Click here to make tpub.com your Home Page

Page Title: Test Step 1. Inspect Electrical Connectors and Wiring
Back | Up | Next

Click here for thousands of PDF manuals

Google


Web
www.tpub.com

Home


   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Logistics
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
   
   

 

290
TM 9-2320-312-24-2
Troubleshooting Section
Test Step 1. Inspect Electrical Connectors
C. Monitor the status of the ignition key switch while
and Wiring.
the ignition key switch is being cycled slowly
from the ON position to the OFF position.
A. Thoroughly inspect ECM vehicle harness
Note: ET may indicate that a new ECM has been
connector J1/P1, the battery connections and
detected. This condition is normal, due to a
the connections to the ignition key switch. Refer
powerdown of the ECM with the ignition key switch
to Troubleshooting, "Electrical Connectors -
in the OFF position.
Inspect" for details.
Note: Cycling the ignition key switch several times
B. Perform a 45 N (10 lb) pull test on each of the
may cause additional 43-02 faults to be logged.
wires in the ECM connector that are associated
This is normal. Clear any logged faults.
with the following connections:
Unswitched +battery (terminals 52 and 53)
Expected Result:
-Battery (terminals 65 and 67)
The status of the ignition key switch changes from
"On" with the ignition key switch in the ON position
Ignition Key Switch (terminal 70)
to "Off" with the ignition key switch in the OFF
position.
C. Check the ECM connector (allen head screw) for
Results:
the proper torque of 6.0 Nm (55 lb in).
YES The input for the ignition key switch is
D. Check the harness and wiring for abrasion and
functioning properly at this time.
pinch points from the battery to the ECM, and
from the ignition key switch to the ECM.
Repair: If an intermittent connection is suspected,
refer to Troubleshooting, "Electrical Connectors
Expected Result:
- Inspect". Excessive cycling of the ignition key
switch can cause this fault to be logged. This is
All connectors, pins and sockets should be
normal. Clear any logged faults.
completely coupled and/or inserted and the harness
and wiring should be free of corrosion, abrasion
STOP.
or pinch points.
NO Proceed to Test Step 3.
Results:
Test Step 3. Check the Battery Voltage at
OK, Troubleshooting a 43-02 Code Proceed to
the ECM.
Test Step 2.
OK, Troubleshooting a 168-02 Code Proceed
Perform Steps A, B, and C if the following
to Test Step 3.
diagnostic code is active or logged:
Not OK There is a problem with the connectors
168-02 Intermittent Battery (51)
or wiring.
A. Disconnect vehicle harness connector P1 from
Repair: Repair the connectors or wiring and/or
ECM connector J1 and insert a breakout T.
replace the connectors or wiring. Ensure that all
of the seals are properly in place and ensure that
B. Measure the voltage between vehicle harness
the connectors are completely coupled.
connector P1 terminal 52 (unswitched +battery)
and terminal 65 (-battery).
STOP.
Test Step 2. Use ET to Check the Ignition
Key Switch.
A. Turn the ignition key switch to the OFF position.
B. Connect ET to the cab data link connector and
access the status screen that shows the status
of the ignition key switch.

Privacy Statement - Press Release - Copyright Information. - Contact Us

Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business