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Page Title:
Electrical Connections of the Lamp |
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 168
TM 9-2320-312-24-2
Troubleshooting Section
Test Step 1. Inspect Electrical Connectors
Output 1 can operate as a change oil lamp or as
and Wiring.
a PTO Switch ON Lamp. The parameter "Change
Oil Lamp" must be programmed to "J1/P1:30" to
use output 1 as a change oil lamp. The change oil
lamp illuminates when the engine oil needs to be
changed.
The following parameters determine when the ECM
will illuminate the change oil lamp.
"Maintenance Indicator Mode"
"PM1 Interval"
"PM1 Engine Oil Capacity"
If "Maintenance Indicator Mode" is programmed
to "Manual - Distance" or "Manual - Hours", the
parameter "PM1 Interval" must be programmed.
If "Maintenance Indicator Mode" is programmed
to "Automatic - Distance" or "Automaitc - Hours",
the parameter "PM1 Engine Oil Capacity" must be
programmed.
Electrical Connections of the Lamp
One terminal of the lamp must be connected to
battery voltage through the vehicle wiring. The other
terminal is connected to the ECM at the vehicle
harness connector J1/P1 at terminal 30.
The ECM provides a path to ground that will turn
on the lamp.
g00836088
Illustration 42
P1 connector
A. Thoroughly inspect ECM vehicle harness
connector J1/P1, the firewall bulkhead connector,
and the terminals for the change oil lamp.
Refer to Troubleshooting, "Electrical Connectors
- Inspect" for details.
B. Perform a 45 N (10 lb) pull test on each of the
g00836031
wires in the ECM connector that are associated
Illustration 41
with the change oil lamp.
Circuit schematic for the change oil lamp
C. Check the ECM connector (allen head screw) for
the proper torque of 6.0 Nm (55 lb in).
D. Check the harness and wiring for abrasion and
for pinch points from the sensor to the ECM.
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