
Engine Pressure Sensor Open or Short Circuit Test
Connect Electronic Service Tool to Cab Data Link
and check for ACTIVE 5 Volt Sensor Supply Code.
Check for ACTIVE Engine Pressure Sensor OPEN or SHORT
Circuit Code. If the code is not ACTIVE and the Engine is not running
properly, refer to Troubleshooting Without A Diagnostic Code.
ACTIVE
Supply Code
Refer to +5Volt
Pressure Sensor
Supply Voltage
Circuit Test
NO ACTIVE
Supply Codes
ACTIVE
Open or Short
Circuit Code
Turn the ignition key ON, engine OFF. Disconnect the
Sensor Connector with the ACTIVE Short Circuit
Code in order to create an Open Circuit condition.
Measure Sensor Supply Voltage
with multimeter. Reading should be
within 4.5 to 5.5 VDC range.
Active SHORT
Circuit Code
Active OPEN
Circuit Code
NOT
OK
Refer to Inspecting
Electrical Connectors
Check Electrical Connectors and Wiring.
If a Short Circuit code was Active before the sensor
was disconnected and an Open Circuit code became
Active after the sensor was disconnected then
thoroughly inspect the connector for signs of moisture.
Inspect the seals and connect the sensor. If the code
reappears, the sensor or pigtail harness is the problem.
Temporarily connect a new sensor but do not install it
into the engine. If the code is no longer Active with the
new sensor connected, replace the old sensor.
Code Changes
To OPEN Circuit
SHORT Circuit
Code Remains
Refer to +5Volt
Engine Pressure
Sensor Supply
Voltage Circuit
Test
NOT
OK
Supply OK
Install a short circuit between terminal-B and
terminal-C of the Sensor Connector and check
for an ACTIVE Short Circuit code.
OPEN Circuit Code
Active with jumper
If a SHORT Circuit Code appears,
temporarily connect the suspect
sensor. If an OPEN Circuit code returns,
replace the sensor and verify the
diagnostic code does not return.
SHORT Circuit Code
Active with jumper
Disconnect the ECM Connector J2/P2 and check for Active
diagnostic codes. The OPEN Circuit code should be Active with
the harness disconnected. Install a jumper (short) between the
ECM Connector J2 signal terminal and terminal-3. A SHORT
Circuit code should be Active with the jumper installed.
If the OPEN Circuit code is NOT Active with the harness
disconnected, or the SHORT Circuit code is NOT Active
with the jumper (short) installed, temporarily install a
test ECM. If the test ECM resolves the problem,
install the old and verify problem returns. If the test ECM
works and the original ECM does not, replace the ECM.
NOT OK
Remove the sensor signal wire from ECM connector
P2 and the sensor connector. Bypass the signal wiring by
connecting a jumper wire directly from ECM connector P2
to the sensor connector signal terminal. If the Diagnostic
Code disappears with the bypass wire installed, repair or
replace the harness. Otherwise, restart the test procedure.
OK
Engine Temperature Sensor Open or Short Circuit Test
Connect an Electronic Service Tool and check for an ACTIVE
Engine Temperature Sensor OPEN or SHORT Circuit Code.
If the code is not ACTIVE and the Engine is not running
properly, refer to Troubleshooting Without A Diagnostic Code.
ACTIVE
Open or Short
Circuit Code
With the ignition key ON and engine OFF, Disconnect the
Sensor Connector with the ACTIVE Short Circuit Code
in order to create an Open Circuit condition.
Active SHORT
Circuit Code
Active OPEN
Circuit Code
NOT
OK
Refer to Inspecting
Electrical Connectors
Check Electrical Connectors and Wiring.
If a Short Circuit code was Active before the sensor
was disconnected and an Open Circuit code became
Active after the sensor was disconnected then
thoroughly inspect the connector for signs of moisture.
Inspect the seals and connect the sensor. If the code
reappears, the sensor is the problem.
Temporarily connect a new sensor but do not install it
into the engine. If the code is no longer Active with the
new sensor connected, replace the old sensor.
