PIN & 7K8456 - Caterpillar

Illustration 1 g06196651The following is a list of codes associated with the data link.
Table 1
Communication Gateway (VIMSTM A5N2 Main ECM)
MID 161
DTC Code Description System Response
296-09 Trans Control - Abnormal Update Rate There is a lack of communication between VIMS and the Trans ECM.
533-09 Brake Control - Abnormal Update Rate There is a lack of communication between VIMS and the Brake ECM.
590-09 Engine Control Module - Abnormal Update Rate There is a lack of communication between VIMS and the Engine ECM.
890-09 Telemetry Data Link - Abnormal Update Rate There is a lack of communication between VIMS and the telematic components.
1273-09 Chassis Control Module - Abnormal Update Rate There is a lack of communication between VIMS and the Chassis ECM.
2448-09 Graphical Display Module - Abnormal Update Rate There is a lack of communication between the Graphical Display Module and the telematic components.
2466-09 Engine Aftertreatment Control - Abnormal Update Rate There is a lack of communication between the Engine Aftertreatment Control and the telematic components.
4255-09 Telemetry Data Link #2 - Abnormal Update Rate The buffer is full, service soon. Each data link circuit:
Is an input and output of select electronic control modules (ECMs).
Is designed to carry communications between the ECMs.
Consists of internal control circuits and the connecting harness wiring.Possible Causes for a Data Link Associated Diagnostic Trouble Code Are:
Buffer is full
Poor ECM connections on the data link
Incorrect ECM hardware or software part numbers
Failed data link harness
Failed ECM on the data link
Table 2
Troubleshooting Steps Values Results
1. Check for Diagnostic Codes
A. Connect Cat® Electronic Technician (Cat ET) to the machine.
B. Check for active codes.
There are no active data link associated codes.
OK - There are no active data link associated codes.
STOP.
Not OK - There are active data link associated codes.
Go to Step 2.
2. Check Connectors
A. Inspect the circuit harness connectors.
Connectors are:
* Clean
* Secure
* In good condition
OK - Connectors are OK.
Go to Step 3.
Not OK - Connectors are not OK.
Repair:
A. Correct any connection problem.
B. Verify that the problem is corrected.
STOP.
3. Check the Hardware Part Numbers and the Software Versions
A. In Cat ET, click "ECM Summary".
B. Check "Software Group" for info(1).
*Hardware is the correct part number
*Software is the latest version.
OK - The hardware and software are correct.
Go to Test Step 4.
NOT OK - The hardware or software is not correct.
Repair:
A. Install correct part number ECMs, if necessary(2).
B. Update the software(3).
C. Clear the diagnostic code.
STOP.
4. Check For Short to Ground
A. Turn OFF the disconnect switch.
B. Disconnect all ECMs from the data link.
C. At the harness connector for the Communication Gateway # 1 ECM, measure the resistance between frame ground and the following harness contacts:
* +Data Link
* -Data Link
The resistance ≥ 5000Ω.
OK - The resistance is correct.
Go to Test Step 5.
NOT OK - The resistance is not correct.
There is a short between frame ground and the data link circuit in the harness.
Repair:
Repair or replace the harness.
STOP.
5. Check For Short to +Battery
A. The disconnect switch remains OFF.
B. All related ECMs remain disconnected from the harness.
C. At the harness connector for the related ECM, measure the resistance between the following harness