TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
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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