Code Changes
To OPEN Circuit
SHORT Circuit
Code Remains
With the ignition key On and engine OFF, Install a short
circuit between terminal-1 and terminal-2 of the Sensor
Connector and check for an ACTIVE Short Circuit code.
OPEN Circuit Code
Active with jumper
If a SHORT Circuit Code appears,
temporarily connect the suspect
sensor. If an OPEN Circuit code returns,
replace the sensor and verify the
diagnostic code does not return.
SHORT Circuit Code
Active with jumper
Disconnect the ECM Connector J2/P2 and check for Active
diagnostic codes. The OPEN Circuit code should be Active with
the harness disconnected. Install a jumper (short) between the
ECM Connector J2 signal terminal and terminal-18. A SHORT
Circuit code should be Active with the jumper installed.
If the OPEN Circuit code is NOT Active with the harness
disconnected, or the SHORT Circuit code is NOT Active
with the jumper (short) installed, temporarily install a
test ECM. If the test ECM resolves the problem,
install the old and verify problem returns. If the test ECM
works and the original ECM does not, replace the ECM.
NOT OK
Remove the sensor signal wire from ECM connector
P2 and the sensor connector. Bypass the signal wiring by
connecting a wire directly from ECM connector P2 to
the sensor connector signal terminal. If the Diagnostic
Code disappears with the bypass wire installed, repair or
replace the harness. Otherwise, restart the test procedure.
OK
Electronic Service Tool Will Not
Communicate with the ECM
Try to start the Engine.
Connect another Service Tool to the
ECM, but use the same Service Tool
Cables as in the previous step.
Connect Electronic Service Tool to the Cab data link,
turn ignition key switch ON, engine OFF. Attempt
to establish communications with the ECM.
Ensure after-market engine protection
devices (not installed by Caterpillar) are
not active, preventing the ECM or Ignition
Key Switch from receiving battery power.
Connect the Service Tool using a
completely different set of Service
Tool cables.
Either the vehicle wiring or another
device on the vehicle is causing the
communication problem.
Connect a test ECM. Turn the Ignition Key ON,
engine OFF. If the new ECM communicates and
the old ECM does not, reconnect the old ECM
and verify the problem returns. If the new ECM
communicates and the old ECM does not, replace
the ECM. If the new ECM does not communicate,
there is a problem with the cables or the battery.
A new ECM has an unprogrammed
Personality Module. The engine will not start
or communicate until the Personality Module
in the ECM is Flash Programmed.
Disconnect ECM Connector P1 from
the ECM. Use the Service Tool Bypass
Harness as indicated in the Ignition
Key Switch Circuit Test.
Does
not start
Engine starts, but
with the Service Tool
ECM does not
communicate
No Communications
ECM Communicates
ECM does not communicate
No Communications
No Communications
Engine Cranks, But Will Not Start
Does not crank,
refer to engine
will not crank.
Repair
Service
Tool
Refer to the
Ignition
Keyswitch
Circuit Test
Refer
to the
ECM
Memory
Test
Repair
Cables
ECM and Service
Tool Communicate
OK
OK
OK
Not a New ECM
NOT
OK
NOT
OK
NOT
OK
OK
Check ECM power, ground, and keyswitch
connections with the ignition key switch ON.
Battery voltage at ECM Connector J1/P1
terminal-52, 53 and 70, to terminal-65 and 67
should be 11.0 -13.5 VDC for a 12 Volt
system and 22.0 - 27.0 for a 24 Volt system.
Check the Ignition Key Switch status on the Service
Tool. With the Ignition Key Switch ON, the status
should display ON. If the status displays OFF, check
for voltage from the battery. Battery voltage at
ECM Connector J1/P1 terminal-70 to terminal-65
and 67 should be 11.0 -13.5 VDC for a 12 Volt system
and 22.0 - 27.0 for a 24 Volt system.
If the
has been
, connect and check for an
active 252-11 Incorrect Engine Software.
Personality Module
recently
replaced/updated
Observe from Electronic Service
Tool
the engine. An rpm value
should be displayed on the Service Tool.
engine rpm
while cranking
If the Truck is equipped with a , ensure
is not . Turn the
Ignition Key Switch ON, engine OFF, the
CAT ID will indicate Theft Deterrent Active.
