TM 9-2320-280-34
Table 2-1. Mechanical Troubleshooting (Cont' )
d
MALFUNCTION
TEST OR INSPECTION
ELECTRIC CHECK-OUT OF ELECTRONIC COMPONENTS IN 4L80-E TRANSMISSION AT
TRANSMISSION ELECTRICAL CONNECTOR.
SHIFT SOLENOID A (1-2)
With the transmission electrical connector disconnected, measure the
resistance between pins A and E. Resistance should be between 18 to 24 ohms.
LOW
HIGH
Check for:
- High resistance of solenoid; replace.
- Bad connections and/or wires to the solenoid; repair or replace.
Check for:
- Low resistance of solenoid; replace.
- Shorts in wires or connectors; repair or replace.
SHIFT SOLENOID B (2-3)
With the transmission electrical connector disconnected, measure the
resistance from pin B to pin E. Resistance should be between 18 to 24 ohms.
LOW
HIGH
Check for:
- High resistance of solenoid; replace.
- Bad connections and/or wires to the solenoid; repair or replace.
Check for:
- Low resistance of solenoid; replace.
- Shorts in wires or connectors; repair or replace.
FORCE MOTOR (PRESSURE CONTROL SOLENOID)
With the transmission electrical connector disconnected, measure the resistance
between pins C and D. Resistance should be between 3.5 to 5.0 ohms.
LOW
HIGH
Check for:
- High resistance of solenoid; replace.
- Wires and connectors for bad connections and or breaks; repair or replace.
Check for:
- Low resistance of solenoid; replace.
- Short in wires or connectors; repair or replace.
2-12.1
