827927A12 FUEL LINE (12 FT.) Mariner
7006201CD, 7008218EW, 7010312DT, 70152374D, 7016207CD, 7031203GD, 7031207CD, 70404119D, 70432037D, 7050302ED, 7055207GD, 7060412ET, 7075217CD, 7100412CD, 7135412ED, 7135412HD, 7150413ED, 7150413HD, 7175423HD, 7200473FD, 7200473GD, 7200473HD, 7225412C
FUEL
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Compatible models:
7006201CD
7008218EW
7010312DT
70152374D
7016207CD
7031203GD
7031207CD
70404119D
70432037D
7050302ED
7055207GD
7060412ET
7075217CD
7100412CD
7135412ED
7135412HD
7150413ED
7150413HD
7175423HD
7200473FD
7200473GD
7200473HD
7225412CD
7225413DD
7F08203HF
7F08261DF
7F15201GD
7F25201GD
7F41452KD
7F50352HD
7F50412DD
Mariner
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Information:
Table 1
Diagnostic Trouble Codes for the Intake Valve Actuators    
J1939 Code    CDL Code    Description    Information    
2950-5     1901-5     Engine Intake Valve Actuator #1 : Current Below Normal     The ECM monitors the current flow through the circuit for each actuator. If low current flow (open circuit) is detected, a -5 diagnostic code is activated. The ECM continues to try to activate the actuator. If high current flow (short circuit) is detected, a -6 diagnostic trouble code is activated. The ECM will disable the solenoid circuit in order to prevent damage from the high current flow. However, the ECM will periodically try to activate the actuator. If the short circuit remains, this sequence of events will be repeated until the problem is corrected.
The ECM takes the following actions while the code is active:
Engine power is derated by ten percent.
The amber warning lamp is illuminated.
These codes are usually caused by a wiring problem. The wiring problem can be on the outside of the engine or underneath the valve cover.    
2950-6     1901-6     Engine Intake Valve Actuator #1 : Current Above Normal    
2951-5     1902-5     Engine Intake Valve Actuator #2 : Current Below Normal    
2951-6     1902-6     Engine Intake Valve Actuator #2 : Current Above Normal    
2952-5     1903-5     Engine Intake Valve Actuator #3 : Current Below Normal    
2952-6     1903-6     Engine Intake Valve Actuator #3 : Current Above Normal    
2953-5     1904-5     Engine Intake Valve Actuator #4 : Current Below Normal    
2953-6     1904-6     Engine Intake Valve Actuator #4 : Current Above Normal    
2954-5     1905-5     Engine Intake Valve Actuator #5 : Current Below Normal    
2954-6     1905-6     Engine Intake Valve Actuator #5 : Current Above Normal    
2955-5     1906-5     Engine Intake Valve Actuator #6 : Current Below Normal    
2955-6     1906-6     Engine Intake Valve Actuator #6 : Current Above Normal    
Follow the troubleshooting procedure in order to identify the root cause of the problem.    System Operation During Engine OperationThe intake valve actuation system does not operate until the engine has reached normal operating temperature. Also, the engine must meet certain operating conditions in order to activate the intake valve actuation system.There are three housings under the valve cover. Each housing contains two actuators. There is a solenoid for each actuator. The ECM sends a command to a solenoid when the ECM requires the intake valves for a cylinder to remain open. The ECM monitors the current flow through the circuit for the solenoid. The ECM activates a diagnostic code if the current flow is below normal or above normal."Intake Valve Actuator Solenoid Test"This test is available on the Caterpillar Electronic Technician (ET). The test helps diagnose problems with the circuits for the solenoids. The following conditions must be met before the test will function:
Engine speed must be zero.
Vehicle speed must be zero.
The transmission gearshift lever must be in neutral.
Illustration 1 g02300033
Schematic for the C15 engine
Illustration 2 g01185728
P2 terminals for the intake valve actuators (18) Actuator 4 return (21) Actuator 5 return (22) Actuator 2 return (31) Actuator 3 return (42) Actuator 6 return (50) Actuator 1 return (58) Actuator 5 & 6 supply (67) Actuator 3 & 4 supply (68) Actuator 1 & 2 supply
Table 2
Troubleshooting Test Steps    Values    Results    
1. Inspect the Electrical Connectors and the Wiring
A. Check the engine harness between the P2 connector and the connectors near the grommets. Look for the following problems:
1. Moisture
2. Loose connectors or damaged connectors
3.Damage that is caused by excessive heat
4. Damage that is caused by chafing
5. Improper routing of wiring
6. Damaged insulation
B.Inspect the connectors near the grommets. The connectors must be clean and dry.
C. Perform a 45 N (10 lb) pull test on each of the wires in the connectors. This test verifies that the wire is properly crimped to the terminal and that the terminal is properly inserted into the connector.
   
