Table 159
Troubleshooting Test Steps
Values Results
1. Inspect Electrical Connectors and Wiring
A. Turn the keyswitch to the OFF position.
B. Inspect the connectors in the circuit for the data link.
Refer to Troubleshooting, “Electrical Connectors - Inspect” for
details.
C. Perform a 45 N (10 lb) pull test on each of the wires that are as-
sociated with the data link.
D. Check the screw for the P1 and P2 ECM connectors for correct
torque of 6 N·m (53 lb in).
E. Check all of the wiring associated with the data link for abra-
sions and pinch points.
Damaged
wire or
connector
Result: A damaged wire or damaged connector was found.
Repair: Repair the damaged wire or the damaged
connector.
Use the electronic service tool to clear all logged diagnostic
codes. Verify that the repair eliminates the fault.
Result: A damaged wire or damaged connector was not
found.
Proceed to Test Step 2.
2. Determine the Type of Fault in the Data Link
A. Connect the electronic service tool to the diagnostic connector
that is on the engine harness or on the application.
B. Turn the keyswitch to the ON position.
Power to the
comms
adapter
Result: The power lamp illuminates on the communications
adapter. The communications adapter is currently receiving
the correct voltage.
Proceed to Test Step 5.
Result: The power lamp is not illuminated on the communi-
cations adapter. The communications adapter is not cur-
rently receiving the correct voltage.
Proceed to Test Step 3.
3. Check the Battery Voltage at the Diagnostic Connector
A. Turn the keyswitch to the ON position.
B. Use a multimeter in order to measure the voltage from pin A
(battery+) and pin B (ground) of the diagnostic connector.
11.0 VDC
and 13.5
VDC for a 12
VDC system.
22.0 VDC
and 27.0
VDC for a 24
VDC system.
Result: The voltage is between 22.0 VDC and 27.0 VDC for
a 24 V system. The voltage is between 11.0 VDC and 13.5
VDC for a 12 V system. The diagnostic connector is cur-
rently receiving the correct voltage.
Proceed to Test Step 5.
Result: The voltage is not between 22.0 VDC and 27.0 VDC
for a 24 V system. The voltage is not between 11.0 VDC and
13.5 VDC for a 12 V system. The diagnostic connector is not
currently receiving the correct voltage.
Proceed to Test Step 4.
UENR4469-36 287
Circuit Tests
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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