CAT ID
Theft Deterrent Active
Monitor the while cranking - if
is present there may be a fuel
supply or quality problem. Check fuel
pressure, priming, and filters.
exhaust stack
no smoke
Check for combustion problems,
mechanical problems or extreme temperatures.
Refer
to the
Engine
Speed/Timing
Circuit Test
OK
OK
OK
OK
OK
NOT
OK
NOT
OK
Refer
to the
Ignition
Keyswitch
Circuit Test
Refer
to the
ECM
Memory
Test
NOTE: Refer to the Electronic Troubleshooting Guide for detailed information.
NOTE: Refer to the Electronic Troubleshooting Guide for detailed information.
NOTE: Refer to the Electronic Troubleshooting Guide for detailed information.
NOTE: Refer to the Electronic Troubleshooting Guide for detailed information.
SENR9535
November 1999
C-12 Truck Engine
Electrical System
9SM1-UP
©1999 Caterpillar
All Rights Reserved
Printed in U.S.A.

Engine Harness Connector P2
ECM AMP Connectors
ECM Side
B
B
A
A
C
C
1
1
2
2
1 2 3 4 5 6
6 5 4 3 2 1
12 11 10 9 8 7
7 8 9 10 11 12
Harness Side
23
31
47
57
14
24
40
48
58 59 60 61 62 63 65 66 67 68 69 70
1 2 3 4 5 6 8 9 10 11 12 13
36
>PEI<
1
14
24
32
40
48
58
13
23
31
39
47
57
70
Harness Side
23
31
47
57
14
24
40
48
58 59 60 61 62 63 65 66 67 68 69 70
1 2 3 4 5 6 8 9 10 11 12 13
36
>PEI<
Vehicle Harness Connector P1
ECM Side
1
14
24
32
40
48
58
13
23
31
39
47
57
70
Deutsch DT Connector Receptacles
Deutsch DT Connector Plugs
C-12 ENGINE HARNESS WIRING DIAGRAM
C-12 VEHICLE HARNESS WIRING DIAGRAM
ENGINE FUEL TEMPERATURE
ENGINE TEMPERATURE SENSOR COMMON
1
2
995-BU
G833-PK
J100 P100
ENGINE COOLANT TEMPERATURE
ENGINE TEMPERATURE SENSOR COMMON
ENGINE INTAKE MANIFOLD AIR TEMPERATURE
ENGINE TEMPERATURE SENSOR COMMON
J103 P103
C967-BU
G833-PK
1
2
A751-YL
G833-PK
995-BU
C967-BU
A751-YL
G833-PK
G832-OR
G827-BU
1
2
J105 P105
E963-BK
E964-WH
E965-BU
E966-YL
1
2
J401 P401
CRANK SPEED/TIMING-
CRANK SPEED/TIMING+
CRANKSHAFT
POSITION SENSOR
E963-BK
E964-WH
E965-BU
E966-YL
CAMSHAFT
POSITION SENSOR
CAM SPEED/TIMING-
CAM SPEED/TIMING+
J402 P402
1
2
INJECTOR COMMON CYLINDERS 1 & 2
INJECTOR COMMON CYLINDERS 3 & 4
INJECTOR COMMON CYLINDERS 5 & 6
INJECTOR CYLINDER 6
INJECTOR CYLINDER 5
INJECTOR CYLINDER 4
INJECTOR CYLINDER 3
INJECTOR CYLINDER 2
INJECTOR CYLINDER 1
RETARDER SOLENOID MED/HI
