P1354 - FAULT CODE - OBD2

P1354 BUICK, CADILLAC, CHEVROLET, GMC: IGNITION CONTROL MODULE OUTPUT HIGH/PULSE DETECTED WHEN GROUNDED CYLINDER 4

The Ignition Control Module (ICM) controls the electrical power and ground circuits. Various circuits between the ICM and the Powertrain Control Module (PCM) control timing signals from the IC (Ignition Control), the medium resolution engine, the low-resolution engine, and a low reference.

The 3X signals are sent from the ICM to the Powertrain Control Module, in addition to controlling the timing advance at engine start. If the Powertrain Control Module takes the second 3X signal, or if this controller applies the 5 volts in the timing signal circuit, the timing advance is switched to PCM control.

When the engine is started, the ICM monitors the timing signal provided by the CKP Sensor, which determines the cylinder torque and allows the coil to begin its firing sequence.

When the P1354 OBD2 fault code is set, it is because the ICM has detected a short when the ground signal was sent to engine cylinder 4.

• Check Engine light ON.
• Ignition failures.

The P1354 OBDII diagnostic code is set for the following reasons:

• The connectors or respective cables of the Ignition Control Module may be in poor condition.
• The ICM circuit may be shorted.
• The ICM may be faulty.