P1516 ACURA, BUICK, CADILLAC, CHEVROLET, GMC, HUMMER, HONDA, ISUZU, SUZUKI: THROTTLE ACTUATOR CONTROL (TAC) MODULE THROTTLE ACTUATOR POSITION PERFORMANCE
POST UPDATED IN May, 2023
P1516 ACURA, BUICK, CADILLAC, CHEVROLET, GMC, HUMMER, HONDA, ISUZU, SUZUKI: THROTTLE ACTUATOR CONTROL (TAC) MODULE THROTTLE ACTUATOR POSITION PERFORMANCE
The ECM (Engine Control Module) controls the TAC system (Throttle Actuator Control). The ECM determines the driver’s intention and based on this calculates the appropriate throttle response, which is achieved by a modulated pulse width voltage from the throttle body.
The TAC system uses the Throttle Body Engine Control (TAC) 1 and Throttle Body Motor Control (TAC) 2 circuits along with two processors to control the throttle body data. Both processors are located inside the ECM and are intended to monitor each other’s data to verify that the indicated throttle position is accurate.
If the showed throttle position is not similar to the expected throttle position within more than 0.5 s, the DTC code P1516 OBDII will be set.
The reasons why the fault code P1516 OBD2 is stored are
The steps to solve the P1516 OBDII diagnostic code are