Perkins 1104E Series Troubleshooting Manual page 170

170
Troubleshooting Section
Illustration 82
Illustration 83
Fuel pump power supply
A. Turn the keyswitch to the OFF position.
B. Disconnect the P1 ECM connector and the P40
fuel injection pump connector.
C. Measure the resistance from terminal 59 engine
speed/timing sensor at the ECM and to terminal
8 engine speed/timing sensor of the P40 fuel
injection pump connector.
D. The resistance should be less than 2 ohms.
Expected Result:
The readings agree with the values that are listed
above.
Results:
•
OK – The ECM does not operate properly.
Repair: Perform the following repairs on the
suspect ECM.
1. Temporarily install a test ECM.
Note: The test ECM should be programmed with the
g00863550
correct software. All parameters should be set to the
same value as the suspect ECM.
2. If the fault is eliminated with the test ECM,
reconnect the suspect ECM.
3. If the fault returns with the suspect ECM, then
the suspect ECM is faulty. Replace the suspect
ECM.
STOP.
•
Not OK – The readings are higher than 2 ohms.
Proceed to Test Step 6.
RENR2696-01
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