TM 5-3805-298-23-1
0054
Table 1. 190 Engine Speed Sensor Diagnostic Codes.
0054
CID FMI CODE
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE
190-8 Engine Speed Sensor
Signal Is an Abnormal
Always inspect wiring harness connectors that are involved in the circuit.
Frequency, Pulse Width, or
Poor connections can often be the cause of a problem in an electrical
Time Period
circuit. Verify that all connections in the circuit are clean and secure and
that all connections are in good condition. If a problem with the
connection is found, correct the problem and verify that this malfunction
or diagnostic code is active before performing this procedure.
Perform open or short-circuit test at each wiring harness connection to
identify the correct wiring harness to replace.
Tag all wiring harnesses to aid in installation.
Perform this test only if condition is active.
DIAGNOSTIC CODE SET CONDITION
Engine ECM detects an intermittent loss of signal or a complete loss of signal
from the primary speed/timing sensor for 2 seconds.
POSSIBLE CAUSE
Engine control wiring harness is open.
Primary engine speed (crank position) sensor is faulty.
Engine ECM.
Test Step 1. Check for Active
Diagnostic Codes.
1. Connect MSD and select C6.6 924
2. Start engine (TM 5-3805-298-10).
Diagnostic Code 190-8 Active -
Using MSD, check for active
Proceed to Test Step 2.
diagnostic codes (WP 0008).
Diagnostic Code 190-8 Not Active -
Troubleshooting is complete.
Test Step 2. Test for Open Engine
Control Wiring Harness.
1. Turn ignition switch and battery
disconnect switch to OFF position
(TM 5-3805-298-10).
2. Remove right engine access panel
(WP 0348).