RETARDER SOLENOID LOW/HI
RETARDER SOLENOID COMMON
P1 J1
ENGINE HARNESS CONNECTOR
44
45
46
55
54
39
38
37
36
10
11
9
ENGINE RETARDER
SOLENOID CYLINDERS
3 & 4 NOTE H
ENGINE RETARDER
SOLENOID CYLINDERS
5 & 6 NOTE H
ENGINE RETARDER
SOLENOID CYLINDERS
1 & 2 NOTE H
P2 J2
TO ECM
MOUNTING
BOLT
5
42
27
17
22
23
26
50
60
30
47
53
4
41
1
51
56
57
67
68
69
70
65
66
52
31
INPUT #17
ENGINE BOOST PRESSURE
ENGINE ATM PRESSURE
ENGINE OIL PRESSURE
ENGINE PRESSURE SENSOR COMMON
ENGINE PRESSURE SENSOR +5V
40
14
24
25
16
3
2
8
19
12
13
43
20
21
61
62
63
64
28
29
15
CRANK SPEED/TIMING NEGATIVE
CRANK SPEED/TIMING POSITIVE
CAM SPEED/TIMING NEGATIVE
CAM SPEED/TIMING POSITIVE
ENGINE COOLANT TEMPERATURE
ENGINE INTAKE MANIFOLD AIR TEMPERATURE
ENGINE FUEL TEMPERATURE
ENGINE TEMPERATURE SENSOR COMMON
INPUT SENSOR COMMON #4
INPUT SENSOR COMMON #3
32
35
33
34
18
59
58
6
7
49
48
SPEEDOMETER
NOTE E
NOTE H
ECM GND STRAP
SENSOR ACCELERATOR
PEDAL POSITION
BK
RD
WH
J403 P403
ACCELERATOR PEDAL SENSOR/SWITCH SENSOR COMMON
+8 V
ACCELERATOR PEDAL POSITION
B
A
C
C977-BU
E716-GY
G879-OR
C983-WH
C984-YL
H795-PK
H795-PK
A/C HIGH PRESSURE SWITCH
N/C
E971-GN
450-YL
451-BR
SIGNAL+
SIGNAL-
TACHOMETER
NOTE E
NOTE H
INPUT #16
CLUTCH PEDAL POSITION SWITCH
E793-BU
E794-YL
INPUT #11 (NOTE L)
INPUT #15 POSITIVE
RETARDER SOLENOID LOW/HI SWITCH
+5V
ENGINE COOLANT LEVEL NORMAL (NOTE G)
ENGINE COOLANT LEVEL LOW (NOTE G)
RETARDER SOLENOID MED/HI SWITCH
INPUT #15 NEGATIVE
VEHICLE SPEED IN POSITIVE (NOTE F)
VEHICLE SPEED IN NEGATIVE
INPUT #8 (NOTE L)
20A
14 AWG GXL
14 AWG GXL
14 AWG GXL
14 AWG GXL
ACCELERATOR PEDAL SENSOR/SWITCH SENSOR COMMON
+8V
ACCELERATOR PEDAL POSITION
22
63
23
2
49
54
PASSIVE
MAGNETIC
VEHICLE SPEED
SENSOR
G808-BU
G809-GN
H795-PK
H795-PK
E717-GN
E716-GY
SET/RESUME SWITCH
NOTE J
ENGINE
BLOCK
41
24
E971-GN
G834-PU
COMPONENTS WITHIN THIS AREA ARE CATERPILLAR PROVIDED
CLUTCH PEDAL POSITION SWITCH N/C
SERVICE BRAKE PEDAL POSITION SWITCH N/C
(PEDAL RELEASED POSITION)
62
64
61
COOLING FAN SOLENOID
CRUISE CONTROL ON/OFF SWITCH
CHECK ENGINE LAMP
GN
YL
OR
ENGINE BOOST PRESSURE
ENGINE PRESSURE SENSOR COMMON
ENGINE PRESSURE SENSOR +5V
P200 J200
A
B
C
WARNING LAMP
TO J1922 DATA LINK CONNECTOR
TO J1922 DATA LINK CONNECTOR
+BAT.
-BAT.
