(Table 148, contd)
Troubleshooting Test Steps
Values Results
3. Measure the Voltage to the Aftertreatment Identification
Module
A. Turn the keyswitch to the OFF position.
B. Disconnect the aftertreatment identification module from the
harness.
C. Turn the keyswitch to the ON position.
D. Measure the voltage at the harness connector for the aftertreat-
ment identification module from terminal 1 to terminal 6.
4.84 to 5.16
VDC.
Result: The supply voltage is out of the nominal range.
Repair: Replace the harness.
Use the electronic service tool to verify that the repair
eliminates the fault.
Result: The supply voltage is correct.
Proceed to Test Step 4.
4. Check the Signal Wire for an Open Circuit
A. Turn the keyswitch to the OFF position.
B. Disconnect the connector for the aftertreatment ID module. Dis-
connect the P1 connector on the engine ECM.
C. Check the resistance between pin 70 on the P1 connector and
terminal 3 on the harness connector for the aftertreatment identifica-
tion module.
Less than 2
Ohms
Result: The measured resistance is more than 2 Ohms.
Repair: Replace the harness.
Use the electronic service tool to verify that the repair
eliminates the fault.
Result: The measured resistance is less than 2 Ohms
Proceed to Test Step 5.
(continued)
270 UENR4469-36
Circuit Tests
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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