TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download
Page 444 of 1205
TM 9-2320-387-24-l TRANSMISSION SYSTEM DIAGNOSTIC FLOWCHART r& 1 TESTOPTIONS KNOWN INFO . CONNECT DIAGNOSTIC SWITCH CABLE TO THE TRANSMISSION CONTROL MODULE (TCM) J2 CONNECTOR. DISCONNECT GLOW PLUG CONTROLLER. TURN VEHICLE IGNITION TO THE RUN POSITION. DOES TRANSMISSION CHECK LAMP STEADILY ILLUMINATE? VISUAL 1 REASON FOR QUESTION Ttansmisssion check lamp may be faulty. NO LEAKS FLUID OK SHIFTER OK POSSIBLE PROBLEMS TRANSMISSION 1 TEST OPTIONS KNOWN INFO I MULTIMETER NO LEAKS FLUID OK SHIFTER OK CHECK VOLTAGE ON HARNESS LEADS TO TRANSMISSION CHECK LAMP. DID YOU GET: >12 V ON PIN 1 (CKT 657B)? 0 V ON PIN 2 (CKT 657A)? POSSIBLE PROBLEMS 1 REASON FOR QUESTION Transmission check lamp or harness leads may be faulty. TRANSh’!XION 0 YES t 83 1 TEST OPTIONS POSITION SWITCH TO ON. DOES THE TRANSMISSION CHECK LAMP FLASH THREE CODE 12s INDICATING THE TCM IS CAPABLE OF DIAGNOSTICS? SEE FLOWCHART AT RIGHT. KNOWN INFO NO LEAKS FLUID OK SHIFTER OK POSSIBLE PROBLEMS REASON FOR QUESTION Transmission check lamp must flash three code 12s indicating the TCM is capable at diagnostics. TRANSMISSION 2-392