J1587 DL NEGATIVE
J1587 DL POSITIVE
TO J1939 DATA LINK CONNECTOR
TO J1939 DATA LINK CONNECTOR
TO J1939 DATA LINK CONNECTOR
1
2
D
H795-PK
E
C
40
51
55
NOTE C: "SINGLE" WINDING MAGNETIC PICKUP SENSOR RECOMMENDED
F
CAB DIAGNOSTIC TOOL CONNECTOR
B
A
5
4
66
25
32
33
69
68
VEHICLE HARNESS CONNECTOR
TO VEHICLE
COMPONENTS
P2 J2
H795-PK
C985-BU
C986-BR
L994-YL
659-PK
K998-BU
G880-PK
J906-BR
G881-BU
G882-WH
CIRCUITS WITHIN THIS AREA ARE RECOMMENDATIONS
SERVICE BRAKE PEDAL POSITION SWITCH
INPUT SENSOR COMMON #1
INPUT #5 (NOTE L)
INPUT #6 (NOTE L)
INPUT #7 (NOTE L)
SIGNAL-
SIGNAL+
START
ON
OFF
B
S
C
NOTE H
R
45
18
47
6
46
C992-PU
L901-GY
G842-GY
G843-OR
G844-PK
H795-PK
45.5mA MAX
INJECTOR
CYLINDER
NO.6
INJECTOR
CYLINDER
NO.5
C974-PU
C973-GN
E718-PK
E991-GY
G836-WH
G
S
MTRBAT
STARTER
MOTOR
(12V)
CRUISE CONTROL ON/OFF SWITCH
INPUT #3 (NOTE L)
INPUT #4 (NOTE L)
59
60
7
BATTERY 2
C975-WH
K982-YL
G841-GN
N/O
RELAY
H795-PK
C985-BU
C986-BR
SET
RESUME
INPUT #1 (NOTE L)
INPUT #2 (NOTE L)
C978-BR
C979-OR
C977-BU
C992-PU
C975-WH
35
44
56
58
C978-BR
C979-OR
K999-GN
K980-PK
C973-GN
C974-PU
KEY SWITCH
659-PK
GROUND
L994-YL
ALTERNATOR
-
12V
+
-
12V
+ +
P1 J1
12V
INJECTOR
CYLINDER
NO.4
INJECTOR
CYLINDER
NO.3
-
BATTERY 3 BATTERY 1
A746-PK
A747-GY
994-GY
G829-GN
G828-WH
L983-WH
L984-OR
L985-YL
A706-GY
A705-BU
A704-GN
A703-BR
A702-PU
A701-GY
J700-BR
J701-GN
J702-BK
NOTE J: ENGINE BLOCK MUST HAVE A DIRECT WIRE CONNECTION
TO BATTERY(-). THIS CONNECTION CAN BE MADE AT THE
STARTER(-) TERMINAL OR MAINFRAME GROUND LUG
NOTE M: J1922 AND J1939 DATA LINKS MUST BE PROGRAMMED FOR ECM TO
INTERACT ON DATA LINK, J1939 MUST NOT BE PROGRAMMED UNLESS
USED, IF PROGRAMMED WITHOUT PROPER CONNECTION A DIAGNOSTIC
CODE WILL RESULT
G835-OR
G808-BU
G809-GN
G845-PU
J1587 DATA LINK NEGATIVE
J1587 DATA LINK POSITIVE
J1939 DATA LINK SHIELD (NOTE K & NOTE M)
J1939 DATA LINK NEGATIVE (NOTE K & NOTE M)
J1939 DATA LINK POSITIVE (NOTE K & NOTE M)
J1922 DATA LINK POSITIVE (NOTE M)
J1922 DATA LINK NEGATIVE (NOTE M)
UNSWITCHED +BATTERY (NOTE D)
UNSWITCHED +BATTERY (NOTE D)
-BATTERY
-BATTERY
INPUT #9
INPUT #10
INPUT SENSOR COMMON #2
