TECHNICAL INFORMATION
5 - 9
DDEC III Diagnostic Codes
To Read Codes:
Use a diagnostic data reader plugged in receptacle on the bottom of side panel of L.H. control panel or mo-
mentarily depress the Stop engine
OVERRIDE
switch (located on the L.H. lower control panel) with the igni-
tion on, engine at idle or not running. Active codes will be flashed on the stop engine telltale (located on cen-
tral dashboard), followed by the inactive codes being flashed on the check engine telltale (located on central
dashboard). The cycle repeats until the operator depresses again the Stop engine
OVERRIDE
switch. A
code
43
consists of four flashes, followed by a short pause, then three flashes in quick succession.
DDC Code
Number
(Flashed)
Description
DDC Code
Number
(Flashed)
Description
11
Variable speed governor sensor
voltage low
12
Variable speed governor sensor
voltage high
13
Coolant level circuit failed low
14
Intercooler temperature circuit failed
high
14
Coolant temperature circuit failed high
14
Oil temperature circuit failed high
15
Intercooler temperature failed low
15
Coolant temperature circuit failed low
15
Oil temperature circuit failed low
16
Coolant level circuit failed high
17
Bypass position circuit failed high
18
Bypass position circuit failed low
21
EFPA circuit failed low
22
EFPA circuit failed low
23
Fuel temperature circuit failed high
24
Fuel temperature circuit failed low
25
Reserved for "no codes"
26
Aux. shutdown #1 active
26
Aux. shutdown #2 active
27
Air temperature circuit failed high
28
Air temperature circuit failed low
31
Aux. output #3 open circuit (high side)
31
Aux. output #3 short to ground (high
side)
31
Aux. output #4 open circuit (high side)
31
Aux. output #4 short to ground (high
side)
32
SEL open circuit
32
SEL short to battery
33
Turbo boost pressure circuit failed
high
34
Turbo boost pressure circuit failed low
35
Oil pressure circuit failed high
36
Oil pressure circuit failed high
37
Fuel pressure circuit failed high
38
Fuel pressure circuit failed low
41
Too many SRS (missing TRS)
42
Too few SRS (missing SRS)
43
Coolant level low
44
Intercooler temperature high
44
Coolant temperature high
44
Oil temperature high
45
Oil pressure low
46
Battery voltage low
47
Fuel pressure high
48
Fuel pressure low
52
A/D conversion fail
53
Nonvolatile checksum incorrect
53
EEPROM write error
54
Vehicle speed sensor fault
55
J1939 data link fault
