Table 229
Troubleshooting Test Steps
Values Results
1. Inspect Electrical Connectors and Wiring
A. Turn the keyswitch to the OFF position.
B. Inspect the connectors for the speed/timing sensors. Refer
to Troubleshooting, “Electrical Connectors - Inspect”.
C. Perform a 45 N (10 lb) pull test on each of the wires in the
suspect sensor connector and the sensor connections at the
ECM.
D. Check the screw for the ECM connector for the correct tor-
que of 6 N·m (53 lb in).
E. Check the ground connection on the ECM for abrasions
and pinch points.
F. Check the harness for abrasion and pinch points from the
suspect sensor to the ECM.
G. Check that the suspect sensor is installed correctly. Check
that the suspect sensor is fully seated into the engine.
Loose connection or
damaged wire
Result: There is a fault in a connector or the wiring.
Repair: Repair any faulty connectors or replace the wir-
ing harness. Ensure that all of the seals are properly in
place and ensure that the connectors are correctly
coupled.
Use the electronic service tool to clear all logged diag-
nostic codes and verify that the repair eliminates the
fault.
Result: All connectors, pins, and sockets are correctly
coupled and/or inserted. The harness is free of corro-
sion, abrasion, and pinch points.
Proceed to Test Step 2.
2. Check For Active Diagnostic Codes
A. Turn the keyswitch to the OFF position.
B. Connect the electronic service tool to the diagnostic
connector.
C. Turn the keyswitch to the ON position. If the engine will
start, then run the engine.
D. Use the electronic service tool in order to monitor active di-
agnostic codes or recently logged diagnostic codes.
E. Turn the keyswitch to the OFF position.
Diagnostic codes Result: Diagnostic code 637-11 or 261-11 is active or re-
cently logged.
Proceed to Test Step 3.
Result: Diagnostic code 190-8, 723-8, or 342-8 is active
or recently logged.
Proceed to Test Step 5.
Result: Diagnostic code 3512-3, 3483-3, 3512-4 or
3483-4 is active or recently logged.
Proceed to Test Step 9.
3. Inspect the Sensors
A. Ensure that the speed/timing sensors are correctly seated
in the cylinder block and that the retaining bolts are tightened
to a torque of 22 N·m (16 lb ft). Ensure that the speed/timing
sensors are not damaged.
Replace any damaged sensors. Refer to Disassembly and As-
sembly, “Crankshaft Position Sensor - Remove and Install” or
refer to Disassembly and Assembly, “Camshaft Position Sen-
sor - Remove and Install”.
B. Turn the keyswitch to the ON position. If the engine will run,
then run the engine.
C. Use the electronic service tool to check if the 637-11 or
261-11 diagnostic code is still active.
Faulty sensor Result: A 637-11 or 261-11 diagnostic code is no longer
active.
Use the electronic service tool to clear all logged diag-
nostic codes. Return the engine to service.
Result: A 637-11 or 261-11 diagnostic code is still
active.
Proceed to Test Step 4.
(continued)
UENR4469-36 435
Circuit Tests
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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