P0689 - Electronic Control Module (ECM)/Powertrain Control Module (Pcm) Power Relay Sense Circuit Low

WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2008 Mercury Sable, 2008 Mercury Mountaineer, 2008 Mercury Milan, 2008 Mercury Mariner, and 2008 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.

P0689 - ELECTRONIC CONTROL MODULE (ECM)/POWERTRAIN CONTROL MODULE (PCM) POWER RELAY SENSE CIRCUIT LOW

Description:	This DTC sets when the passive anti theft system (PATS) system indicates the key is in ON or START position and the ignition switch position run (ISP-R) circuit indicates OFF, ACC, or LOCK position.
Possible Causes:	Ignition circuit fuse ISP-R circuit open in the harness ISP-R circuit short to ground in the harness Damaged ignition switch Damaged PATS system
Diagnostic Aids:	Diagnose and repair all PATS DTCs first.
Application		Key On Engine Off	Key On Engine Running	Continuous Memory
All		refer to PINPOINT TEST B .