Time Lag Test
- Perform the mechanical system test preparation. (Refer to MECHANICAL SYSTEM TEST PREPARATION .)
- Apply the parking brake firmly, and set the wheel blocks for both the front and rear wheels.
- Start the engine.
- Measure the time lag from the N position to the D position.
- Shift the selector lever from the N position to the D position with the brake pedal depressed.
- Measure the time until the shift shock is felt firmly after shifting.
- Measure the time lag from the N position to the R position using the same procedure.
- If there is any malfunction, one of the following causes may have occurred:
Condition Possible cause N to D selected Longer than specification - Line pressure is low
- Low clutch slippage
- ATF leakage from low clutch hydraulic circuit
- ATF leakage from low and reverse brake hydraulic circuit
- Shift solenoid No. 1 operation malfunction
- Shift solenoid No. 4 operation malfunction
Shorter than specification - Line pressure is high
- N-D accumulator operation malfunction
- Shift solenoid No. 1 operation malfunction
- Shift solenoid No. 4 operation malfunction
N to R selected Longer than specification - Line pressure is low
- Low and Reverse brake slippage
- R-3-5 brake slippage
- ATF leakage from R-3-5 brake hydraulic circuit
- ATF leakage from low and reverse brake hydraulic circuit
- Shift solenoid No. 3 operation malfunction
- Shift solenoid No. 4 operation malfunction
Shorter than specification - Line pressure is high
- N-R accumulator operation malfunction
- Shift solenoid No. 3 operation malfunction
- Shift solenoid No. 4 operation malfunction
Time lag
Measurement conditions Specification (s) N to D selected 0.4-0.7 N to R selected