TM 1-2840-252-23-3
G-15 FAULT CODE F1, N1A SENSOR EXPANDED INSTRUCTIONS
Refer to numbered steps in figure 101.
Step 3.
Check harness connector PL1 (figure 201) at DECU, and P4 at HMA for tight connections.
Step 4.
Disconnect connectors PL1 and P4 to check pins and sockets.
Step 6.
With PL1 disconnected, check resistance of HMA (N1A sensor) at harness PL1 connector
sockets MM and FF (figure 202). Limit is 200-550Q.
Step 7.
With P4 disconnected, check resistance of HMA (N1A sensor) at HMA J4 connector pins R and
S. Limit is 200-550Q.
Step 8.
Refer to manufacturer's procedure for checking drive pad and spline.
Step 9.
Before tightening harness connectors PL1 and P4, be sure that keyways in harness connec-
tors are aligned with keyways in component connectors.
Step 13. Refer to manufacturer's procedure for checking drive pad and spline.
Step 15. Refer to manufacturer's procedure for checking drive pad and spline.
Step 18. Refer to manufacturer's procedure for diagnosing and replacing harness.
Step 21. Refer to manufacturer's procedure for checking drive pad and spline
Step 23. Refer to manufacturer's procedure for diagnosing and replacing harness.
RESISTANCE-CHECK SUMMARY
Resistance (Ω)
Connector
Component
No.
Contacts
Limits
Nominal*
HMA - N1A Sensor
PL1
MM & FF
200-550
390
*At 25
C
J4
R&S
200-550
390
G-14
