DTC P1654 - A/C RELAY CONTROL CIRCUIT Oldsmobile Cutlass VI

Note. For circuit reference, see the appropriate WIRING DIAGRAMS article. For connector and terminal identification, see CONNECTOR IDENTIFICATION .

Circuit Description

Output Driver Modules (ODM) are used by PCM to turn on current-driven devices needed to control various engine and transaxle functions. Each ODM can control up to 7 outputs, including A/C relay driver circuit, by supplying ground to device PCM is commanding on. ODMs can diagnose each circuit individually. If ODM "B" output 4 (A/C relay driver circuit) detects an improper voltage level, P1654 is set.

Conditions required to set DTC are

1. Ignition is on.
2. An improper voltage level has been detected on A/C relay driver circuit.
3. Conditions present for at least 20 seconds.