chevrolet Workshop Repair Guides

Chevrolet Workshop Service and Repair Manuals

Idle Speed/Throttle Actuator - Electronic > < ECM - Packard 32 Way Connector Identification|Page 1212
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Engine Speed Sensor: Testing and Inspection

Disconnect speed sensor wiring connector and connect "B," "BR" and "BY" color coded wiring terminals to each other with jumper wires. With
engine running at about 1500- 1700 RPM, check for continuity between "LgB" color coded wiring terminals. If continuity exists, the engine speed
sensor is operating properly.

Idle Speed/Throttle Actuator - Electronic > < ECM - Packard 32 Way Connector Identification|Page 1212