16H Motor Grader ATS00001-UP (MACHINE) POWERED BY 3196 Engine(SEBP3329...
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Product: MOTOR GRADER
Model: 16H MOTOR GRADER ATS00580
Configuration: 16H Motor Grader ATS00001-UP (MACHINE) POWERED BY 3196 Engine
Troubleshooting
3176C and 3196 Engines for Caterpillar Built Machines
Media Number -SENR9515-05 Publication Date -01/05/2007 Date Updated -08/05/2007
i02182948
Cat Data Link Circuit - Test
SMCS - 1408-081; 1900-081
System Operation Description:
The Cat Data Link is a two wire electrical connection that is used for communication between
electronic modules such as the engine Electronic Control Module (ECM), the machine control
module, electronic transmission controls, electronic dash displays, and Caterpillar Electronic
Technician (ET).
Illustration 1 g00813521
Schematic
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Test Step 1. Inspect Electrical Connectors and Wiring
A. Turn the keyswitch to the OFF/RESET position.
B. Thoroughly inspect the J1/P1 ECM connector and all other connectors in the wiring harness.
Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Note: Refer to the Electrical System Schematic for further information about the machine
wiring.
Expected Result:
All connectors, pins, and sockets are completely inserted and coupled. The harness and wiring are free
of corrosion, of abrasion, and of pinch points.
Results:
• OK - Proceed to Test Step 2.
• Not OK -
Repair: Repair the circuit.Verify that the repair eliminates the problem.
STOP
Test Step 2. Check for Shorts in the Harness
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Illustration 2 g00699950
ECM connector P1
A. Disconnect the J1/P1 ECM connector.
B. Disconnect all modules from the Cat Data Link.
C. Disconnect Cat ET from the service tool connector.
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D. Measure the resistance between P1:8 (Cat Data Link +) and P1:9 (Cat Data Link −).
E. Measure the resistance between P1:8 (Cat Data Link +) and chassis ground.
F. Measure the resistance between P1:9 (Cat Data Link −) and chassis ground.
Expected Result:
The resistance is greater than 20,000 Ohms for each measurement.
Results:
• OK - Proceed to Test Step 3.
• Not OK - There is a short circuit in the harness or in a connector.
Repair: Repair the circuit.Verify that the repair eliminates the problem.
STOP
Test Step 3. Check Resistance through the Harness
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Illustration 3 g00699950
ECM connector P1
A. Use a suitable piece of wire to short J62:D (Cat Data Link +) and J62:E (Cat Data Link −) at the
service tool connector.
B. Measure the resistance between P1:8 (Cat Data Link +) and P1:9 (Cat Data Link −).
C. Measure the resistance across the Cat Data Link at the other modules.
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Expected Result:
The resistance ia less than 10 Ohms for each measurement.
Results:
• OK - The Cat Data Link is OK.
Repair: Refer to Troubleshooting, "Electrical Connectors - Inspect" if the problem is
intermittent.
STOP
• Not OK - There is an open circuit or excessive resistance in the harness or in a connector.
Repair: Repair the circuit.Verify that the repair eliminates the problem.
STOP
Copyright 1993 - 2018 Caterpillar Inc. Wed Dec 12 13:32:02 UTC+0800 2018
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