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DIAGNOSIS 7A2-95
No. A2: Vehicle Does Not Run in R Range • Vehicle does not run in R range only. • It runs correctly in D, 3, 2, and L ranges. • Some trouble in the AT main unit is supposed (since the vehicle can run even if the TCM is defective). However, since the trouble of the main unit may be originated from the sensor system or output system, these systems should be also checked to prevent reproduce of the trouble. • Slip of clutch (reverse clutch, low & reverse brake).
If slip of clutch is caused, a DTC (gear ratio error) is stored. • Shortage or faulty quality of ATF. • Dropped line pressure. • Trouble in control valve body (faulty operation, sticking, clogged oil passage). • Disordered select cable (select indicator light indicates R but the hydraulic system is not in the R range). • Faulty torque generated. • Trouble in the torque converter (faulty operation, sticking), insufficient engine output. • Malfunction of parking mechanism.
Step Action Yes No 1 Dislocation or disordered of select lever.
Go to Step 2
Adjust the select cable. 2 Are any DTCs stored? Go to DTC Chart Go to Step 3 3 Are the quantity, contamination and smell normal?
If the ATF level is low, replenish up to the specified level.
Go to Step 4
If ATF is extremely black and contaminated and smells burnt, slip of the clutch is supposed. Overhaul the AT unit. 4 Is the stall revolution correct in R range? Refer the STALL Go to Step 5 Repair the defect or replace. 5 Is the line pressure correct? Refer the LINE PRESSURE Trouble in the AT assembly or control valve. Repair the defect or replace.
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