DTC P1380-00; Electric Variable Valve Timing Control Circuit Problem: Notes

DTC DETECTION DESCRIPTION

DTC P1380:00	Electric variable valve timing control circuit problem
DETECTION CONDITION	A malfunction is detected in the results of the on-board diagnostic test received from the electric variable valve timing driver. Diagnostic support note This is a continuous monitor (CCM). The check engine light does not illuminate. FREEZE FRAME DATA is not available. Snapshot data is available. DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	Stops activation of the electric variable valve timing driver.
POSSIBLE CAUSE	Electric variable valve timing motor/driver connectors or terminals malfunction Short to ground in wiring harness between electric variable valve timing motor/driver terminal 1A and PCM terminal 1AE PCM connector or terminals malfunction Short to power supply in wiring harness between electric variable valve timing motor/driver terminal 1A and PCM terminal 1AE Open circuit in wiring harness between electric variable valve timing motor/driver terminal 1A and PCM terminal 1AE Electric variable valve timing driver malfunction Electric variable valve timing motor malfunction PCM malfunction

Fig 1: Electric Variable Valve Timing Motor/Driver Circuit Diagram

Courtesy of MAZDA MOTORS CORP.

CAUTION:

• Verify the malfunction symptom according to not only the PID value but also the symptom troubleshooting.

PARTS DESCRIPTION

Item	Definition	Unit	Condition/Specification
VT_IN_ACT	Actual intake variable valve timing control Advance amount from max retard position	° (deg)	Displays actual intake variable valve timing- advance amount from max retard position
VT_IN_DES	Target intake variable valve timing control Advance amount from max retard position	° (deg)	Displays target intake variable valve timing- advance amount from max retard position