803593 Mercury PLUG

Table 1
Diagnostic Trouble Codes
J1939 Code and Description Conditions that Generate the Code System Response
52-3 Engine Intercooler Temperature : Voltage Above Normal The ECM detects signal voltage that is greater than 4.95 VDC for 8 seconds. The code is logged.
The value of the parameter is set to a default value.
52-4 Engine Intercooler Temperature : Voltage Below Normal The ECM detects signal voltage that is less than 0.2 VDC for 8 seconds.
105-3 Engine Intake Manifold 1 Temperature : Voltage Above Normal The ECM detects signal voltage that is greater than 4.95 VDC for 8 seconds. The code is logged.
Ambient temperature must be greater than −35 °C (−31 °F) to log this diagnostic code.
The value of the parameter is set to a default value.
105-4 Engine Intake Manifold 1 Temperature : Voltage Below Normal The ECM detects signal voltage that is less than 0.2 VDC for 8 seconds. The code is logged.
Ambient temperature must be less than 140 °C (284 °F) to log this diagnostic code.
The value of the parameter is set to a default value.
110-3 Engine Coolant Temperature : Voltage Above Normal The ECM detects signal voltage that is greater than 4.95 VDC for 8 seconds. The code is logged.
The value of the parameter is set to a default value.
110-4 Engine Coolant Temperature : Voltage Below Normal The ECM detects signal voltage that is less than 0.2 VDC for 8 seconds.
172-3 Engine Air Inlet Temperature : Voltage Above Normal The ECM detects signal voltage that is greater than 4.95 VDC for 8 seconds. The value of the parameter is set to a default value.
172-4 Engine Air Inlet Temperature : Voltage Below Normal The ECM detects signal voltage that is less than 0.2 VDC for 8 seconds.
175-3 Engine Oil Temperature 1 : Voltage Above Normal The ECM detects signal voltage that is greater than 4.95 VDC for 8 seconds. The value of the parameter is set to a default value.
175-4 Engine Oil Temperature 1 : Voltage Below Normal The ECM detects signal voltage that is less than 0.2 VDC for 8 seconds.
177-3 Transmission Oil Temperature : Voltage Above Normal The ECM detects signal voltage that is greater than 4.95 VDC for 8 seconds. The value of the parameter is set to a default value.
177-4 Transmission Oil Temperature : Voltage Below Normal The ECM detects signal voltage that is less than 0.2 VDC for 8 seconds. System OperationUse this procedure to troubleshoot any suspect problems with the following sensors for the primary ECM:
Coolant temperature sensor (Primary & Secondary ECM)
Intake manifold air temperature sensor (Primary & Secondary ECM)
Engine oil temperature sensor (Primary ECM)
Turbocharger inlet temperature sensor (Primary ECM)
SCAC temperature sensor (Primary ECM)
Transmission temperature sensor (Primary & Secondary ECM)This engine utilizes a redundant control system in the case of an ECM failure. If the primary ECM fails, the secondary ECM provides for engine control and engine system monitoring. The secondary ECM utilizes several additional active sensors to monitor engine operation. The following sensors can be found on the engine and are only utilized by the secondary ECM during a failure of the primary ECM:When troubleshooting these sensors, ensure that the secondary ECM is controlling the engine. except for the secondary intake manifold air temperature sensor, each secondary sensor utilizes the same diagnostic code as the primary version of the sensor. The troubleshooting procedure for each secondary passive sensor is the same as the troubleshooting for the primary passive sensors.
Illustration 1 g03065298
Typical primary schematic
Illustration 2 g03065300
Typical secondary schematic
Illustration 3 g03065302
Terminal locations at the P1 ECM connector (prim.) for the passive sensors
(P1-26) Engine oil temperature (prim.)
(P1-17) Compressor inlet air temperature (prim.)
Illustration 4 g03065301
Terminal locations at the P2 ECM connector (prim. & sec.) for the passive sensors
(P2-13) SCAC temperature (prim.)
(P2-17) Return (prim.)
(P2-54) Return (prim.)
(P2-83) Return (prim. & sec.)
(P2-84) Engine coolant temperature (prim. & sec.)
(P2-91) Transmission oil temperature (prim.)
(P2-95) Intake manifold air temperature (prim. & sec.)
Illustration 5 g01155187
Terminal locations at the connector for the passive analog sensors
(Terminal 1) Sensor signal
(Terminal 2) Sensor return
Table 2
Troubleshooting Test Steps Values Results
1. Check for "Active" or "Logged" Diagnostic Codes
A. Connect Caterpillar Electronic Technician (ET) to the service tool connector.
B. Restore the electrical power to the ECM.
C. Monitor the diagnostic codes on Cat ET. Check and record any diagnostic codes.
Note: Wait at least 30 seconds in order for the diagnostic codes to become active.
D. Determine if the problem is active and related to one of the following diagnostic codes:
-3
-4
Codes
Results: No diagnostic codes are active at this time.
Repair: The problem may be intermittent. If the problem is intermittent refer to Troubleshooting, "Electrical Connectors - Inspect"
Results: An active -3 diagnostic code is present.
Proceed to Test Step 2
Results: An active -4 diagnostic code is present.
Proceed to Test Step 4