Section 4.3
Reading Codes With Diagnostic Data Reader
Flash codes are used for operator convenience to advise of an engine fault or sensor failure. SAE specific codes are read with the Diagnostic Data Reader (DDR). In some cases, one flash code may be used to cover more than one component fault. For this reason the DDR (or Diagnostic Data Link, DDL) must be used to identify the specific code.
The Diagnostic Code Menu selections are defined as follows.
- Active codes
- Inactive codes
- Clear codes
To read codes, start with the Menu Selection screen.
- To call up active codes:
- Select ENGINE and ENTER three times.
- To call up inactive codes:
- Select ENGINE and ENTER twice.
- Select INACTIVE CODES and ENTER.
- To clear codes:
- Select ENGINE and push ENTER twice.
- Go down and select CLEAR CODES and ENTER.
- Left to YES, and ENTER.
- Wait and then push FUNC three times.
- Go to lines 1 and 2 of the Engine Data List, Active and Inactive Codes, and verify that both lines display NO.
Section 4.3.1
Active Codes
Active codes are conditions that are presently occurring and causing the CEL to be illuminated. All current active codes will be displayed for the entire system, including single, dual and triple ECM applications. The display for each code is as follows:
Line 1: ## MID: XXX XXXXXXXX
Line 2: PID Description
Line 3: FMI Description
Line 4: ↑ A## PID: XXX FMI: XX ↓
Explanation:
##: Indicates the DDC diagnostic flash code number
MID: Message Identification Character
PID: Parameter Identification Character
FMI: Failure Mode Identifier
A##: Numerical count of active codes
↑↓: Indicates additional codes are stored in ECM memory
Section 4.3.2
Inactive Codes
Inactive codes are faults that have occurred previously. All current inactive codes will be displayed for the entire system, including single, dual, and triple ECM applications. The display for each code is as follows:
SCREEN #1; SCREEN #2
Line 1: ## MID: XXX XXXXXX XX ; Line 5: 1st: Last:
Line 2: PID Description; Line 6: Total#:
Line 3: FMI Description; Line 7: Total Time:
Line 4: ↑ |## PID: XXX FMI: XX ↓; Line 8: Min/Max:
Explanation:
##: Indicates the DDC diagnostic flash code number
|##: Numerical Count of inactive codes
1st: First occurrence of the diagnostic code in engine hours
Last: Last occurrence of the diagnostic code in engine hours
Total#: Total number of occurrences
Total Time: Total engine seconds that the diagnostic code was active
Min/Max: Minimum/Maximum value recorded during diagnostic condition
Section 4.3.3
Clear Codes
This feature allows diagnostic codes stored in the ECMs to be erased. An audit trail of when the codes were last erased will be displayed in engine hours.
Engine Hours of Last Clear Codes: XXXX
Section 4.3.4
Message Identification Descriptions
MID: 128 ENGINE, Single ECM applications
MID: 175 ENGINE, R1 Dual ECM application - engine #2 with first receiver ECM
MID: 183 ENGINE, R2 Triple ECM application - engine #3 w/second receiver ECM
MID: 184 PING, Pilot Injection Natural Gas ECM application
Diagnostic codes with Subsystem Identification Characters (SIDs) that reference Auxiliary Outputs # 1-8 (SIDs: 26, 40, 51, 52, 53, 54, 55, 56) will look up the parameter text description in a table to identify the function assigned to the auxiliary output channel.
Diagnostic codes with SIDs that reference PWM Outputs #1 through #4 (SIDs: 57, 58, 59 & 60) will look up the parameter text description in a table to identify the function assigned to the PWM output channel.
Injector Response Time Codes Long and Injector Response Time Codes Short will use a table of injector numbering to identify the appropriate engine cylinder number.
| DDEC III/IV Single ECM Troubleshooting Guide - 6SE497 |
| Generated on 10-13-2008 |