KENR9126 157
Troubleshooting Section
•
Lubricate the “O” ring with clean engine
lubricating oi
l.
•
Ensure that the plug for the sensor has a seal
inside the con
nector body. If a seal is damaged
or missing, replace the seal.
•
Ensure that t
he sensor is fully seated into the
engine before tightening the bracket bolt.
•
Ensure that
the connector is latched.
•
Ensure that the harness is correctly secured,
and ensure t
hat the harness is attached to the
harness clip.
Use the ele
ctronic service tool in order to clear all
logged diagnostic codes and then verify that the
repair has eliminated the fault.
STOP.
Test Step
2. Check for Active Diagnostic
Codes an
d Recently Logged 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 diagnostic codes or recently logged
diagn
ostic codes.
Expected Result:
One or more of the following diagnostic codes are
active or recently logged:
•
190-8 Engine Speed Sensor abnormal frequency,
pulse width, or period
•
342-8 Secondary Engine Speed Sensor abnormal
frequency, pulse width, or period
Results:
•
19
0-8 – Proceed to Test Step 4.
•
342-8 – Proceed to Test Step 3.
•
Not OK – No active diagnostic codes or recently
logged diagnostic codes are displayed. STOP.
Test Step 3. Check the H arness Between
the Secondary Speed/Timing Sensor and
the ECM
A. Turn the keyswitch to the OFF position.
B. Disconnect the P2 connector. Disconnect the
connector for t
he primary speed/timing sensor.
Disconnect the connector for the secondary
speed /timing sensor.
C. Check the resistance between P2:53 and terminal
2 on the secondary speed/timing sensor. The
resistance s
hould be less than 2.0 Ohms.
D. Check the resistance between P2:10 and terminal
1 on the seco
ndary speed/timing sensor. The
resistance should be less than 2.0 Ohms.
Expected Re
sult:
The readings agree with the values that are listed
above.
Results:
•
OK – The harness does not have an open circuit.
ProceedtoTestStep5.
•
Not OK – The harness or the connector has an
open circuit or high resistance.
Repair: Repair the faulty connectors or the
harness. Replace the faulty connectors or
the harn
ess. Reconnect all sensor and ECM
connectors. Ensure that all of the seals are
correctly in place. Ensure that all connectors are
correct
ly coupled.
Use the electronic service tool in order to clear all
logged
diagnostic codes and then verify that the
repair has eliminated the fault.
STOP.
Test Step 4. Check the Harness Between
the Primary Speed/Timing Sensor and
the ECM
A. Turn the keyswitch to the OFF position.
B. Dis
connect the P2 connector. Disconnect the
connector for the primary speed/timing sensor.
Disconnect the connector for the secondary
spe
ed/timing sensor.
C. Check the resistance between P2:52 and terminal
2o
n the secondary speed/timing sensor. The
resistance should be less than 2.0 Ohms.
D. Ch
eck the resistance between P2:10 and terminal
1 on the secondary speed/timing sensor. The
resistance should be less than 2.0 Ohms.
Expected Result:
T
he readings agree with the values that are listed
above.
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