Perkins 1104E Series Troubleshooting Manual page 155

RENR2696-01
A. Disconnect ECM connector J20/P20.
B. Measure the resistance between P20:21 and
P20:37.
C. Measure the resistance between P20:21 and the
engine ground.
D. Measure the resistance between P20:37 and the
engine ground.
Expected Result:
The resistance should be greater than 20,000 ohms.
Results:
•
OK – The resistance is greater than 20,000 ohms.
Proceed to test step 6.
•
Not OK – The resistance is less than 20,000
ohms. There is a short in the wiring harness.
Repair: Repair the connectors or wiring and/or
replace the connectors or wiring.
STOP.
Test Step 6. Check the Resistance
through the Harness.
Illustration 70
A. Measure the resistance between P20:21 and
P20:37 at the MIC.
Expected Result:
The resistance should be less than 10 ohms.
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Troubleshooting Section
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