P1352 BUICK, CADILLAC, CHEVROLET, GMC: IGNITION CONTROL MODULE OUTPUT HIGH/PULSE DETECTED WHEN GROUNDED CYLINDER 2
POST UPDATED IN May, 2023
P1352 Code failures by brands
Description of DTC code P1352
The ICM (Ignition Control Module) has its power supply, as well as some dedicated ground circuits that control the ignition timing when the engine starts. In turn, the PCM (Powertrain Control Module) takes control of the ignition timing right after the engine starts. To make this control function easier, the PCM relies on input data provided by the CKP Sensor (Crankshaft Position Sensor) and CMP Sensor (Camshaft Position Sensor) through ignition timing trigger signal circuits, the low-resolution engine signal, the low reference signal, and the camshaft position signal.
The Ignition Control Module monitors the CKP Sensor signals during the engine start to calculate the right cylinder torque. A sequence of events starts and makes possible the ignition coil charge or acceleration timing to create and deliver the ignition. If a short occurs on the positive side of the battery, which is related to the ignition circuit for cylinder number 2, the PCM will recognize it as a fault. So, it will not be able to control any aspect of the cylinder 2 ignitions efficiently, and the diagnostic code P1352 OBDII will be set.
Symptoms of fault code P1352
- Check Engine light illuminated.
- Engine exhibits erratic operation.
- Irregularities at idle.
- Hard engine start.
Causes of OBD2 P1352
Reasons to set the P1352 OBD2 fault code:
- The Ignition Control Module may be faulty.
- The ignition control circuit may be damaged.
- Possibly the CKP Sensor is damaged or shorted to the battery positive.
Possible solutions of the DTC code P1352
To troubleshoot the DTC P1352 OBDII code, try this:
- Consult the Technical Service Bulletins.
- Check all wiring and connections to the Ignition Control Module to make sure they meet the requirements for proper electrical circuit performance. Fix them if necessary.
- With a multimeter, perform voltage tests to the ICM circuit and compare the results obtained with those specified by the manufacturer. Repair if you find inconsistencies.
- Consult the ICM diagnostic steps in the manufacturer's service manual. If you determine that the ICM is faulty, make the necessary corrections.
