and then resumes (at 1200 rpm).
Standard:






3. VISUALLY INSPECT HOSE, CONNECTIONS AND GASKETS





(a) Check for cracks, leaks or damage.
HINT: Separation of the engine oil dipstick, oil filler cap, PCV hose, etc. may causes the engine to run improperly. Disconnection, looseness or cracks in the parts of the air induction system between the throttle body and cylinder head will allow air suction and cause the engine to run improperly.

4. CHECK AIR INLET LINE





(a) Disconnect the air inlet line hose from the charcoal canister.
(b) Check that air can flow freely into the air inlet line.
If air cannot flow freely into the air inlet line, repair or replace it.
(c) Reconnect the air inlet line hose to the charcoal canister.