The ECM monitors and controls engine/vehicle operation and performance, enables vehicle features such as PTO and cruise control to function, communicates engine/vehicle information to the instrument cluster transmission (on vehicles equipped with electronically controlled transmissions) and diagnostic/programming tools. For the ECM, see Figure
“Electronic Control Module”
.
Figure 1. Electronic Control Module
Section 21.1.1
Fault Detection/Management
During normal operation, the ECM automatically performs diagnostic checks upon itself and the total electronic control system. The ECM self tests include memory checks, programming checks, and internal power supply checks for power to the injectors. The ECM is capable of internal fault detection and dependent upon the severity of the problem, can provide fault management strategies to allow limited engine/vehicle operation.
Section 21.1.2
Pass Code — Flash Code Only
The following flash codes could display as part of the self diagnostics:
Section 21.1.2.1
Flash Code 111
ATA code: None
Condition Description: No fault conditions detected.
Note: Can only determine if ECM has detected continuous faults or faults detected during an Output Circuit Check. Faults generated during an On-Demand Test such as Cylinder Contribution Tests can only be accessed by an EST.
Section 21.1.2.2
Flash Code 525, Injector Drive Diagnostics
ATA code: SID 254 FMI 6
Condition Description: Injector driver circuit fault.
Symptoms: Possible hard start/no start or low power condition.
Possible Causes: Shorted engine harness, injector harness or defective ECM.
Actions: Perform injector harness checks in INJ circuit diagnostics; if no defects found, replace ECM and test again.
Section 21.1.2.3
Flash Code 614, ECM Memory/Programming Diagnostics
ATA code: SID 252 FMI 13
Condition Description: EFRC/EECM ING Configuration mismatch.
Symptoms: Possible hard start/no start or low power condition.
Possible Causes: Wrong EFRC (Engine Family Rating Code) selected for the ECM strategy programmed in the module.
Actions: Check EFRC and verify it matches ECM strategy level. Reprogram ECM or change EFRC as necessary.
Section 21.1.2.4
Flash Code 621
ATA code: SID 253 FMI 1
Condition Description: Manufacturing defaults selected.
Symptoms: Very low power (25 hp)
Possible Causes: Programmable parameters for ECM never programmed in module. Most likely to occur in new vehicle or new module.
Actions: Program programmable parameters.
Section 21.1.2.5
Flash Code 622
ATA code: SID 253 FMI 0
Condition Description: Engine using Field Default Rating.
Symptoms: Low power (lowest rating in engine class) and vehicle features not working.
Possible Causes: Programmable parameters for ECM module incorrectly programmed in module.
Actions: Program programmable parameters.
Section 21.1.2.6
Flash Code 623
ATA code: SID 253 FMI 13
Condition Description: Invalid EFRC (Engine Family Rating Code)
Symptoms: Possible hard start/no start or low power condition.
Possible Causes: Wrong EFRC selected for the ECM strategy programmed in the module.
Actions: Check EFRC and verify it matches ECM strategy level. Reprogram ECM or change EFRC as necessary.
Section 21.1.2.7
Flash Code 624
ATA code: SID 240 FMI 14
Condition Description: Field Defaults Active
Symptoms: Low power (lowest rating in engine class) and vehicle features not working.
Possible Causes: Programmable parameters for ECM module incorrectly programmed in module.
Actions: Program programmable parameters.
Section 21.1.2.8
Flash Code 631
ATA code: SID 240 FMI 2
Condition Description: Read Only Memory (ROM) Self Test Fault.
Symptoms: No start.
Possible Causes: Internal ECM problem.
Actions: Replace ECM.
Section 21.1.2.9
Flash Code 632
ATA code: SID 254 FMI 12
Condition Description: RAM Memory — CPU Self Test Fault
Symptoms: No start.
Possible Causes: Internal ECM problem.
Actions: Replace ECM.
Section 21.1.2.10
Flash Code 655
ATA code: SID 240 FMI 13
Condition Description: Programmable Parameter List level incompatible.
Symptoms: No start or run in field defaults.
Possible Causes: Programming problem or internal ECM problem.
Actions: Attempt to program ECM; if does not help, replace the ECM.
Section 21.1.2.11
Flash Code 661
ATA code: SID 240 FMI 11
Condition Description: RAM Programmable Parameter list corrupt.
Symptoms: No start or run in field defaults.
Possible Causes: Internal ECM problem.
Actions: Replace ECM.
Section 21.1.2.12
Flash Code 664
ATA code: SID 253 FMI 14
Condition Description: Calibration level incompatible.
Symptoms: No start or run in field defaults.
Possible Causes: Programming problem or internal ECM problem.
Actions: Attempt to program ECM; if does not help, replace the ECM.
Section 21.1.2.13
Flash Code 665
ATA code: SID 252 FMI 14
Condition Description: Programmable Parameter Memory content corrupt.
Symptoms: No start or run in field defaults.
Possible Causes: Internal ECM problem.
Actions: Replace ECM.
| Series 40E Troubleshooting Manual – 6SE241 |
| Generated on 10-13-2008 |