16/02/25, 09.13 SIS 2.
2024/08/28 CAN Data Link - Test (UENR4718-07)
SMCS - 1408 i10264843
Graphical Display PSP
202 -000A
The following is a list of Diagnostic Trouble Codes (DTCs) that are associated with the CAN
data link of the machine.
Table 1
5
01: /02/1 D5A
Graphical Display Module (MID 053) 1 3
UE :11+ 6 D
J1939 CDL
Description
N
© 2 R47 08:00
Diagnostic Trouble Code
System Response
025 18
Programmed Parameter Fault: The Product ID has changed, is not
- 268-2 Erratic, Intermittent, or
Incorrect Cat
programmed, or was not received on the
data link.
erp The Product ID has changed, is not
- 296-9
Transmission Control:
illa programmed, or was not received on the
r In
Abnormal Update Rate
data link.
- 533-9
Brake Control: Abnormal
Update Rate
c. The Product ID has changed, is not
programmed, or was not received on the
data link.
The Product ID has changed, is not
Engine Control Module:
- 590-9 programmed, or was not received on the
Abnormal Update Rate
data link.
The Product ID has changed, is not
VIMS Main Module: Abnormal
- 800-9 programmed, or was not received on the
Update Rate
data link.
The Product ID has changed, is not
Machine Application: Erratic,
- 967-2 programmed, or was not received on the
Intermittent, or Incorrect
data link.
The Product ID has changed, is not
Machine Application: Abnormal
- 967-9 programmed, or was not received on the
Update Rate
data link.
The Product ID has changed, is not
1273- Chassis Control Module:
- programmed, or was not received on the
9 Abnormal Update Rate
data link.
The Product ID has changed, is not
1326- ECM Location Code: Erratic,
- programmed, or was not received on the
2 Intermittent, or Incorrect
data link.
Machine components that directly
2466- Engine Aftertreatment Control
- communicate on this link will be
9 #1: Abnormal Update Rate
unavailable. See electrical schematic.
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Each CAN data link circuit is an input and output of select electronic control modules. The data
link consists of internal control circuits and the connecting harness wiring. The CAN data link is
designed to carry communications between the electronic control modules.
Possible causes for an FMI 02 diagnostic code are:
Intermittent Data Link connection.
The machine harness connectors are in need of repair or replacement.
All the part numbers are not correct.
Possible Causes for an FMI 09 diagnostic code are:
The wrong software is installed on an ECM.
Product ID has not been programmed on the machine ECM or is invalid.
The Graphical Display is operating intermittently.
Terminating resistors on the J1939 data link are faulty.
There is an open or a poor connection in the data link circuit.
There is a short in the data link circuit.
There is excessive noise on the data link circuit.
The machine ECM is not powering up or powering down properly.
There is a lack of key switch input on the machine ECM.
The machine ECM has failed. This condition is unlikely.
Note: A loss of power to an ECM can cause the Graphical Display to activate this
diagnostic code combination. Ensure that the ECMs with this diagnostic code are
powered up before proceeding with this procedure.
An FMI 09 means that the Graphical Display has lost all communication with another control
module.
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Illustration 1 g06205354
Note: The diagram above is a simplified schematic of the Graphical Display connections. The
schematic is electrically correct. However, not all the possible harness connectors are shown.
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For the complete schematic, refer to the latest revision of the machines Electrical Schematic.
Diagnostic Trouble Code Procedure
Table 2
Required Tools
Tool Part Number Description Qty
237-5130 Digital Multimeter Group 1
8T-3224 Needle Tip Group 1
T1
7X-1710 Multimeter Probe Group 1
8T-8726 Cable Assembly (Three Pin) (3-Pin Breakout) 1
JERD2129 Cat® Electronic Technician (ET) 1
T2 Windows-based PC 1
538-5051 Communication Adapter Gp 1
T3 6V-4148 Connector Repair Kit (Sure Seal) 1
T4 190-8900 Connector Field Repair Kit (Deutsch) 1
T5 175-3700 Connector Repair Kit Deutsch DT 1
Prior to beginning this procedure, inspect the harness connectors that are involved in this
circuit. Poor connections can often be the cause of a problem in an electrical circuit. Verify that
all connections in the circuit are clean, secure, and in good condition. Check the wiring
harness for pinch points or abrasions. Look for and repair areas that indicate wires are
exposed. If a problem with a connection is found, correct the problem and verify that the DTC
is active before performing a troubleshooting procedure.
1. Identify the active FMI associated with the DTC.
2. After determining which FMI is present, use the list below to determine which procedure to
follow:
FMI 9, proceed to "FMI 9".
FMI 2
Table 3
Identify The Active FMI Code Associated With The CAN Data Link
Troubleshooting Test Steps Values Results
1. Connect Cat ® Electronic Technician No CAN data Result: CAN data link FMI 02 is
(Cat ET) Service Tool. link code. not present.
2. Check for codes. STOP.
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Repair: CAN data link FMI 02 is
present.
Proceed to "Check Connections
And Harness" Table 4.
Table 4
Check Connections And Harness
Troubleshooting Test Steps Values Results
Result: Connections and harness are
good.
A. Connectors
are: Proceed to "Check The Data Link For
* Clean An Open" Table 5.
* Secure
1. Inspect the circuit harness
* In good Result: A connection or harness
connectors(1).
condition problem exists.
2. Inspect the harness.
B. Harness is Repair: Correct all connection and
not: harness problems.
*Kinked Verify that the problem has been
*Chaffed corrected.
STOP.
(1) See Testing and Adjusting, "Electrical Connector - Inspect".
