TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
Page 532 of 890
TRANSMISSION SYSTEM DIAGNOSTIC FLOWCHART (4L80-E) TM 9-2320-280-20-1 2-428 Change 1 NOTE • The following diagnostics will help isolate and repair problem circuits, wires, pins, connectors, sensors, circuit breakers, and solenoids. • For repair of all wiring, refer to para. 4-85. • Check connector pins before inserting probes. No No No No No Go to pg 2-431 Go to pg 2-430 Go to pg 2-432 Go to pg 2-433 Go to pg 2-433 Go to pg 2-434 J1 Voltage Measurements With Ignition ON, Engine OFF, and Glow Plug Controller Disconnected. Refer to para 4-29. CKT NOM. CKT # PIN TO PIN EXP READ IGN PWR 291D j a or b 12VDC Battery Pos 537D Z a or b 12VDC Trans Lp 657A U* a or b LED Lights Brake Sw 810B W a or b 12V (Brake OFF) Brake Sw 810B W a or b O (Brake ON) * Jumper wire from U to a or b. Reconnect Glow Plug Controller; refer to para 4-29. J1 Voltage Measurement With Ignition ON, Engine ON, and Transmission in PARK. CKT NOM. CKT # PIN TO PIN EXP READ Engine RPM 349A h c or p 0.3 Volts min @ idle Press SW A 765A A a or b Open wire Press SW B 763A B a or b 0 to 1 ohms Press SW C 764A C a or b Open wire J1 CABLE DIAGNOSTICS CHART No No No Go to pg 2-442 Go to pg 2-442 Go to pg 2-442