INPUT #14
52
53
65
67
27
26
3
17
E717-GN
101-RD
101-RD
229-BK
229-BK
G933-YL
C453-YL
993-BR
F713-OR
9
8
42
34
50
1
14
48
43
TACHOMETER POSITIVE
TACHOMETER NEGATIVE
OUTPUT #5
OUTPUT #6
OUTPUT #7
OUTPUT #8
38
39
11
19
20
21
57
450-YL
451-BR
G837-YL
G838-BR
G839-BU
G840-PU
L983-WH
L984-OR
L985-YL
A706-GY
A705-BU
A704-GN
A703-BR
A702-PU
A701-GY
J700-BR
J701-GN
J702-BK
NOTE C
NOTE F
GN
YL
OR
ENGINE OIL PRESSURE
ENGINE PRESSURE SENSOR COMMON
ENGINE PRESSURE SENSOR +5V
P201 J201
A
B
C
994-GY
G829-GN
G828-WH
A747-GY
G829-GN
G828-WH
C
B
A
P203 J203
ENGINE ATMOSPHERIC PRESSURE
ENGINE PRESSURE SENSOR COMMON
ENGINE PRESSURE SENSOR +5V
GN
YL
OR
SPEEDOMETER POSITIVE
SPEEDOMETER NEGATIVE
OUTPUT #2
OUTPUT #3
OUTPUT #4
LO
MED
36
37
10
12
13
15
16
12
10
8
6
5
4
3
2
1
11
9
7
J300 P300
ENGINE TIMING CALIBRATION PROBE POSITIVE
ENGINE TIMING CALIBRATION PROBE NEGATIVE
ENGINE TIMING CALIBRATION PROBE POSITIVE
ENGINE TIMING CALIBRATION PROBE NEGATIVE
1
2
A746-PK
G829-GN
G828-WH
HI
ENGINE RETARDER
SOLENOID SELECTOR SWITCH
NOTE H
28
29
30
31
70
NOTE E: THE ECM SPEEDOMETER AND TACHOMETER OUTPUT SIGNAL LINE
VOLTAGES ARE ZERO-CROSSING SQUARE WAVES. THE SPEEDOMETER
SIGNALS AT J1-37 AND J1-36 ARE COMPLEMENTS OF EACH OTHER.
THE TACHOMETER SIGNALS AT J1-38 AND J1-39 ARE COMPLEMENTS
(PEDAL RELEASED POSITION)
G856-WH
G857-YL
HI
CHECK ENGINE LAMP
WARNING LAMP
OUTPUT #1
OUTPUT #9
IGNITION KEY SWITCH
MED
LO
ENGINE RETARDER
SOLENOID
ON/OFF SWITCH
INJECTOR
CYLINDER
NO.1
INJECTOR
CYLINDER
NO.2
NOTE H
INPUT #12
INPUT #13
E793-BU
E794-YL
A249-BK
K990-GN
K900-YL
E721-WH
E720-PK
NOTE L: SENSOR COMMON CONNECTION FOR INPUTS #1 THROUGH #8
AND #11 MAY BE MADE TO EITHER J1-5 OR J1-18, J1-18
IS FOR BODY BUILDER/AFTERMAR KET INSTALLATIONS
OF EACH OTHER. FOR SPEEDOMETERS WITH A SINGLE SIGNAL INPUT
TERMINAL, EITHER ONE OF THE TWO SIGNAL OUTPUT LINES FROM
THE ECM MAY BE USED.
NOTE F: AN ELECTRONIC SIGNAL MAY BE PROVIDED IN PLACE OF A PASSIVE
MAGNETIC SENSOR, THE ELECTRONIC SIGNAL INPUT WILL BE
CONNECTED TO THE +SIGNAL PIN.
NOTE H: A DASHED LINE INDICATES AN OPTIONAL FEATURE NOT AVAILABLE
ON ALL SYSTEMS.
