TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
Page 541 of 890
DIAGNOSTIC FLOWCHART TRANSMISSION SYSTEM (4L80-E) TM 9-2320-280-20-1 Change 1 2-437 TRANSMISSION OUTPUT SPEED SENSOR (TOSS) CIRCUIT NOTE If reading from J1 diagnostics chart is greater than 2, perform high resistance - less than 1 perform low resistance. Disconnect and check continuity of wire 495A on J1 pin S to transmission output speed connector pin A, and check continuity of wire 498A on J1 pin R to transmission output speed connector pin B. Check continuity of transmission output speed sensor and pins A and B (TOSS) 1 Kohm to 2 Kohms Ω. Repair pin(s) or connector, (para. 4-85) Replace TOSS, (para. 4-46). Repair wire 497A, and/or wire 498A, (para. 4-85). Repair wire 497A/498A, (para. 4-85). Replace TOSS, (para. 4-46). Check transmission output speed sensor connector and pins for continuity. Disconnect TOSS and check continuity between pins M and N at J1. NO NO YES YES END END NO NO 497A 498A HIGH RESISTANCE LOW RESISTANCE YES