Perkins 1106D Troubleshooting Manual page 137

KENR6201-01
Illustration 46
Engine coolant temperature sensor and intake manifold air
temperature sensor
(1) Signal (SIG)
(2) Ground (GND)
Test Step 1. Verify All Active Diagnostic
Codes
A. Connect the electronic service tool to the
diagnostic connector.
B. Turn the keyswitch to the ON position.
Note: Wait at least 30 seconds in order to allow
activation of the diagnostic codes.
C. Use the electronic service tool in order to verify if
any of the following diagnostic codes are active
or recently logged:
• 110-3 Engine Coolant Temperature voltage
above normal
•
110-4 Engine Coolant Temperature voltage
below normal
•
172-3 Intake Manifold Air Temperature voltage
above normal
•
172-4 Intake Manifold Air Temperature voltage
below normal
Expected Result:
One or more of the preceding diagnostic codes are
active or recently logged.
Results:
•
Yes – Proceed to Test Step 2.
•
No – STOP.
This document is printed from SPI². Not for RESALE
Test Step 2. Inspect Electrical Connectors
And Wiring
A. Thoroughly inspect ECM engine harness
connector P2 and the suspect sensor connector.
Refer to Troubleshooting, "Electrical Connectors
- Inspect".
B. Perform a 45 N (10 lb) pull test on each of the
wires in the sensor connector and the ECM
connector that are associated with the active
diagnostic code.
Refer to illustration 45.
g01170313
C. Verify that the latch tab of the connector is
correctly latched. Also verify that the latch tab of
the connector has returned to the fully latching
position.
D. Check the screw for the ECM connector for the
correct torque of 5.0 N·m (44 lb in).
E. Check the harness for abrasions and for pinch
points from the sensor to the ECM.
F. Use the electronic service tool to perform a
"Wiggle Test". The "Wiggle Test" will identify
intermittent connections.
Expected Result:
All connectors, pins, and sockets should be
completely coupled and/or inserted. The harness
should be free of corrosion, abrasion, and pinch
points.
Results:
•
OK – Proceed to Test Step 3.
•
Not OK – Repair the connectors or the harness
and/or replace the connectors or the harness.
Ensure that all of the seals are correctly in place
and ensure that the connectors are completely
coupled. Clear all inactive diagnostic codes. Verify
that the repair has eliminated the fault. Proceed to
Test Step 3 if the fault has not been eliminated.
Test Step 3. Verify That The Diagnostic
Code Is Still Active
A. Turn the keyswitch to the ON position.
Note: Wait at least 30 seconds in order to allow
activation of the diagnostic codes.
B. Access the "Active Diagnostic Code" screen on
the electronic service tool and check for active
diagnostic codes.
C. Determine if the fault is related to an open circuit
diagnostic code or a short circuit diagnostic code.
137
Troubleshooting Section