Perkins 1104E Series - Page 155

RENR2696-01 155
Troubleshooting Section
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 resistanc
e 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. C
heck the Resistan ce
through the H
arness.
g00955140
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.