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7A–16 AUTOMATIC TRANSMISSION (4L30–E) Chart 6: Diagnostic Trouble Code (DTC) P0730 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. 1st and 2nd gear missing or 3rd and 4th gear missing. Check appropriate shift valve. If OK replace solenoid. 2. No engine brake in any range (All ranges in Drive and Reverse are OK). – Overrun clutch seal damaged. 3. 1st and 4th gear missing or 2nd and 3rd gear missing. Shift solenoid A stuck. Replace shift solenoid A. 4. DTC P0730 is set in D range 1st gear above 3500 rpm. Go to Step 3. 5. DTC P0730 is set in D range 3rd gear between 55-80 mph. NOTE: Perform this test within safe and legal limits. Check for suspected conditions modifying delays to clutch – 4th clutch seal damaged. Was the problem found? Repair or replace — 3 Check 3rd gear in “D” in winter mode. Does vehicle move? Shift solenoid A stuck. Replace shift solenoid A. Go to Step 4 4 Check for suspected conditions modifying delays to clutch apply: – 2nd clutch seal damaged. Was the problem found? Repair or replace — |