Service bulletin L-TT-0193-15

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

NHTSA's summary

"TT: TMS HAS DISCOVERED THE CURRENT ENGINE ACTIVE TEST “CONTROL THE INJECTION MODE” IS NOT OPERATING AS DESIRED WHEN CONTROLLING THE DIRECT INJECTORS MANUALLY ON 2GR-FKS OR 8AR-FTS ENGINES. WHEN DIRECT INJECTION IS STARTED AND THEN STOPPED USING THE ACTIVE TEST, CURRENT ECU LOGIC DOES NOT TURN OFF THE DIRECT INJECTORS AND CAN CAUSE DTCS P017200, P017500 AND P0160300. IN ORDER TO AVOID THIS CONDITION, TECHNICIANS SHOULD RAISE ENGINE RPM WHEN CHANGING FROM DIRECT INJECTION ACTIVE TEST TO PORT INJECTION ACTIVE TEST. USE THE RECOMMENDED PROCEDURE BELOW TO AVOID THIS CONCERN WHILE TESTING INJECTION MODE OF 2GR-FKS OR 8AR-FTS EQUIPPED VEHICLES. NOTE: IF THE ACTIVE TEST IS USED MULTIPLE TIMES WITHOUT USING THIS PROCEDURE TO RAISE ENGINE RPM, IT MAY BE NECESSARY TO RESET LEARNING VALUES FOR FUEL TRIM AND AIR TO FUEL RATIO BEFORE RETURNING VEHICLE TO CUSTOMER."

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Engine, Hybrid and electric drive

Trouble codes named

P0172, P0175

Listing a model year does not mean every vehicle of it is concerned: the document says which.

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