Mercury Workshop Service and Repair Manuals

Code 561 - 570: Testing and Inspection
562 - 568

NOTE

KOEO refers to Key On Engine Off (KOEO)
KOER refers to Key On Engine Running (KOER)
DTC refers to Diagnostic Trouble Code (DTC)
DTCs should be diagnosed in the order they are received.

DTC 556

Fuel pump relay primary circuit failure.

KOEO Hard Code ........................................................................................................................................................................................  Go to J1
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/J - Fuel Pump Circuit/J1 - Check For VPWR
to Fuel Pump Relay

KOEO Memory Code .................................................................................................................................................................................  Go to J95
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/J - Fuel Pump Circuit/J95 - Check EEC-IV
Harness

DTC 557

Low speed fuel pump primary circuit failure.

KOEO Hard Code .....................................................................................................................................................................................  Go to X70
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/X - Constant Control Relay Module
(CCRM)/X70 - Code 556 or 557: Check Fuel Pump Relay Coil Resistance

KOEO Memory Code .............................................................................................................................................................................  Go to X115
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/X - Constant Control Relay Module
(CCRM)/X115 - Continuous Code 556/557: Check EEC-IV Harness

DTC 558

Exhaust gas recirculation valve vacuum regulator circuit failure during KOEO self-test.

KOEO Hard Code ..................................................................................................................................................................................  Go to DL11
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/DL - PFE/DPFE Sensor; EVR Solenoid
Testing/DL11 - Measure EVR Solenoid Resistance

DTC 559

Air Conditioning On relay circuit failure during KOEO self-test.

KOEO Hard Code .................................................................................................................................................................................  Go to KM60
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/KM - WOT A/C Cut-Off (WAC) A/C
Demand/KM60 - Check For Ignition Run Voltage to A/C Relay

DTC 562

Pusher fan control primary circuit failure.

KOEO Hard Code .....................................................................................................................................................................................  Go to X10
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/X - Constant Control Relay Module
(CCRM)/X10 - Check For VPWR to Pusher Fan Control Relay

DTC 563

High Fan Control (HFC) circuit failure during KOEO self-test.

KOEO Hard Code ...............................................................................................................................................................................................  KF1
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/KF - Low Fan Control/High Fan
Control/KF1 - Check for Start/Run Voltage at LFC/HFC 

DTC 564

Fan Control (FC) circuit failure during KOEO self-test.

KOEO Hard Code .....................................................................................................................................................................................  Go to KF1
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/KF - Low Fan Control/High Fan
Control/KF1 - Check for Start/Run Voltage at LFC/HFC