DTC P0689 - ECM/PCM Power Relay Sense Circuit Low

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DTC DESCRIPTION P0689 - ECM/PCM POWER RELAY SENSE CIRCUIT LOW

Description: This DTC sets when the ISP-R and the INJPWRM circuit voltages do not correspond for a calibrated period of time.
Possible Causes: Ignition circuit fuse ISP-R circuit open ISP-R circuit short to ground VPWR circuit short to voltage INJPWR circuit short to voltage Damaged ignition switch Damaged fuel pump relay Damaged PCM power relay
Diagnostic Aids: The INJPWRM PID voltage reading should be 0 volts when the ignition is in the OFF, ACC or LOCK position.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	GO to PINPOINT TEST B .