Detroit Diesel DDEC VI Application And Installation page 414

COMMUNICATION PROTOCOLS
DM1 – Active Diagnostic Trouble Codes
Transmission /
Reception Rate:
Data Length:
Data Page:
PDU Format:
PDU Specific:
Default Priority:
PGN:
Byte: 1
Byte: 2
Byte: 3
Byte: 4
Byte: 5
Byte: 6
6-38
Whenever a DTC becomes an active fault and at a normal update rate
of one second or longer, and then becomes inactive, a DM1 message
will be transmitted to reflect this state change. If a different DTC
changes state within one second update period, a new DM1 message is
transmitted to reflect this new DTC.
Variable
0
254
202
6
65226 (0x00FECA)
Bits: 8–7 Malfunction Indicator Lamp Status (SPN 1213)
00: Lamp Off
01: Lamp On
10: Error
11: Not Available
Bits: 6–5 Red Stop Lamp Status (SPN 623)
00: Lamp Off
01: Lamp On
10: Error
11: Not Available
Bits: 4–3 Amber Warning Lamp Status (SPN 624)
00: Lamp Off
01: Lamp On
10: Error
11: Not Available
Bits: 2–1 Protect Lamp Status (SPN 987) – N/A
Bits: 8–1 Reserved for SAE assignment Lamp Status
Bits: 8–1 SPN, 8 least significant bits of SPN (SPN 1214)
(most significant at bit 8)
Bits: 8–1 SPN, second byte of SPN
(most significant at bit 8)
Bits: 8–6 SPN, 3 most significant bits
(most significant at bit 8)
Bits: 5–1 FMI (SPN 1215)
(most significant at bit 5)
Bit: 8 SPN Conversion Method (SPN 1706)
Bits: 7–1 Occurrence Count (SPN 1216)
7SA827 0701 Copyright © 2007 DETROIT DIESEL CORPORATION
All information subject to change without notice. (Rev. 01/07)