Page 44 Detroit Diesel DDEC IV On-Highway (A 629 540 50 00) On-board diagnostics, 15.10.2003 DIAGNOSTICS Diagnostics is a standard feature of the DDEC system. The purpose of this feature is to provide information for problem identification and problem solving in the form of a code. The ECM continuously performs self diagnostic checks and monitors the other system components. Information for problem identification and problem solving is enhanced by the detection of faults, retention of fault codes and separation of active from inactive codes. OPERATION The engine-mounted ECM includes control logic to provide overall engine management. System diagnostic checks are made at ignition on and continue throughout all engine operating modes. Sensors provide information to the ECM regarding various engine and vehicle performance characteristics. The information is used to regulate engine and vehicle performance, provide diagnostic information, and activate the engine protection system. Instrument panel warning lights (see Figure 5-5) the Check Engine Light (CEL) (2) and the Stop Engine Light (SEL) (3) warn the engine operator. The CEL (2) is an amber light and the SEL (3) is a red light. The CEL (2) is illuminated and a code is stored if an electronic system fault occurs. This indicates the problem should be diagnosed as soon as possible. The ECM illuminates the CEL (2) and SEL (3) and stores a malfunction code if a potentially engine damaging fault is detected. These codes can be accessed in one of four ways: - Using the Diagnostic Data Reader (DDR) - Flashing the CEL (2) and SEL (3) with the Diagnostic Request Switch (may be combined with Stop Engine Override switch (1) - Using the Detroit Diesel Diagnostic Link™ (DDDL) PC software package - By ProDriver ® , Electronic Fire Commander ™, Electronic Display Module (EDM), or other display 1 3 2
16
Embed
Detroit Diesel DDEC IV On-Highway (A 629 540 50 00) · PDF fileDiagnostics is a standard feature of the DDEC system. ... (2) and SEL (3) and stores a malfunction code if a potentially
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Page 44
Detroit Diesel DDEC IV On-Highway (A 629 540 50 00)
On-board diagnostics, 15.10.2003
DIAGNOSTICSDiagnostics is a standard feature of the DDEC system. The purpose of this feature is to provide information for problem identification and problem solving in the form of acode. The ECM continuously performs self diagnostic checks and monitors the other system components. Information for problem identification and problem solving isenhanced by the detection of faults, retention of fault codes and separation of active from inactive codes.
OPERATIONThe engine-mounted ECM includes control logic to provide overall engine management. System diagnostic checks are made at ignition on and continue throughout all engineoperating modes. Sensors provide information to the ECM regarding various engine and vehicle performance characteristics. The information is used to regulate engine andvehicle performance, provide diagnostic information, and activate the engine protection system. Instrument panel warning lights (see Figure 5-5) the Check Engine Light(CEL) (2) and the Stop Engine Light (SEL) (3) warn the engine operator. The CEL (2) is an amber light and the SEL (3) is a red light.
The CEL (2) is illuminated and a code is stored if an electronic system fault occurs. This indicates the problem should be diagnosed as soon as possible. The ECM illuminatesthe CEL (2) and SEL (3) and stores a malfunction code if a potentially engine damaging fault is detected. These codes can be accessed in one of four ways:
- Using the Diagnostic Data Reader (DDR)- Flashing the CEL (2) and SEL (3) with the Diagnostic Request Switch (may be combined with Stop Engine Override switch (1)- Using the Detroit Diesel Diagnostic Link™ (DDDL) PC software package- By ProDriver ® , Electronic Fire Commander ™, Electronic Display Module (EDM), or other display
13
2
Page 45
Detroit Diesel DDEC IV On-Highway (A 629 540 50 00)
On-board diagnostics, 15.10.2003
There are two types of diagnostic codes:
- An active code- a fault present at the time when checking for codes- An inactive code- a fault which has previously occurred; inactive codes are logged into the ECM and time stamped with the following information:
- First occurrence of each diagnostic code in engine hours- Last occurrence of each diagnostic code in engine hours- Total time in seconds that the diagnostic code was active
Diagnostic Request SwitchThe Diagnostic Request Switch is used to activate the CEL/SEL to flash codes. Active codes are flashed on the SEL (3) and inactive codes are flashed on the CEL (2) (seeFigure 5-6). Inactive codes are flashed in numerical order, active codes are flashed in the order received, most recent to least recent. The Diagnostic Request Switch can alsobe used as the Stop Engine Override (SEO) Switch (1). The codes are flashed out of the ECM connected to the switch.
Figure 5-6 Flash Codes
NOTE:For multi-ECM installations, the Diagnostic Request Switch and SEO are combined on the master ECM. All receiver ECMs have a separate Diagnostic Request Switch.The Diagnostic Request Switch is used to flash codes in the following circumstances:- The engine is not running and ignition is ON- The engine is idlingIn both circumstances, activating and holding the Diagnostic Request Switch will flash out the diagnostic codes.
