0389045 JOHNSON GEARCASE HEAD ASSY

Table 1
J1939 Code and Description CDL Code and Description Comments
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 code is logged.
171-4
Ambient Air Temperature : Voltage Below Normal 3667-4
Aftertreatment #1 SCR Cabinet Air Temperature Sensor : Voltage Below Normal 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.
174-3
Engine Fuel Temperature 1 : Voltage Above Normal 174-3
Fuel Temperature Sensor : Voltage Above Normal The code is logged.
174-4
Engine Fuel Temperature 1 : Voltage Below Normal 174-4
Fuel Temperature Sensor : Voltage Below Normal The code is logged.
175-3
Engine Oil Temperature 1 : Voltage Above Normal N/A The ECM detects the dosing cabinet temperature sensor reading is not in an acceptable range.
The code is logged.
175-4
Engine Oil Temperature 1 : Voltage Below Normal N/A The ECM detects the dosing cabinet temperature sensor reading is not in an acceptable range.
The code is logged.
3468-3
Engine Fuel Temperature 2 : Voltage Above Normal 2323-3
Fuel Rail Temperature Sensor : Voltage Above Normal The code is logged.
3468-4
Engine Fuel Temperature 2 : Voltage Below Normal 2323-4
Fuel Rail Temperature Sensor : Voltage Below Normal 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 g06091102
Primary ECM
Illustration 2 g03740749
Secondary ECM
Illustration 3 g03865731
Selective Catalyst Reduction (SCR) Controller
Illustration 4 g01155187
Terminal locations at the connector for the passive analog sensors
(Terminal 1) Sensor signal
(Terminal 2) Analog sensor return
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. Remove electrical power from the engine.
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. Remove electrical power from the engine.
Create a Short
Result: The -3 code remains active.
Repair: There is an short in the wiring harness. Repair or replace the wiring harness.
Verify that the repair eliminated the problem.
Result: A -4 code became active.
Repair: The wiring harness is OK. Replace the sensor.
Verify that the repair eliminated the problem.
3. Create an Open at the Sensor Connector
A. Remove electrical power from the engine.
B. Disconnect the sensor with the active -4 code.
C. Connect Cat ET.
D. Use Cat ET to monitor the following:
- -3 code
Note: For a 110-3 code, start the engine and let the engine idle for 7 minutes. The engine must be running for at least 7 minutes in order for the diagnostic to run.
E. Remove electrical power from the engine.
Create an Open
Result: The -4 code remains active.
Repair: There is a short in the wiring harness. Repair or replace the wiring harness.
Verify that the repair eliminated the problem.
Result: A -3 code became active.
Repair: The wiring harness is OK. Replace the sensor.
Verify that the repair eliminated the problem.
4. Perform the Wiggle Test
Carefully following this procedure is the best way to identify the root cause of an intermittent problem.
A. Connect Cat ET.
B. Use CAT ET to perform the following test:
- "Wiggle Test"
C. Slowly wiggle the wiring and the connectors between the P2 connector and the sensor. Slowly wiggle the wiring and the connectors between the P1 connector and the sensor. Pay particular attention to the wiring near each connector. Be sure