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E3 - Engine Does Not Develop Full Power Diagnostic Procedure
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1 E3 - Preliminary Check
Before using this diagnostic procedure, check the following that could cause or be mistaken as low power:
1. Ensure fuel quantity and quality are OK. See CHECK FUEL SUPPLY QUALITY later in this Group.
2. Check for plugged air and fuel filters.
3. Check for transmission problems.
4. Check for engine mechanical problems.
5. Check for excessive load on the engine.
6. Check for unbalanced ballast.
Problems found:
GO TO 2
No problems found:
Repair and retest.
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2 Active DTC Test NOTE: Some DTCs may cause the ECU to derate the engine, which would cause low power.
1. Connect the DST or SERVICE ADVISOR. For instructions on connecting to the DST or SERVICE ADVISOR, see CONNECTING TO DIAGNOSTIC SCAN TOOL (DST) OR SERVICE ADVISOR in Group 160 later in this manual.
2. Ignition ON, engine OFF
3. Start the ECU communication software
4. Ignition ON, engine idling
5. Read DTCs using DST or SERVICE ADVISOR.
No active DTCs:
GO TO 3
Active DTC(s) present:
Diagnose active DTCs first.
SERVICE ADVISOR is a trademark of Deere & Company
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04
1. Operate engine at full load rated speed.
2. Under these conditions, determine type of exhaust emitted.
Small amount or no exhaust smoke:
GO TO 4
Heavy white exhaust smoke:
See E4 - ENGINE EMITS EXCESSIVE WHITE EXHAUST SMOKE DIAGNOSTIC
PROCEDURE later in this Group.
Heavy black or gray exhaust smoke:
See E5 - ENGINE EMITS EXCESSIVE BLACK OR GRAY EXHAUST SMOKE DIAGNOSTIC PROCEDURE later in this Group.
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4 Torque Curve Selection Check
NOTE: This check is not required for applications that either do not select multiple torque curves or use torque curve selection over the Controller Area Network (CAN).
For these applications, GO TO 5
1. Recreate the conditions of the low power complaint.
2. Read the torque curve number.
3. Compare the torque curve parameter to the appropriate torque curve chart. The ECU has the ability to operate on multiple torque curves selected by certain operating conditions. See APPLICATION SPECIFICATIONS in Section 06, Group 210 of this manual and refer to the corresponding torque curve for your application.
Torque curve number displayed is correct for the operating
conditions of the low power complaint:
Refer to machine manual to determine components that could prevent the correct torque curve from being selected. grounded circuits in the torque curve selection wiring.
04-150-10
Observable Diagnostics and Tests
NOTE: This check is not required for applications that either do not select different droop modes or use droop mode selection over the Controller Area Network (CAN).
For these applications, GO TO 6
1. Operate engine and attempt to recreate the low power condition.
2. Read the desired speed governor curve and the maximum speed governor curve .
3. Compare governor selection to the appropriate governor mode chart. See APPLICATION SPECIFICATIONS in Section 06, Group 210 of this manual and refer to the corresponding maximum speed and desired speed governor curves for your application.
Refer to machine manual to determine components that could prevent the correct governor droop grounded circuits in the droop mode selection wiring.
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6 Compression and Misfire Test
1. Using the DST or Service ADVISOR, perform the Compression Test. For instructions, see ENGINE TEST INSTRUCTIONS - COMPRESSION TEST in Section 04, Group 160 of this manual.
2. Make note of the results.
3. Using the DST or Service ADVISOR, perform the Misfire Test. For instructions, see ENGINE TEST INSTRUCTIONS - MISFIRE TEST in Section 04, Group 160 of this manual.
4. Make note of the results.
All cylinders scored within 10% of each other:
GO TO 7
One or more cylinders scored 10% or more lower than other
7 Throttle Test 1. Operate engine at full load rated speed.
2. At these operating conditions, read throttle position data parameter.
97% or above:
GO TO 8
Below 97%:
Refer to your machine manual and perform the throttle calibration procedure; then retest.
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04
Check Turbo Boost pressure. See MEASURE INTAKE MANIFOLD PRESSURE (TURBOCHARGER BOOST/POWER CHECK) in Section 04, Group 150 of 4.5L &
6.8L Diesel Engine Base Engine Manual (CTM104).
Intake manifold pressure in range or above compared to boost specifications:
See F1 - FUEL SUPPLY SYSTEM CHECK DIAGNOSTIC
PROCEDURE later in this Group.
Check the following that could cause reduces boost pressure:
• Restricted air cleaner
• Intake air leak
• Exhaust air leak
• Restriction in exhaust
• Faulty turbocharger. See TURBOCHARGER INSPECTION in Section 02, Group 080 in 4.5L & 6.8L Diesel Engine Base Engine Manual (CTM 104).
None of the problems found:
10 Fuel Supply System Test
Check fuel supply system. See F1 - FUEL SUPPLY SYSTEM CHECK DIAGNOSTIC PROCEDURE later in this Group.
No fuel supply system problems:
Observable Diagnostics and Tests
2. Remove rocker arm cover.
NOTE: Rocker arm cover gasket is reusable if no visible damages is detected. Do NOT store cover on gasket surface.
3. Check EI rocker arms and valve rocker arm operation.
NOTE: Verify that hold down clamps are positioned correctly.
4. Check that the hold down clamp cap screws on all EIs are tightened and torque turned to specification. See INSTALL ELECTRONIC INJECTORS (EIs) in Section 02, Group 090 earlier in this manual.
5. Inspect EI harness and EI harness connector for damage.
All components
Check valve lash. See CHECK AND ADJUST VALVE CLEARANCE in Section 02, Group 021 of the 4.5L & 6.8L Diesel Engine Base Engine Manual (CTM 104).
Valve clearance on one or more valves out of specification:
GO TO 13
Valve clearance on all valves within
specification:
Faulty high pressure fuel pump
Adjust valve clearance. See CHECK AND ADJUST VALVE CLEARANCE in Section 02, Group 021 of the 4.5L & 6.8L Diesel Engine Base Engine Manual (CTM 104).
Low power complaint is no longer present.
If problem still exist:
Faulty high pressure fuel pump
OR Faulty ECU
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