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303-14-54 Powertrain Control Management 303-14-54 DESCRIPTION AND OPERATION (Continued) Flow Problem Possible Cause Possible solution DTCs Additional comments Chart that may Output be set Number 6 Poor VCT VCT oil filters are Check and clean P1381 Ref: Engine Section performance. blocked. filters in cam P1386 303-01a, b & c. Causing poor journal caps. drivability. Engine Oil control valve is Check OCV P1381 Ref: Engine Section runs well during faulty/Worn out. condition and P1386 303-01a, b & c. cruise conditions. replace as P1388 necessary. P1383 VCT Phasers are Check Phasers P1381 Ref: Engine Section worn/Faulty. and replace as P1386 303-01a, b & c. necessary. P1388 P1383 #1 camshaft journal Check journal P1381 Ref: Engine Section clearances are too clearances are P1386 303-01a, b & c. high. within specification. P1388 P1383 Electronic Throttle Body Diagnosis The PCM processes accelerator pedal and speed DTCs applicable to this output are shown on the control demand for the Electronic Throttle Body following table (ETB). The electric motor in the ETB moves the DTC Test Mode Condition throttle plate through a gear set. The plate is adjusted P2100 KOEO Cont. Throttle Actuator Control and monitored by the PCM in a closed control loop. Motor Circuit/Open The TP sensor provides the PCM with feedback on the actual position of the throttle plate. P2101 KOEO Cont. Throttle Actuator Control Motor Circuit CAUTION: The Electronic Throttle Body Range/Performance (ETB) must NOT be dismantled. No adjustments P2102 KOEO Cont. ETB motor current is can be made to the ETB. The only serviceable lower than expected item on the ETB is the Throttle Position Sensor P2103 KOEO Cont. ETB motor current is (TPS), which can be replaced. higher than expected NOTE: The preset stop-screw must not be adjusted P2105 Cont. Throttle Actuator Control as it is factory set and bonded tight. Adjustment will System - Forced Engine likely cause failure. Shutdown Connections P2107 Cont. Throttle Actuator Control System - Forced Engine PCM Pin A27 …………………………………..ETCP into guard mode PCM Pin A28 …………………………………..ETCN P2110 Cont ETC in Guard Mode. (Limp home mode) Circuit P2111 Cont. Throttle Actuator Control System - Higher throttle opening than driver demand P2112 Cont. Throttle Actuator Control System - Lower throttle opening than driver demand Failure Mode If a fault develops in the electronic throttle control system, a standby function is carried out. The plate is spring loaded to a slightly open position allowing enough air to pass to provide limited engine operation. This spring-loaded position is preset during G98133 en |