158 KENR9126
Troubleshooting Section
Results:
•
OK – The harness does not have an open circuit.
Proceed to Test Step 6.
•
Not OK – The harness has an open circuit.
Repair: Repa
ir the faulty connectors or the harness
and/or replace the faulty connectors or the harness.
Reconnect all sensor and ECM connectors. Ensure
that all of t
he seals are correctly in place. Ensure
that all connectors are correctly coupled.
Use the elec
tronic service tool in order to clear all
logged diagnostic codes and then verify that the
repair eliminates the fault.
STOP.
Test Step 5
. Check that the Connections
and the Wi
ring to the Secondary
Speed/T
iming Sensor and the ECM are
Isolate
d from Other Power Sources
A. Turn the keyswitch to the OFF position.
B. Disconnect the P2 connector. Disconnect the
connector for the primary speed/timing sensor.
Discon
nect the connector for the secondary
speed/timing sensor.
C. Measu
re the resistance from P2:53 to all other
pins on the P2 connector. Measure the resistance
from P2:53 to the ground and battery+ terminals.
The re
sistance should be more than 20,000 Ohms.
D. Measure the resistance from P2:10 to all other
pins
on the P2 connector. Measure the resistance
from P2:10 to the ground and the battery+
terminals. The resistance should be more than
20,0
00 Ohms.
Expected Result:
The readings agree with the values that are listed
above.
Results:
•
OK
– There is no short circuit. Proceed to Test
Step 7.
•
No
t OK – The harness has a short circuit.
Repair: Repair the faulty connectors or replace
t
he faulty connectors. Repair the faulty harness or
replace the faulty harness. Reconnect all sensor
and ECM connectors. Ensure that all of the seals
a
re correctly in place. Ensure that all connectors
are correctly coupled.
Use the electronic service tool in order to clear all
logged diagnos
tic codes and then verify that the
repair eliminates the fault.
STOP.
Test Step 6. Check that the Connections
and the Wiring to the Primary
Speed/Timing Sensor and t he ECM
are Isolated from the Other Power
Sources
A. Turn the keyswitch to the OFF position.
B. Disconnect the P2 connector. Disconnect the
connector from the primary speed/timing sensor.
Disconne
ct the connector from the secondary
speed /timing sensor.
C. Check the
resistance between P2:52 and each
of the other pins on the P2 connector. Check the
resistance between P2:52 and the ground and
battery
+ terminals. The resistance should be more
than 20,000 Ohms.
D. Check t
he resistance between P2:10 and each
of the other pins on the P2 connector. Check the
resistance between P2:10 and the ground and
batter
y+ terminals. The resistance should be more
than 20,000 Ohms.
Expec
ted Result:
The readings agree with the values that are listed
above
.
Results:
•
OK – The wires are not a short circuit. Proceed
to Test Step 7.
•
Not OK – The sensor wiring has a short circuit.
Rep
air: Repair the faulty connectors or replace
the faulty connectors. Repair the faulty harness or
replace the faulty harness. Reconnect all sensor
and
ECM connectors. Ensure that all of the seals
are correctly in place. Ensure that all connectors
are correctly coupled.
Use the electronic service tool in order to clear all
logged diagnostic codes and then verify that the
re
pair eliminates the fault.
STOP.
Test Step 7. Check if a Replacement
Sensor Eliminates the F ault
A. Turn the keyswitch to the OFF position.
B. Disconnect the suspect sensor and remove the
suspect sensor from the engine.
To Next Page
