Air Injection Pump: Testing and Inspection

1UR-FE EMISSION CONTROL: AIR PUMP: ON-VEHICLE INSPECTION

1. INSPECT AIR PUMP ASSEMBLY

(a) Start the engine and warm it up.

(b) Turn the engine switch off.





(c) Connect the 400 A probe of an ammeter to the positive (+) wire of the air pump.

(d) Connect the Techstream to the DLC3.

(e) Turn the engine switch on (IG) and turn the Techstream on.

(f) Enter the following menus: Powertrain / Engine and ECT / Utility / Air Injection Check / Manual Mode / AIR PUMP: ON, ASV1: OPEN, ASV2: OPEN.

HINT
When Manual Mode is selected, Techstream initialization (atmospheric pressure measurement) is performed automatically. Initialization takes 10 seconds. After initialization, AIR PUMP and ASV operation can be selected.

(g) Measure the current while the air pump is operating.

Standard Current:





If the result is not as specified, replace the air pump.

(h) Turn the engine switch off.

NOTICE:
* Air Injection Check only allows technicians to operate the AIR system for a maximum of 5 seconds.
Furthermore, the check can only be performed up to 4 times per trip. If the test is repeated, intervals of at least 30 seconds are required between checks.
While AIR system operation using the Techstream is prohibited, the Techstream display indicates the prohibition (WAIT or ERROR).
If ERROR is displayed on the Techstream during the test, stop the engine for 10 minutes, and then try again.
* Performing Air Injection Check repeatedly may cause damage to the AIR system. If necessary, leave an interval of several minutes between Air Injection Check operations to prevent the system from overheating.
* When performing the Air Injection Check operation after the battery cable has been reconnected, wait for 7 minutes with the engine switch on (IG) or the engine running.
* Turn the engine switch off when the Air Injection Check operation finishes.