Moisture
Damage to connectors    
Result: The wiring is OK.
If you are troubleshooting a -5 code, proceed to Test Step 2.
If you are troubleshooting a -6 code, proceed to Test Step 4.
Result: The wiring is not OK.
Repair the wiring problem. Replace parts, if necessary. Perform the "Intake Valve Actuator Solenoid Test".
If all of the actuators pass the test, troubleshooting is complete. Return the unit to service.
   
2. Short the External Wiring Harness
A.Connect a jumper wire to the engine harness connector. Connect the jumper wire between the appropriate terminals for the supply and for the return of the suspect actuator.
The jumper will replace the actuator and the valve cover wiring harness with a short circuit. Refer to Illustration 1 or Illustration 2.
B. Perform the "Intake Valve Actuator Solenoid Test". Determine the test result for the suspect cylinder.
   
Short Circuit indicated    
Result: The test result indicated "Not Active: Device Open" for the suspect cylinder.
The ECM did not detect the jumper wire. There is an open circuit in the wiring between the valve cover connector and the P2 connector. There may be a problem inside a connector.
Repair the wiring problem. Replace parts, if necessary. Connect all of the electrical connectors.
Perform the "Intake Valve Actuator Solenoid Test". Verify that all of the cylinders pass the test.
Result: The test result indicated "Not Active: Device Short" for the suspect cylinder.
The ECM detected the jumper wire. The external engine wiring harness is OK.
proceed to Test Step 3.
   
3. Inspect Wiring Under the Valve Cover
A. Remove the valve cover. Look for these problems:
1. Loose connectors or damaged connectors
2.Damage that is caused by excessive heat
3. Damage that is caused by chafing
4. Improper routing of wiring
5. Damaged insulation
Repair any wiring problems. Replace parts, if necessary.
Connect all of the electrical connectors.
Perform the "Intake Valve Actuator Solenoid Test".
   
Damage to wires or connectors    
Result: The suspect cylinder passed the test. the problem is resolved.
Return the engine to service.
Result: The suspect cylinder failed the test.
Replace the appropriate actuator housing.
Verify that all actuators pass the "Intake Valve Actuator Solenoid Test"
Parts fuel Mariner:
80365M
80365M FUEL FILTER
7002207, 7004201, 7005201, 7005207, 7005227, 7008204, 7008208, 7008218EW, 7008226, 7008238, 7008247, 7008425, 7F08203HF, 7F08261DF, 7F10203HD, 7F15201GD
11931M
11931M FUEL FILTER ASSEMBLY
7008218EW, 7008305, 7008425, 7010209, 7015327, 7015529, 7025207PW, 7025208CW, 7025500, 7026226, 7030205, 7030301, 7030320, 7040202, 7040206, 7040207PW, 7040706, 7040716, 7055324, 7055524
827927A 8
827927A 8 FUEL LINE (8 FT.)
7006201CD, 7008218EW, 7010312DT, 70152374D, 7016207CD, 7031203GD, 7031207CD, 70404119D, 70432037D, 7050302ED, 7055207GD, 7060412ET, 7075217CD, 7100412CD, 7135412ED, 7135412HD, 7150413ED, 7150413HD, 7175423HD, 7200473FD, 7200473GD, 7200473HD, 7225412C
87946A16
826634
828126A 2
877565T 1
877565T 1 FUEL FILTER
7F25203JB, 7F25203LB, 7F30203HD, 7F30203LB, 7F40203UD, 7F40203ZZ, 7F40213UZ, 7F40452KD, 7F40452LB, 7F41452KB, 7F41452KD, 7F75411JD
826398T 3