(Table 229, contd)
Troubleshooting Test Steps
Values Results
4. Check the Crankshaft Timing Ring and the Timing Ring
on the Camshaft
A. Remove the primary speed/timing sensor and the secon-
dary speed/timing sensor. Refer to Disassembly and Assem-
bly, “Crankshaft Position Sensor - Remove and Install” or refer
to Disassembly and Assembly, “Camshaft Position Sensor -
Remove and Install”.
B. Use a flashlight in order to check the timing ring on the
camshaft through the camshaft timing hole for damage.
C. Use a flashlight in order to check the crankshaft timing ring
for damaged teeth or missing teeth. Ensure that the crankshaft
timing ring has not been displaced from the crankshaft.
Loose timing ring or
damaged teeth
Result: Fault identified with the crankshaft timing ring or
the timing ring on the camshaft.
Repair: If necessary, replace the camshaft. Refer to Dis-
assembly and Assembly, “Camshaft - Remove” and refer
to Disassembly and Assembly, “Camshaft - Install”.
If necessary, replace the crankshaft timing ring. Refer to
Disassembly and Assembly, “Crankshaft Timing Ring -
Remove and Install”.
Use the electronic service tool in order to clear all logged
diagnostic codes and then verify that the repair has elim-
inated the fault.
Result: No faults found.
Repeat this procedure from Test Step 3.
5. Measure the Supply Voltage at the Sensor Connector
A. Turn the keyswitch to the OFF position.
B. Disconnect the speed/timing sensor with the active diag-
nostic code.
C. Turn the keyswitch to the ON position.
D. Measure the voltage from terminal 1 on the sensor connec-
tor to engine ground.
7.5 VDC to 8.5 VDC Result: The sensor supply voltage is not within the ex-
pected range - The fault is in the sensor supply wiring
between the sensor and the ECM.
Repair: Repair the faulty wiring or replace the faulty
wiring.
Use the electronic service tool to clear all logged diag-
nostic codes and verify that the repair eliminates the
fault.
Result: The sensor supply voltage is correct.
Proceed to Test Step 6.
(continued)
436 UENR4469-36
Circuit Tests
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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