32773 Mercruiser SCREW, COVER

Table 1
J1939 Code and Description CDL Code and Description Comments
52-3
Engine Intercooler Temperature : Voltage Above Normal 279-3
Aftercooler Coolant Temperature Sensor (Front) : Voltage Above Normal The Electronic Control Module (ECM) detects that the voltage is not in the acceptable range.
The code is logged.
52-4
Engine Intercooler Temperature : Voltage Below Normal 279-4
Aftercooler Coolant Temperature Sensor (Front) : Voltage Below Normal The ECM detects that the voltage is not in the acceptable range.
The code is logged.
105-3
Engine Intake Manifold #1 Temperature : Voltage Above Normal 172-3
Intake Manifold Air Temperature Sensor : Voltage Above Normal The ECM detects that the voltage is not in the acceptable range.
The code is logged.
105-4
Engine Intake Manifold #1 Temperature : Voltage Below Normal 172-4
Intake Manifold Air Temperature Sensor : Voltage Below Normal The ECM detects that the voltage is not in the acceptable range.
The code is logged.
110-3
Engine Coolant Temperature : Voltage Above Normal 110-3
Engine Coolant Temperature : Voltage Above Normal The ECM detects that the voltage is not in the acceptable range.
The code is logged.
110-4
Engine Coolant Temperature : Voltage Below Normal 110-4
Engine Coolant Temperature : Voltage Below Normal The ECM detects that the voltage is not in the acceptable range.
The code is logged.
171-3
Ambient Air Temperature : Voltage Above Normal 3667-3
Aftertreatment #1 SCR Cabinet Air Temperature Sensor : Voltage Above Normal The ECM detects the dosing cabinet temperature sensor reading is not in an acceptable range.
The code is logged.
171-4
Ambient Air Temperature : Voltage Below Normal 3667-4
Aftertreatment #1 SCR Cabinet Air Temperature Sensor: Voltage Below Normal The ECM detects the dosing cabinet temperature sensor reading is not in an acceptable range.
The code is logged.
172-3
Engine Air Inlet Temperature : Voltage Above Normal 2526-3
Air Inlet Temperature Sensor : Voltage Above Normal The ECM detects that the voltage is not in the acceptable range.
The code is logged.
172-4
Engine Air Inlet Temperature : Voltage Below Normal 2526-4
Air Inlet Temperature Sensor : Voltage Below Normal The ECM detects that the voltage is not in the acceptable range.
The code is logged.
175-3
Engine Oil Temperature 1 : Voltage Above Normal 175-3
Engine Oil Temperature Sensor : Voltage Above Normal The ECM detects that the voltage is not in the acceptable range.
The code is logged.
175-4
Engine Oil Temperature 1 : Voltage Below Normal 175-4
Engine Oil Temperature Sensor : Voltage Below Normal The ECM detects that the voltage is not in the acceptable range.
The code is logged.
177-3
Transmission Oil Temperature : Voltage Above Normal 177-3
Transmission Oil Temperature Sensor : Voltage Above Normal The ECM detects that the voltage is not in the acceptable range.
The code is logged.
177-4
Transmission Oil Temperature : Voltage Below Normal 177-4
Transmission Oil Temperature Sensor : Voltage Below Normal The ECM detects that the voltage is not in the acceptable range.
The code is logged.
4337-3
Aftertreatment #1 DEF Doser #1 Temperature : Voltage Above Normal 3608-3
Aftertreatment #1 SCR Dosing Manifold Temperature Sensor : Voltage Above Normal The ECM detects that the voltage is not in the acceptable range.
The code is logged.
4337-4
Aftertreatment #1 DEF Doser #1 Temperature : Voltage Below Normal 3608-4
Aftertreatment #1 SCR Dosing Manifold Temperature Sensor : Voltage Below Normal The ECM detects that the voltage is not in the acceptable range.
The code is logged. The sensor signal for the passive sensor is routed from the Electronic Control Module (ECM) to terminal 1 of each sensor connector. The sensor return for the passive sensors is routed to the ECM from terminal 2 of each sensor connector.Diagnostics on the Cat® Electronic Technician (ET)Wiggle Test - The Wiggle Test allows you to monitor the status of the signals from the sensors.For additional information regarding the Wiggle Test, refer to the documentation that accompanies the Cat ET software.
Illustration 1 g03740747
Primary ECM A4
Illustration 2 g06319939
Primary ECM A5
Illustration 3 g03740749
Secondary ECM A4
Illustration 4 g06319946
Secondary ECM A5
Illustration 5 g03865731
Selective Catalyst Reduction (SCR) controller
Table 2
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Connect Cat® Electronic Technician (ET) to the service tool connector.
B. Determine if a code is active or logged.
Codes
Result: A -3 code is active.
Proceed to Test Step 2.
Result: A -4 code is active.
Proceed to Test Step 3.
Result: For a code that is logged, but not currently active.
Proceed to Test Step 4.
2. Create a Short at the Sensor Connector
A. Turn the keyswitch to the OFF position.
B. Disconnect the sensor with the active -3 code.
C. Install the jumper wire between the following terminals at the sensor connector:
- Terminal 1 (sensor signal) and Terminal 2 (sensor return)
D. Connect Cat ET.
E. Use Cat ET to monitor the following:
- -4 code
F. Turn the keyswitch to the OFF position.
Create a Short
Result: The -3 code remains active.
Repair: There is an open in the wiring harness. Repair or replace the wiring harness.
Verify that the repair eliminated the problem.
Result: A -4 code became active.
Rep