Table 5
Check The Data Link For An Open
Troubleshooting Test Steps Values Results
Result: The resistance is
< 5 Ω.
1. Turn off the key switch and the battery
disconnect switch.
Proceed to "Check The
Resistance Of The Data
2. Disconnect the harness connector from the
Link" Table 6.
ECM. The
resistance is <
Result: The resistance is
3. At the disconnected connector, connect a 5 Ω.
≥ 5 Ω.
jumper wire between CAN positive contact and
CAN negative contact.
Repair: Repair or replace
the harness.
4. Measure the resistance from the ECM.
STOP.
Table 6
Check The Resistance Of The Data Link
Troubleshooting Test Steps Values Results
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Result: The resistance is
1. Key Start switch and Disconnect switch approximately 60 Ω.
remain OFF.
Proceed to "Check The
2. Harness remains disconnected from the Data Link For A Short"
ECM. Table 7.
The resistance is
3. Remove the jumper that was installed in approximately 60 Result: The resistance is
the previous step. Ω. not approximately 60 Ω.
4. At the disconnected harness connector of Repair: Replace the
the ECM, measure the resistance between resistors. Verify that the
CAN positive contact and CAN negative problem is corrected.
contact.
STOP.
Table 7
Check The Data Link For A Short
Troubleshooting Test Steps Values Results
Result: The resistance is
1. Key start switch and disconnect switch ≥ 4k Ω.
remain OFF.
Proceed to "Check The
2. Harness remains disconnected from the Diagnostic Code" Table
ECM. 8.
The resistance
3. At the ECM, measure the resistance between is ≥ 4k Ω. Result: A resistance is <
CAN positive contact and a ground point. 4k Ω.
4. Measure the resistance between CAN Repair: Repair or
positive contact and all the other circuits that replace the harness.
are used.
STOP.
Table 8
Check The Diagnostic Code
Troubleshooting Test Steps Values Results
Result: Diagnostic code is
not present.
1. Reconnect all harness connectors.
STOP.
2. Turn ON the Disconnect switch and
the Key Start switch. Diagnostic code is Result: Diagnostic code is
not present. present.
3. Operate the machine.
Repair: Contact your
4. Check if diagnostic code is active. technical communicator.
STOP.
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FMI 9
Table 9
Identify The Active FMI Code Associated With The CAN Data Link
Troubleshooting Test Steps Values Results
Result: CAN data link FMI 09 is
not present.
STOP.
1. Connect Cat ® Electronic Technician
(Cat ET) Service Tool. No CAN data
Repair: CAN data link FMI 09 is
link code.
present.
2. Check for codes.
Proceed to "Check Connections
And Harness" Table 10.
Table 10
Check Connections And Harness
Troubleshooting Test Steps Values Results
Result: Connections and harness are
good.
A. Connectors
are: Proceed to "Check The Data Link For
* Clean An Open" Table 11.
* Secure
1. Inspect the circuit harness
* In good Result: A connection or harness
connectors(1).
condition problem exists.
2. Inspect the harness.
B. Harness is Repair: Correct all connection and
not: harness problems.
*Kinked Verify that the problem has been
*Chaffed corrected.
STOP.
(1) See Testing and Adjusting, "Electrical Connector - Inspect".
Table 11
Check The Data Link For An Open
Troubleshooting Test Steps Values Results
1. Turn off the key switch and the battery The Result: The resistance is <
disconnect switch. resistance is < 5 Ω.
5 Ω.
2. Disconnect the harness connector from the Proceed to "Check The
ECM. Resistance Of The Data
Link" Table 12.
3. At the disconnected connector, connect a
jumper wire between CAN positive contact and Result: The resistance is ≥
CAN negative contact. 5 Ω.
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4. Measure the resistance from the ECM. Repair: Repair or replace
the harness.
STOP.
Table 12
Check The Resistance Of The Data Link
Troubleshooting Test Steps Values Results
Result: The resistance is
1. Key Start switch and Disconnect switch approximately 60 Ω.
remain OFF.
Proceed to "Check The
2. Harness remains disconnected from the Data Link For A Short"
ECM. Table 13.
The resistance is
3. Remove the jumper that was installed in approximately 60 Result: The resistance is
the previous step. Ω. not approximately 60 Ω.
4. At the disconnected harness connector of Repair: Replace the
the ECM, measure the resistance between resistors. Verify that the
CAN positive contact and CAN negative problem is corrected.
contact.
STOP.
Table 13
Check The Data Link For A Short
Troubleshooting Test Steps Values Results
Result: The resistance is
1. Key start switch and disconnect switch
≥ 4k Ω.
remain OFF.
Proceed to "Check The
2. Harness remains disconnected from the
Diagnostic Code" Table
ECM.
14.
The resistance
3. At the ECM, measure the resistance
is ≥ 4k Ω. Result: A resistance is <
between CAN positive contact and a ground
4k Ω.
point.
Repair: Repair or replace
4. Measure the resistance between CAN
the harness.
positive contact and all the other circuits that
are used.
STOP.
Table 14
Check The Diagnostic Code
Troubleshooting Test Steps Values Results
1. Reconnect all harness connectors. Diagnostic code is Result: Diagnostic code is
not present. not present.
2. Turn ON the Disconnect switch and
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the Key Start switch. STOP.
3. Operate the machine. Result: Diagnostic code is
present.
4. Check if diagnostic code is active.
Repair: Contact your
technical communicator.
STOP.
PSP-000AD5AD
2025/02/16
01:11:15+08:00
i07038788
© 2025 Caterpillar Inc.
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