13
2
Page 46
Detroit Diesel DDEC IV On-Highway (A 629 540 50 00)
On-board diagnostics, 15.10.2003
Diagnostic Request Switch/Stop Engine OverrideIf no separate Diagnostic Request Switch is configured, the SEO Switch (1) serves as both aDiagnostic Request Switch and an SEO Switch.The Diagnostic Request/Stop Engine Override Switch (1) is used to flash codes in the following circumstances:
- The engine is not running and ignition is on- The engine is idling
In both circumstances, activating and releasing the switch will flash out the diagnostic codes; activating andreleasing the switch a second time will stop the ECM from flashing the diagnostic codes. Codes will also ceaseflashing if the engine is no longer at idle. The codes are flashed out of the ECM connected to the switch.
NOTE:For multi-ECM installations, the Diagnostic Request Switch and SEO Switch (1) are combined on the master ECM.All receiver ECMs have a separate Diagnostic Request Switch.
DEFINITIONS AND ABBREVIATIONSParameter Identification Character (PID): A PID is a single byte character used in SAE J1587 messages to identify the data byte(s) that follow. PIDs in the range 0-127identify single byte data, 128-191 identify double byte data, and 192-253 identify data of varying length.
Subsystem Identification Character (SID): A SID is a single byte character used to identify field-repairable or replaceable subsystems for which failures can be detected orisolated. SIDs are used in conjunction with SAE standard diagnostic codes defined in SAE J1587 within PID 194.
Failure Mode Identifier (FMI): The FMI describes the type of failure detected in the subsystem and identified by the PID or SID. The FMI and either the PID or SID combineto form a given diagnostic code defined in SAE J1587 within PID 194.
Flashing Codes: Provides a two digit number (see Figure 5-6). This code may cover several specific faults. It is provided to advise the operator of the general severity of thefault so the operator can decide if engine operation can continue without damaging the engine.
Refer to Appendix A for a list of codes, the code number when flashed, the SAE J1587 number and a description of each code.
1
Page 47
Detroit Diesel DDEC IV On-Highway (A 629 540 50 00)
On-board diagnostics, 15.10.2003
Figure 5-17 Series 60 1999 Model Year Engine Overtemperature Protection and Shutdown
ENGINE PROTECTION SWITCHES
The SEO (1)/Diagnostic Request switch can be combined. A separate Diagnostic Request switch is an option.
NOTE:EOP is active even if engine protection is configured for Warning only for the Series 60, Series 50, and Series 2000 engines.
Diagnostic Request Switch
The Diagnostic Request switch is used to activate the CEL (2) and SEL (3) to flash codes. The SEL (3) will flash the active codes and the CEL (2) will flash the inactive codes.
13
2
Page 48
Detroit Diesel DDEC IV On-Highway (A 629 540 50 00)
On-board diagnostics, 15.10.2003
The Diagnostic Request switch is used to flash codes when:
- The engine is not running and ignition is on- The engine is idling and not in an "engine protection" condition
Activating and releasing the switch will flash out the diagnostic codes for either condition. Activating and releasing the switch a second time will stop the ECM from flashingthe diagnostic codes. Codes will also cease flashing if the engine is no longer at idle.
STOP ENGINE OVERRIDE OPTIONSTwo types of stop engine overrides are available, Momentary Override and Continuous Override. Continuous Override has two options. These types are dependent uponspecific engine applications. The ECM will record the number of times the override is activated after a fault occurs.
Momentary Override - An SEO switch (1) is used to override the shutdown sequence. This override resets the 30 second shutdown timer, restoring power to the level whenthe SEL (3) was illuminated. The switch must be recycled after five seconds to obtain a subsequent override.
NOTE:The operator has the responsibility to take action to avoid engine damage.
13
2
Page 49
Detroit Diesel DDEC IV On-Highway (A 629 540 50 00)
On-board diagnostics, 22.07.2003
Detroit Diesel DDEC IV On-Highway
DDEC IV ON-HIGHWAY APPLICATION AND INSTALLATION
A PPENDIX A : CODES (A 629 540 50 00)
The codelisted may not be used in all applications. A default value in the normal operating rangeis used by the ECM to provide for engine operation if a sensor failure is present.
DDC Code #(Flashed)
PID SID FMI Description
11 187 -- 4 Variable Speed Governor Sensor Voltage Low
11 187 -- 7Variable Speed Governor Switch System NotResponding
12 187 -- 3 Variable Speed Governor Sensor Voltage High
13 111 -- 4 Coolant Level Sensor Input Voltage Low
48 412 – 1 EGR Temperature Low (Release 33.0 or later)
49 351 – 0TCI Temperature Above Range(Release 33.0 or later)
49 404 — 0Turbo Compressor Out Temperature High(Release 32.0 or later)
51 351 – 3TCI Temperature Circuit Failed High(Release 33.0 or later)
51 404 — 3Turbo Compressor Out Temperature Sensor InputVoltage High (Release 32.0 or later)
52 -- 254 12 A/D Conversion Fail
53 -- 253 2 Nonvolatile Checksum Incorrect
53 -- 253 12 EEPROM Write Error
53 -- 253 13 Out of Calibration
54 84 -- 12 Vehicle Speed Sensor Fault
55 -- 216 14Other ECU Fault (Release 27.0 or later) (This faultis logged in conjunction with another fault to indicatemissing information from another ECU.)
55 -- 231 12 J1939 Data Link Fault
55 -- 248 8 Proprietary Data Link Fault (Master)
55 -- 248 9 Proprietary Data Link Fault (Receiver)