TM 5-3805-291-23-1
ELECTRICAL SYSTEM TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
0013 00
ENGINE TEMPERATURE SENSOR OPEN OR SHORT CIRCUIT TEST - CONTINUED
2.
Check for active diagnostic codes.
a.
Connect ET to diagnostic connector (WP 0005 00).
b.
Place battery disconnect switch in ON position (TM 5-3805-291-10).
c.
Monitor Active Diagnostic Code screen on ET. Check and record any active diagnostic codes.
N OT E
Wait at least 30 seconds for diagnostic codes to become active.
d.
Look for an 03 diagnostic code or 04 diagnostic code.
Expected Results. No diagnostic codes are active.
e.
(1)
If results are OK, no diagnostic codes are active. Problem appears to be resolved. Problem may have been
related to a faulty connection in harness. Carefully reinspect connectors and wiring. Refer to Electrical
Connector Inspection (WP 0022 00).
(2)
If results are not OK, an 04 diagnostic code is active at this time. Proceed to step 3.
(3)
If results are not OK, an 03 diagnostic code is active at this time. Proceed to step 4.
3.
Disconnect suspect sensor in order to create an open circuit.
a.
Place battery disconnect switch in OFF position (TM 5-3805-291-10).
b.
Disconnect suspect sensor from engine harness.
c.
Place battery disconnect switch in ON position (TM 5-3805-291-10).
d.
Access Active Diagnostic Codes screen on ET and check for an active 03 diagnostic code for suspect sensor.
N OT E
Wait at least 30 seconds for diagnostic codes to become active.
e.
Place battery disconnect switch in OFF position (TM 5-3805-291-10).
Expected Results. An 03 diagnostic code is now active for suspect sensor.
f.
(1)
If results are OK, an 04 diagnostic code was active before disconnecting sensor. An 03 diagnostic code
became active after sensor was disconnected. There may be a problem with sensor. Install new sensor (WP
0077 00, WP 0082 00, and WP 0084 00). Clear any logged diagnostic codes.
(2)
If results are not OK, an 04 diagnostic code is still present. Leave sensor disconnected. Proceed to step 5.
4.
Create a short at sensor connector.
a.
Place battery disconnect switch in OFF position (TM 5-3805-291-10).
b.
Disconnect suspect sensor at sensor connector.
c.
Fabricate a jumper wire that can be used to create a short between terminal 1 (signal) and terminal 2 (sensor return)
at suspect sensor's connector. Crimp connector pins to each end of jumper wire.
d.
Install jumper into harness side of sensor connector.
e.
Place battery disconnect switch in ON position (TM 5-3805-291-10).
f.
Access Active Diagnostic Code screen on ET. Check for an active 04 diagnostic code for suspect sensor.
0013 00-44
