Perkins 1106D Troubleshooting Manual page 156

156
Troubleshooting Section
•
190-08 Engine Speed signal abnormal
•
342-08 Secondary Engine Speed signal abnormal
Results:
•
190-08 – Proceed to Test Step 4.
•
342-08 – Proceed to Test Step 3.
•
Not OK – No active diagnostic codes or recently
logged diagnostic codes are displayed. STOP.
Test Step 3. Check the Harness 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 the primary speed/timing sensor.
Disconnect the connector for the secondary
speed/timing sensor.
C. Check the resistance between P2:53 to the
secondary speed/timing sensor terminal 2. The
resistance should be less than 2.0 Ohms.
D. Check the resistance between P2:10 to the
secondary speed/timing sensor terminal 1. The
resistance should be less than 2.0 Ohms.
Expected Result:
The readings agree with the values that are listed
above.
Results:
•
OK – The harness is not OPEN circuit. Proceed
to Test Step 5.
•
Not OK – The harness or the connector is an open
circuit or high resistance.
Repair: Repair the faulty connectors or the
harness. Replace the faulty connectors or
the harness. Reconnect all sensor and ECM
connectors. Ensure that all of the seals are
correctly in place. Ensure that all connectors are
correctly coupled.
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. Disconnect the P2 connector. Disconnect the
connector for the primary speed/timing sensor.
Disconnect the connector for the secondary
speed/timing sensor.
C. Check the resistance between P2:52 to the
secondary speed/timing sensor terminal 2. The
resistance should be less than 2.0 Ohms.
D. Check the resistance between P2:10 to the
secondary speed/timing sensor terminal 1. The
resistance should be less than 2.0 Ohms.
Expected Result:
The readings agree with the values that are listed
above.
Results:
•
OK – The harness is not OPEN circuit. Proceed
to Test Step 6.
•
Not OK – The harness is OPEN circuit.
Repair: Repair 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 the seals are correctly in place. Ensure
that all connectors are correctly coupled.
Verify that the repair eliminates the fault.
STOP.
Test Step 5. Check that the Connections
and the Wiring to the Secondary
Speed/Timing Sensor and the ECM are
Isolated 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.
Disconnect the connector for the secondary
speed/timing sensor.
C. Measure the resistance from P2:53 secondary
speed/timing sensor signal input to all other pins
on the P2. Measure the resistance from P2:53
secondary speed/timing sensor signal input to the
ground and battery+ terminals. The resistance
should be more than 20,000 Ohms.
D. Measure the resistance from P2:10 speed/timing
sensor (+8 V supply) to all other pins on the P2.
Measure the resistance from P2:10 speed/timing
sensor (+8 V supply) to the ground and the
battery+ terminals. The resistance should be more
than 20,000 Ohms.
SENR9982