Troubleshooting Maxxforce 15
To diagnose the fault you must use SerciveMaxx or NED software
Condition
SPN 27 FMI 0: EGRP Fault: Over Temperature
Possible Causes
- EGR overheated
- Low coolant flow through EGR
- Hot soaking after hard run and shut down
- Low coolant level
- Failed Coolant Flow Valve (CFV)
Troubleshooting Steps (Maxxforce 15)
WARNING: To prevent personal injury or death, stay clear of rotating parts (belts and fan) and hot
engine surfaces.
1- Using the diagnostic tool with diagnostic software, load the Actuator session.
2- Select EGR Position from the Actuator drop-down menu on the right side.
– Command actuator movement by clicking on the Start Test Button. Monitor EGR Position (EGRP)
and EGR Valve CTL (EGRC).
– If EGRP does not closely match EGRC, check EGR valve for mechanical problem.
– If EGR valve does not move, continue to Connector Voltage Check.
Connector Voltage Check – EGR Valve Disconnected
Connect Breakout Harness 6016 to engine harness. Leave EGR valve disconnected. Use the diagnostic
tool to measure voltage.
Step 1: Test Point: 4 to battery positive
- Specification: B+
Are measurements within specifications?
Yes: Do Operational Voltage Check (Step 2).
No: If < B+, check for OPEN in GND circuit. Do Harness Resistance Check (Step 3).
Step 2: Test Point: 3 to GND
- Specification: B+
Are measurements within specifications?
Yes: Do Operational Voltage Check (Step 2).
No: If < B+, check for OPEN in SWBAT circuit or blown fuse.
Step 3: Test Point: 2 to GND
- Specification: 5.0 V ± 1.0 V
Are measurements within specifications?
Yes: Do Operational Voltage Check (Step 2).
No: If > 6 V, check for short to PWR. If < 4 V, check for OPEN or short to GND. Do Harness Resistance Check (Step 3)
Step 4: Test Point: 1 to GND
- Specification: 0 V – 1 V
Are measurements within specifications?
Yes: Do Operational Voltage Check (Step 2)
No: If > 1 V, check for short to PWR
Operational Voltage Check
Note: Ensure battery voltage is at or above 12 V before running this procedure.
1) Connect breakout harness 6016 between EGR valve and engine harness.
2) Use diagnostic tool to load the Actuator session.
3) Command EGRP to 5% and then 95% and measure voltage.
Step 1: Test Point: 2 to GND
- Specification: 5% = 3.0 V ± 1.0 V
Are measurements within specifications?
Yes: If voltage checks are within specifications check for DTC’s. If the DTC returns, replace the EGR Valve.
No: If > 4.0 V, check for Open or short to PWR. If < 2.0 V, check for short circuit or failed EGR valve.
Step 2: Test Point: 2 to GND
- Specification: 95% = 0.8 V ± 0.5 V
Are measurements within specifications?
Yes: If voltage checks are within specifications check for DTC’s. If the DTC returns, replace the EGR Valve.
No: If > 8.5 V, check for short to PWR. If < 6.5 V, check for short circuit.
Step 4: Test Point: 1 to GND
- Specifications: 95% = 0.5 V ± 0.5 V
Are measurements within specifications?
Yes: If voltage checks are within specifications check for DTC’s. If the DTC returns, replace the EGR Valve.
No: If > 1.0 V, check for OPEN circuit or failed EGR valve.
