|
|
JUDGEMENT OF LINE PRESSURE TEST NHAT0028S03 Judgement Suspected parts At idle Line pressure is low in all positions. I Oil pump wear I Control piston damage I Pressure regulator valve or plug sticking I Spring for pressure regulator valve damaged I Fluid pressure leakage between oil strainer and pres- I Clogged strainer Line pressure is low in particular position. I Fluid pressure leakage between manual valve and I For example, line pressure is: Line pressure is high. I Maladjustment of accelerator pedal position sensor I A/T fluid temperature sensor damaged I Line pressure solenoid valve sticking I Short circuit of line pressure solenoid valve circuit I Pressure modifier valve sticking I Pressure regulator valve or plug sticking I Open in dropping resistor circuit At stall speed Line pressure is low. I Maladjustment of accelerator pedal position sensor I Line pressure solenoid valve sticking I Short circuit of line pressure solenoid valve circuit I Pressure regulator valve or plug sticking I Pressure modifier valve sticking I Pilot valve sticking SAT786A Road Test NHAT0029 DESCRIPTION NHAT0029S01 I The purpose of the test is to determine overall performance of I The road test consists of the following three parts: 1. Check before engine is started 2. Check at idle 3. Cruise test SAT496G I Before road test, familiarize yourself with all test procedures I Conduct tests on all items until specified symptom is found. GI MA EM LC EC FE AX SU BR ST RS BT HA SC EL IDX TROUBLE DIAGNOSIS — BASIC INSPECTION Line Pressure Test (Cont’d) AT-69 |