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INSPECTION

INSPECTION

Symptom Problem parts
Starter does not rotate when select lever is in “P” or “N” range, starter rotates when select lever is in “R”, “D”, “3” or “2” range.


• Inhibitor switch

• Select cable

• Select lever

• Starter motor and harness


Abnormal noise when select lever is in “P” or “N” range.


• Strainer

• Transfer duty solenoid

• Oil pump

• Drive plate

• ATF level too high or too low


Hissing noise occurs during standing start.


• Strainer

• ATF level too high or too low


Noise occurs while driving in “D1”.


• Final gear

• Planetary gear

• Reduction gear

• Differential gear oil level too high or too low


Noise occurs while driving in “D2”.

Noise occurs while driving in “D3”.


• Final gear

• Low & reverse brake

• Reduction gear

• Differential gear oil level too high or too low


Noise occurs while driving in “D4”.


• Final gear

• Low & reverse brake

• Planetary gear

• Reduction gear

• Differential gear oil level too high or too low


Engine stalls while shifting from “1” range to another.


• Control valve

• Lock-up damper

• Engine performance

• Input shaft


Vehicle moves when select lever is in “N” range.


• Select cable

• Inhibitor switch

• TCM

• Low clutch


Shock occurs when select lever is moved from “N” to “D” range.


• Accelerator pedal position sensor

• ATF temperature sensor

• Line pressure linear solenoid

• Low clutch duty solenoid

• Low clutch

• TCM

• Harness

• Control valve

• ATF deterioration


Excessive time lag occurs when select lever is moved from “N” to “D” range.


• Control valve

• Low clutch

• Line pressure linear solenoid

• Seal ring

• Front gasket of transmission case


Shock occurs when select lever is moved from “N” to “R” range.


• Accelerator pedal position sensor

• ATF temperature sensor

• Line pressure linear solenoid

• TCM

• Harness

• Control valve

• ATF deterioration


Excessive time lag occurs when select lever is moved from “N” to “R” range.


• Control valve

• Low & reverse clutch

• Reverse clutch

• Line pressure linear solenoid

• Seal ring

• Front gasket of transmission case


Vehicle does not start in any shift range (engine stalls).


• Parking brake mechanism

• Planetary gear


Vehicle does not start in any shift range (engine revving up).


• Strainer

• Line pressure linear solenoid

• Control valve

• Drive pinion

• Hypoid gear

• Axle shaft

• Differential gear

• Oil pump

• Input shaft

• Output shaft

• Planetary gear

• Drive plate

• ATF level too low

• Front gasket of transmission case


Vehicle does not start in “R” range only (engine revving up).


• Select cable

• Select lever

• Line pressure linear solenoid

• Control valve

• Low & reverse clutch

• Reverse clutch


Vehicle does not start in “R” range only (engine stalls).


• Low clutch

• 2-4 brake

• Planetary gear

• Parking brake mechanism


Vehicle does not start in “D”, “3” range only (engine revving up).


• Low clutch

• One-way clutch


Vehicle does not start in “D”, “3” or “2” range only (engine revving up).


• Low clutch


Vehicle does not start in “D”, “3” or “2” range only (engine stalls).


• Reverse clutch


Vehicle starts in “R” range only (engine revving up).


• Control valve


Acceleration during standing starts is poor (high stall rpm).


• Control valve

• Low clutch

• Reverse clutch

• ATF level too low

• ATF deterioration

• Front gasket of transmission case

• Differential gear oil level too high or too low


Acceleration during standing starts is poor (low stall rpm).


• Oil pump

• Torque converter one-way clutch

• Engine performance


Acceleration is poor when select lever is in “D”, “3” or “2” range (normal stall rpm).


• TCM

• Control valve

• High clutch

• 2-4 brake

• Planetary gear


Acceleration is poor when select lever is in “R” (normal stall rpm).


• Control valve

• High clutch

• 2-4 brake

• Planetary gear


No shift occurs from 1st to 2nd gear.


• TCM

• Rear vehicle speed sensor

• Front vehicle speed sensor

• Accelerator pedal position sensor

• Control valve

• 2-4 brake


No shift occurs from 2nd to 3rd gear.


• TCM

• Control valve

• High clutch


No shift occurs from 3rd to 4th gear.


• TCM

• ATF temperature sensor

• Control valve

• 2-4 brake


Engine brake is not effected when select lever is in “3” range.


• Inhibitor switch

• TCM

• Accelerator pedal position sensor

• Control valve


Engine brake is not effected when select lever is in “3” or “2” range.


• Control valve


Engine brake is not effected when select lever is in “1” range.


• Control valve

• Low & reverse brake


Shift characteristics are erroneous.


• Inhibitor switch

• TCM

• Front vehicle speed sensor

• Rear vehicle speed sensor

• Accelerator pedal position sensor

• Control valve

• Ground earth


No lock-up occurs.


