Table 1. 672 Torque Converter Output Speed Sensor Diagnostic Codes.
CID FMI CODE
TEST OR INSPECTION
Output Speed Sensor Data
· Always inspect wiring harness connectors that are involved in the circuit.
Is Erratic, Intermittent, or
Poor connections can often be the cause of a problem in an electrical
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
Transmission ECM detects transmission input speed sensor signal frequency or
the signal pulse width is not within the expected range.
· Transmission input speed sensor is faulty.
· Lower cab wiring harness is open.
· Lower cab wiring harness is shorted.
· Transmission wiring harness is open.
· Transmission wiring harness is shorted.
· Transmission ECM.
Test Step 1. Check for Active
Connect MSD. Select Transmission
Diagnostic Code 672-2 Active -
924H and check for active diagnostic
Proceed to Test Step 2.
Diagnostic Code 672-2 Not Active -
Troubleshooting is complete.
Test Step 2. Test for Faulty
Transmission Input Speed Sensor.
1. Turn ignition switch and battery
disconnect switch to OFF position