P1662 GMC – Cruise Control Inhibit Control Circuit Conditions

P1662 GMC Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1662 GMC Possible Causes

Check Servo Motor Cruise Control (SMCC) module ignition feed fuse,Faulty Servo Motor Cruise Control (SMCC) module,Servo Motor Cruise Control (SMCC) module harness is open or shorted,Servo Motor Cruise Control (SMCC) module circuit poor electrical connection

P1662 GMC Description

Quad Driver Modules (QDM) are used by Powertrain Control Module (PCM) to turn on current driven devices needed to control various engine and transaxle functions. Each ODM can control up to 7 outputs, including cruise inhibit driver circuit, by supplying ground to the device PCM is commanding on. ODMs can diagnose each circuit individually. If ODM detects an improper voltage level in output circuit controlling the stepper motor cruise control inhibit circuit, the P1662 code will set.