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A/T CONTROL SYSTEM TM-15 < FUNCTION DIAGNOSIS > [TYPE 1 (4AT: RE4F03B)] C E F G H I J K L M A B TM N O P • *1: Operates when OD OFF. (OD OFF indicator lamp is on.) • *2: Oil pressure is applied to both 2nd “apply” side and 3rd “release” side of band servo piston. However, brake band does not contract because oil pressure area on the “release” side is greater than that on the “apply” side. • *3: Oil pressure is applied to 4th “apply” side on condition *2 above, and brake band contracts. • *4: A/T will not shift to 4th when OD OFF. (OD OFF indicator lamp is on.) • : Operates. • A: Operates when throttle opening is less than specification**, activating engine brake. • B: Operates during “progressive” acceleration. • C: Operates but does not affect power transmission. • D: Operates when throttle opening is less than specification**, but does not affect engine brake. - **: Overrun clutch remains in engaged condition when throttle opening is less than 1/16. POWER TRANSMISSION “N” and “P” Positions • “N” position Power from the input shaft is not transmitted to the output shaft because the clutches do not operate. • “P” position N NEUTRAL POSITION D*4 1st *1D B B 2nd *1A B Automatic shift 3rd *1A *2C C B *1 1 ⇔ 2 ⇔ 3 ⇔ 4 4th C *3C C 2 1st B B Automatic shift 1 ⇔ 2 ⇐ 3 2nd B 3rd *2C C B 1 1st B B Locks (held stationary) in 1st speed 1 ⇐ 2 ⇐ 3 2nd B 3rd *2C C B Shift posi- tion R/C 5 H/C 6 F/C 15 O/C 17 Band servo F/O.C 16 L/O.C 18 L&R/B 19 Lock- up Remarks 2nd apply 3rd re- lease 4th ap- ply |