|
|
7A–17 AUTOMATIC TRANSMISSION (4L30–E) Chart 7: Harsh 1–2 Shift Step Action Yes No 1 Check line pressure. Refer to Line Pressure Test in this section. Was line pressure normal? Check for 1–2 accumulator valve (320) stuck by foreign material in main case valve body. Use Chart 15b: Possible Causes of High Line Pressure in this section. Chart 8: Harsh 3–4 Shift Step Action Yes No 1 Check line pressure. Refer to Line Pressure Test in this section. Was line pressure normal? Go to Step 2 Use Chart 15b: Possible Causes of High Line Pressure in this section 2 1. Check for 3–4 accumulator valve (407) stuck in adapter case valve body (401). 2. Check for 3–4 accumulator piston (18) stuck in adapter case (20). Was the problem found? Repair or replace — Chart 9a: 3–2 Downshift Complaint Step Action Yes No 1 Check line pressure. Refer to Line Pressure Test in this section. Was line pressure normal? Go to Step 2 Use Chart 15a: Possible Causes of Low Line Pressure in this section 2 Does DTC P1850 set? Diagnose P1850 first Replace band apply solenoid (PWM) (323) Chart 9b: Harsh Shift When Shifting Into “D” Or Accelerating From Stop Step Action Yes No 1 Check line pressure. Refer to Line Pressure Test in this section. Was line pressure normal? Go to Step 2 Use Chart 15b: Possible Causes of High Line Pressure in this section 2 Does DTC P1850 set? Diagnose P1850 first Replace band apply solenoid (PWM) (323) |