ENGINE BOOST
PRESSURE SENSOR
ENGINE ATMOSPHERIC
PRESSURE SENSOR
ENGINE OIL
PRESSURE SENSOR
ENGINE COOLANT
VOLTAGE SUPPLY WIRES
OUTPUT SIGNAL WIRES
INPUT SIGNAL WIRES
COMMON WIRES
TEMPERATURE SENSOR
ENGINE INTAKE
MANIFOLD AIR
TEMPERATURE SENSOR
ENGINE FUEL
TEMPERATURE SENSOR
J400 P400
TO +BATTERY
ALL SWITCHES ARE SHOWN IN THE OFF POSITION
UNLESS OTHERWISE SPECIFIED:
ALL WIRES TO BE 18 AWG OR LARGER SAE J1128 TYPE SXL
OR EQUIVALENT. FOR TWISTED PAIR SPECIFICATION SEE SAE J1708
PID-FMI Description
Flash
Codes
PID-FMI Description
Flash
Codes
0-00 No Detected Faults 55 105-00 High Intake Manifold Temp Warning 64
1-11 Cylinder 1 Fault 72 105-03 Intake Manifold Temp Sensor Open Circuit 38
2-11 Cylinder 2 Fault 72 105-04 Intake Manifold Temp Sensor Short Circuit 38
3-11 Cylinder 3 Fault 73 105-11 Very High Intake Manifold Temp Warning 64
4-11 Cylinder 4 Fault 73 108-03 Atmospheric Pressure Sensor Open Circuit 26
5-11 Cylinder 5 Fault 74 108-04 Atmospheric Pressure Sensor Short Circuit 26
6-11 Cylinder 6 Fault 74 110-00 High Coolant Temp Warning 61
22-11 Cam Sensor to Crank Sensor Calibration 42 110-03 Coolant Temp Sensor Open Circuit 27
22-13 Check Timing Sensor Calibration 42 110-04 Coolant Temp Sensor Short Circuit 27
30-08 Invalid PTO Throttle Signal 29 110-11 Very High Coolant Temp Warning 61
30-13 PTO Throttle Sensor Calibration 29 111-01 Low Coolant Level Warning 62
41-03 8 Volt Supply Above Normal 21 111-02 Coolant Level Sensor Fault 12
41-04 8 Volt Supply Below Normal 21 111-11 Very Low Coolant Level 62
43-02 Ignition Key Switch Fault 71 121-05 Retarder Solenoid Lo/Hi Open Circuit 14
54-05 Multi-Function Output #6 Open Circuit 66 121-06 Retarder Solenoid Lo/Hi Short Circuit 14
54-06 Multi-Function Output #6 Short Circuit 66 122-05 Retarder Solenoid Med/Hi Open Circuit 14
55-05 Multi-Function Output #7 Open Circuit 67 122-06 Retarder Solenoid Med/Hi Short Circuit 14
55-06 Multi-Function Output #7 Short Circuit 67 168-02 Low or Intermittent Battery Power to ECM 51
64-12 Loss of Engine Cam Sensor RPM Signal 34 171-03 Outside Air Temp Sensor Open Circuit 00
71-00 Idle Shutdown Override 01 171-04 Outside Air Temp Sensor Short Circuit 00
71-01 Idle Shutdown Occurrence 47 171-11 No Ambient Air Temp Data 00
71-14 PTO Shutdown Occurrence 47 174-00 High Fuel Temp Warning 65
84-00 Vehicle Overspeed Warning 41 174-03 Fuel Temp Sensor Open Circuit 13
84-01 Loss of Vehicle Speed Signal 31 174-04 Fuel Temp Sensor Short Circuit 13
84-02 Invalid Vehicle Speed Signal 36 190-00 Engine Overspeed Warning 35
84-08 Vehicle Speed Out of Range 36 190-12 Loss of Engine Crank Sensor RPM Signal 34
84-10 Vehicle Speed Rate of Change 36 191-07 Transmission Not Responding 68
84-14 Quick Stop Occurrence 00 231-11 J1939 Data Link Fault 58
91-08 Invalid Throttle Signal 32 232-03 5 Volt Supply Above Normal 21
91-13 Throttle Sensor Calibration 28 232-04 5 Volt Supply Below Normal 21
100-01 Low Oil Pressure Warning 46 244-02 Event Recorder Data Lost 02
100-03 Oil Pressure Sensor Open Circuit 24 246-11 Brake Switch #1 Fault 00
100-04 Oil Pressure Sensor Short Circuit 24 247-11 Brake Switch #2 Fault 00
100-11 Very Low Oil Pressure 46 249-11 J1922 Data Link Fault 58
102-00 Boost Pressure Sensor Stuck High 25 252-11 Incorrect Engine Software 59
102-03 Boost Pressure Sensor Open Circuit 25 253-02 Check Customer or System Parameters 56
102-04 Boost Pressure Sensor Short Circuit 25 253-11 Check Transmission Customer Parameters 56
Diagnostic Code Listing
