852375A 4 Mercury HARNESS

Table 1
Diagnostic Codes Table    
Description    Conditions which Generate this Code    System Response    
110-3 Engine Coolant Temperature Sensor : Voltage Above Normal     The engine Electronic Control Module (ECM) detects signal voltage that is greater than 4.95 VDC for 8 seconds.     The code is logged after 7 minutes.
The value of the parameter is set to 90 °C (194 °F).
The engine will not enter cold mode while the code is active.    
110-4 Engine Coolant Temperature Sensor Voltage : Voltage Below Normal     The ECM detects signal voltage that is less than 0.2 VDC for 8 seconds.     The code is logged.
The value of the parameter is set to
90 °C (194 °F).
The engine will not enter cold mode while the code is active.    
172-3 Intake Manifold Air Temperature Sensor : Voltage Above Normal     The ECM detects signal voltage that is greater than 4.95 VDC for 8 seconds.     Ambient temperature must be greater than
-35 °C (-31 °F) in order to allow diagnostic to log.
The value of the parameter is set to
85 °C (185 °F).    
172-4 Intake Manifold Air Temperature Sensor Voltage : Voltage Below Normal     The ECM detects signal voltage that is less than 0.2 VDC for 8 seconds.     Ambient temperature must be less than
140 °C (284 °F) in order to allow diagnostic to log.
The value of the parameter is set to
85 °C (185 °F).    
174-3 Fuel Temperature Sensor : Voltage Above Normal     The ECM detects signal voltage that is greater than 4.95 VDC for 8 seconds.     Engine coolant temperature must be above
-10 °C (14 °F) in order to allow diagnostic to log.
The value of the parameter is set to the value of the engine coolant temperature.    
174-4 Fuel Temperature Sensor voltage : Voltage Below Normal     The ECM detects signal voltage that is less than 0.2 VDC for 8 seconds.     The code is logged.
The value of the parameter is set to the value of the engine coolant temperature.    
175-3 Engine Oil Temperature Sensor : Voltage Above Normal     The ECM detects signal voltage that is greater than 4.95 VDC for 8 seconds.     Ambient temperature must be greater than
-35 °C (-31 °F) in order to allow diagnostic to log.
The value of the parameter is set to the value of the engine coolant temperature.    
175-4 Engine Oil Temperature Sensor Voltage : Voltage Below Normal     The ECM detects signal voltage that is less than 0.2 VDC for 8 seconds.     The code is logged.
The value of the parameter is set to the value of the engine coolant temperature.    
1796-3 Intake Manifold #2 Air Temperature Sensor : Voltage Above Normal     The ECM detects signal voltage that is greater than 4.95 VDC for 8 seconds.     The code will not be logged if the actual temperature is below
-30 °C (-22 °F). The code may be active or the logged code may be pending until this temperature is reached.
The value of the parameter is set to the value of the other intake manifold temperature sensor. If both sensor signals are lost, a value of
85 °C (185 °F) will be used.    
1796-4 Intake Manifold #2 Air Temperature Sensor Voltage : Voltage Below Normal     The ECM detects signal voltage that is less than 0.2 VDC for 8 seconds.     Ambient temperature must be less than
140 °C (284 °F) in order to allow diagnostic to log. The code may be active or the logged code may be pending until this temperature is reached.
The value of the parameter is set to the value of the other intake manifold temperature sensor. If both sensor signals are lost, a value of
85 °C (185 °F) will be used.    
2323-3 Fuel Rail Temperature Sensor : Voltage Above Normal     The ECM detects signal voltage that is greater than 4.95 VDC for 8 seconds.     Ambient temperature must be greater than
-35 °C (-31 °F) in order to allow diagnostic to log.
The value of the parameter is set to the value of the engine coolant temperature.    
2323-4 Fuel Rail Temperature Sensor Voltage : Voltage Below Normal     The ECM detects signal voltage that is less than 0.2 VDC for 8 seconds.     Ambient temperature must be less than
140 °C (284 °F) in order to allow diagnostic to log.
The value of the parameter is set to the value of the engine coolant temperature.    System OperationUse this procedure to troubleshoot any suspect problems with the following sensors:
Engine coolant temperature sensor
Engine oil temperature sensor
Filtered fuel temperature sensor
Left intake manifold air temperature sensor
Right intake manifold air temperature sensor (No 2)
High pressure fuel temperature sensorThe sensor signal for the passive sensors is routed to terminal 1 of each sensor connector. The analog return for the passive sensors is routed from the ECM to terminal 2 of each sensor connector.The following components can cause these codes:
Electrical connector or wiring
Sensor
ECMThe most likely cause of a code is a problem with an electrical connector or wiring. The least likely cause of a code is the ECM.
Illustration 1 g01430212
Schematic for the analog sensors
Illustration 2 g01459695
Locations of the analog sensors (right side engine view) (1) Filtered oil temperature sensor (2) Filtered fuel temperature sensor (3) High-pressure fuel temperature sensor
Illustration 3 g01430311
Locations of the analog sensors (top side engine view) (4) Right intake manifold air temperature sensor (No 2) (5) Left intake manifold air temperature sensor
Illustration 4 g01459703
Locations of the components that are for the analog sensors for the 16 cylinder engines (front side engine view) (6) Engine block outlet coolant temperature sensor (7) J2/P2 ECM connectors (8) Right rail connector (9) J1/P1 ECM connectors (10) Left rail connector
Illustration 5 g01455987
Locations of the components for the analog sensors for the 20 cylinder engines (front side engine view) (6) Engine block outlet coolant temperature sensor (7) J2/P2 ECM connectors (8) Right rail connector (9) J1/P1 ECM connectors (10) Left rail connector