TM 5-3805-291-23-1
HOW TO USE ON-BOARD DIAGNOSTICS - CONTINUED
0006 00
FAILURE MODE IDENTIFIERS (FMIs)
0006 00
427-C2036
Table 1. Detailed FMI Explanation.
FMI
DESCRIPTION
EXPLANATION
00
Data Valid but Above
Every electronic control system sets a high limit for expected signal operating range.
Normal Operating
High limit includes over range signals. This could be a high temperature. A sensor that
Range (may need
is still operating but sending a signal above expected limit will cause an FMI 00 to be
stored. Some possible causes of an FMI 00 diagnostic code are:
Signal is above normal.
Signal is shorted to +batt.
Sensor needs to be calibrated sothat a PWM signal at a duty cycle
of 80 percent is a valid signal. If PWM signal has a duty cycle of 81
percent, sensor is still working, but sensor signal is above expected
signal limits.
Every electronic control system sets a low limit for expected signal operating range.
01
Data Valid but Below
Low limit includes signals under lower limit. Low signal could be oil pressure signal.
Normal Operating
Sensor is still working, but sending a signal below expected limit will cause an FMI
Range (may need
01 to be stored. Some possible causes of an FMI 01 diagnostic code are:
Timing is retarded.
Signal is below normal range so that a PWM sensor is not expected
to generate a PWM signal below a duty cycle of 5 percent with zero
air pressure. If sensor generates a signal with a duty cycle of 4 per-
cent when engine is shut down, sensor is still working but sending a
signal below expected limit, which will cause an FMI 01 to be
stored.
0006 00-6
