Advanced Diagnostics

Advanced Diagnostics

DTC P15AE: Cylinder Pause Signal 1 Malfunction (ACM System)







General Description
The engine mount control system controls the engine mounts electronically. The system consists of the active control engine mount (ACM) actuators, the engine mount control unit, and the powertrain control module (PCM). The engine mount control unit uses the crankshaft and camshaft position sensor outputs (received from the PCM) to estimate engine vibration. The engine mount control unit then sends signals to the ACM actuators to command the engine mounts to push and pull on the engine to counteract the engine vibration. The PCM monitors the SCPA signal. If the SCPA signal input value differs from the PCM output value (received by CAN communication) for a set time, the PCM detects a malfunction and a DTC is stored.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status







Enable Conditions







Malfunction Threshold
The SCPA signal input value differs from the PCM output value (received by CAN communication) for at least 2.6 seconds.

Confirmation Procedure with the HDS
Do the VTEC TEST in the INSPECTION MENU with the HDS.

Driving Pattern
1. Start the engine. Hold the engine speed at 3,000 rpm without load (in P or N) until the radiator fan comes on.
2. Drive the vehicle in a lower gear at 3,300 rpm or more for at least 10 seconds.

- Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

Diagnosis Details

Conditions for illuminating the indicator
When a malfunction is detected, the DTC and the freeze frame data are stored in the PCM memory. The MIL does not come on.

Conditions for clearing the DTC
The DTC and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.