34522 Mercruiser STUD, VLAUE ROCKER ARM ( 003 O.S.)

Table 1
Diagnostic Codes Table
CDL Description Conditions which Generate this Code System Response
110-3 Engine Coolant Temperature Sensor : Voltage Above Normal The Electronic Control Module (ECM) detects signal voltage that is greater than 4.95 VDC for 8 seconds.
The ECM has been powered for at least 2 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 Below Normal The ECM detects signal voltage that is less than 0.2 VDC for 8 seconds.
The ECM has been powered for at least 2 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.
172-03 Intake Manifold Air Temperature Sensor : Voltage Above Normal The ECM detects signal voltage that is greater than 4.95 VDC for 8 seconds.
The ECM has been powered for at least 2 seconds. Ambient temperature must be greater than −35 °C (−31 °F) in order to allow logging of this diagnostic code.
The value of the parameter is set to 85 °C (185 °F).
172-04 Intake Manifold Air Temperature Sensor : Voltage Below Normal The ECM detects signal voltage that is less than 0.2 VDC for 8 seconds.
The ECM has been powered for at least 2 seconds. Ambient temperature must be less than 140 °C (284 °F) in order to allow logging of this diagnostic code.
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.
The ECM has been powered for at least 2 seconds. Engine coolant temperature must be above −10 °C (14 °F) in order to allow logging of this diagnostic code.
The value of the parameter is set to the value of the engine coolant temperature.
174-4 Fuel Temperature Sensor : Voltage Below Normal The ECM detects signal voltage that is less than 0.2 VDC for 8 seconds.
The ECM has been powered for at least 2 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.
The ECM has been powered for at least 2 seconds. Ambient temperature must be greater than −35 °C (−31 °F) in order to allow logging of this diagnostic code.
The value of the parameter is set to the value of the engine coolant temperature.
175-4 Engine Oil Temperature Sensor : Voltage Below Normal The ECM detects signal voltage that is less than 0.2 VDC for 8 seconds.
The ECM has been powered for at least 2 seconds. The code is logged.
The value of the parameter is set to the value of the engine coolant temperature.
279-3 Aftercooler Coolant Temperature Sensor (Front) : Voltage Above Normal The ECM detects signal voltage that is greater than 4.95 VDC for 8 seconds.
The ECM has been powered for at least 2 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.
279-4 Aftercooler Coolant Temperature Sensor (Front) : Voltage Below Normal The ECM detects signal voltage that is less than 0.2 VDC for 8 seconds.
The ECM has been powered for at least 2 seconds.
2323-3 Fuel Rail Temperature Sensor : Voltage Above Normal The ECM detects signal voltage that is greater than 4.95 VDC for 8 seconds.
The ECM has been powered for at least 2 seconds. Ambient temperature must be greater than −35 °C (−31 °F) in order to allow logging of this diagnostic code.
The value of the parameter is set to the value of the engine coolant temperature.
2323-4 Fuel Rail Temperature Sensor : Voltage Below Normal The ECM detects signal voltage that is less than 0.2 VDC for 8 seconds.
The ECM has been powered for at least 2 seconds. Ambient temperature must be less than 140 °C (284 °F) in order to allow logging of this diagnostic code.
The value of the parameter is set to the value of the engine coolant temperature.
2526-3 Air Inlet Temperature Sensor : Voltage Above Normal The ECM detects signal voltage that is greater than 4.95 VDC for 15 seconds.
The ECM has been powered for at least 2 seconds. Ambient temperature must be greater than −35 °C (−31 °F) in order to allow logging of this diagnostic code.
The value of the parameter is set to the value of the intake manifold air temperature. If the value of the intake manifold air temperature is less than −30 °C (−22 °F), the value of the parameter is set to −40 °C (−40 °F).
2526-4 Air Inlet Temperature Sensor : Voltage Below Normal The ECM detects signal voltage that is less than 0.2 VDC for 15 seconds.
The ECM has been powered for at least 2 seconds. The code is logged.
The value of the parameter is set to the default value. System OperationUse this procedure to troubleshoot any suspect problems with the following sensors:
Coolant temperature sensor for the engine block outlet
Fuel temperature sensor for the low-pressure fuel
Intake manifold temperature sensor
Oil temperature sensor
Sensor for the turbocharger compressor inlet temperature
Temperature sensor at the water pump outlet for the SCAC
Temperature sensor for the high-pressure fuel systemThe sensor signal for the passive sensors is routed to terminal 1 of each sensor connector. The sensor return for the passive sensors is routed from the ECM terminal 2 of each sensor connector.
Illustration 1 g03332361
Schematic for the analog sensors
Illustration 2 g03345139
Locations of the passive sensors (right side engine view)
(1) Intake manifold temperature sensor
(2) Temperature sensor at the water pump outlet for the SCAC
(3) Fuel temperature sensor for the low-pressure fuel (new location)
(4) Temperature sensor for the high-pressure fuel system
Illustration 3 g01283131
Locations of the passive sensors (front side engine view)
(5) Coolant temperature sensor for the engine block outlet
(6) Engine coolant temperature sensor for the Temperature Control Module (TCM)
Illustration 4 g03307056
Locations of the passive sensors (top