• TCM

• Accelerator pedal position sensor

• ATF temperature sensor

• Control valve

• Lock-up facing

• Engine speed signal


Parking brake is not effected.


• Select cable

• Select lever

• Parking mechanism


Shift lever cannot be moved or is hard to move from “P” range.

ATF spurts out.


• ATF level too high


Differential oil spurts out.


• Differential gear oil too high


Differential oil level changes excessively.


• Seal pipe

• Double oil seal


Odor is produced from ATF supply pipe.


• High clutch

• 2-4 brake

• Low & reverse clutch

• Reverse clutch

• Lock-up facing

• ATF deterioration


Shock occurs from 1st to 2nd gear.


• TCM

• Torque converter turbine speed sensor

• Accelerator pedal position sensor

• 2-4 brake duty solenoid

• ATF temperature sensor

• Line pressure linear solenoid

• Control valve

• 2-4 brake

• ATF deterioration

• Engine performance

• Low & reverse duty solenoid


Slippage occurs from 1st to 2nd gear.


• TCM

• Accelerator pedal position sensor

• 2-4 brake duty solenoid

• ATF temperature sensor

• Line pressure linear solenoid

• Control valve

• 2-4 brake


Shock occurs from 2nd to 3rd gear.


• TCM

• Torque converter turbine speed sensor

• Accelerator pedal position sensor

• 2-4 brake duty solenoid

• ATF temperature sensor

• Line pressure linear solenoid

• Low & reverse duty solenoid

• Control valve

• High clutch

• 2-4 brake

• ATF deterioration

• Engine performance

• High clutch duty solenoid


Slippage occurs from 2nd to 3rd gear.


• TCM

• Accelerator pedal position sensor

• 2-4 brake duty solenoid

• ATF temperature sensor

• Line pressure linear solenoid

• Control valve

• High clutch

• 2-4 brake

• Low & reverse duty solenoid


Shock occurs from 3rd to 4th gear.


• TCM

• Torque converter turbine speed sensor

• Accelerator pedal position sensor

• 2-4 brake duty solenoid

• ATF temperature sensor

• Line pressure linear solenoid

• Control valve

• Low clutch duty solenoid

• 2-4 brake

• ATF deterioration

• Engine performance


Slippage occurs from 3rd to 4th gear.


• TCM

• Accelerator pedal position sensor

• 2-4 brake duty solenoid

• ATF temperature sensor

• Line pressure linear solenoid

• Control valve

• 2-4 brake


Shock occurs when select lever is moved from “3” to “2” range.


• TCM

• Torque converter turbine speed sensor

• Accelerator pedal position sensor

• ATF temperature sensor

• Line pressure linear solenoid

• Control valve

• 2-4 brake duty solenoid

• 2-4 brake

• ATF deterioration

• High clutch duty solenoid


Shock occurs when select lever is moved from “D” to “1” range.


• TCM

• Torque converter turbine speed sensor

• Accelerator pedal position sensor

• ATF temperature sensor

• Line pressure linear solenoid

• Control valve

• ATF deterioration

• Low & reverse brake duty solenoid

• Low & reverse clutch solenoid


Shock occurs when select lever is moved from “2” to “1” range.


• TCM

• Torque converter turbine speed sensor

• Accelerator pedal position sensor

• ATF temperature sensor

• Line pressure linear solenoid

• Control valve

• Low & reverse clutch

• ATF deterioration

• 2-4 brake duty solenoid

• Low & reverse brake duty solenoid


Shock occurs when accelerator pedal is released at medium speeds.


• TCM

• Accelerator pedal position sensor

• ATF temperature sensor

• Line pressure linear solenoid

• Control valve

• Lock-up damper

• Engine performance


Vibration occurs during straight-forward operation.


• TCM

• Lock-up duty solenoid

• Lock-up facing

• Lock-up damper


Vibration occurs during turns (tight corner “braking” phenomenon).


• TCM

• Front vehicle speed sensor

• Rear vehicle speed sensor

• Accelerator pedal position sensor

• ATF temperature sensor

• Transfer clutch

• Transfer valve

• Transfer duty solenoid

• ATF deterioration

• Harness


Front wheel slippage occurs during standing starts.


• TCM

• Front vehicle speed sensor

• Accelerator pedal position sensor

• ATF temperature sensor

• Transfer clutch

• Control valve

• Transfer pipe

• Transfer duty solenoid


Vehicle is not set in FWD mode.


• TCM

• Transfer clutch

• Control valve

• Transfer duty solenoid

• FWD fuse


Select lever is hard to move.


• Select cable

• Select lever

• Detente spring

• Manual plate


Select lever is too high to move (unreasonable resistance).


• Detente spring

• Manual plate


Select lever slips out of operation during acceleration or while driving on rough terrain.


• Select cable

• Select lever

• Detente spring

• Manual plate




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