KENR6933 141
Troubleshooting Section
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Illustration 49
Schematic for engine temperature sensors
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Illustrat
ion 50
Engine coolant temperature sensor and intake manifold air
temperature s ensor
(1) Signal (SIG)
(2) Ground (GND)
Test Step 1
. Verify All Active Diagnostic
Codes
A. Connect the electronic service tool to the data link
connector
.
B. Turn the keyswitch to the ON position.
Note: Wait at least 30 seconds for 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 recent
ly logged:
•
0110-03 Engine Coolant Temperature Sensor
voltage a
bove normal
•
0110-04 Engine Coolant Temperature Sensor
voltage b
elow normal
•
0172-03 Intake Manifold Air Temperature
Sensor vo
ltage above normal
•
0172-04 Intake Manifold Air Temperature
Sensor 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 – The fault is intermittent. Proceed to Test Step
8.