Suzuki Grand Vitara JB627. Manual — part 212
5A-32 Automatic Transmission/Transaxle:
Time Lag Test
S6JB0B5104013
This test is to check conditions of clutch, reverse brake and fluid pressure. “Time lag” means time elapsed since select
lever is shifted with engine idling till shock is felt.
1) With chocks placed before and behind front and rear wheels respectively, depress brake pedal.
2) Start engine.
3) With stop watch ready, shift select lever from “N” to “D” range and measure time from that moment till shock is felt.
4) Similarly measure time lag by shifting select lever from “N” to “R” range.
Gear shifting time lag
“N”
→ “D”: Less than 1.0 sec.
“N”
→ “R”: Less than 1.2 sec.
NOTE
• When repeating this test, be sure to wait at least one minute after select lever is shifted back to “N”
range.
• Engine should be warmed up fully for this test.
• Repeat test 3 times and take average of those data for final time lag data.
Troubleshooting
Condition
Possible cause
Correction / Reference Item
“N”
→
“D” time lag
exceeds specification
Malfunction of pressure control solenoid
valve (Low line pressure)
Inspect. If NG, replace valve body assembly.
Malfunction of primary regulator valve
(Low line pressure)
Replace valve body assembly.
Clogged oil strainer
Replace.
Faulty oil pump
Inspect. If NG, replace.
Faulty forward clutch
Inspect. If NG, replace.
Faulty one-way No.3 clutch
Inspect. If NG, replace.
Leakage from “D” range fluid pressure
circuit
Overhaul or replace valve body assembly.
“N”
→
“R” time lag
exceeds specification
Malfunction of pressure control solenoid
valve (Low line pressure)
Inspect. If NG, replace valve body assembly.
Malfunction of primary regulator valve
(Low line pressure)
Replace valve body assembly.
Clogged oil strainer
Replace.
Faulty oil pump
Inspect. If NG, replace.
Faulty reverse clutch
Inspect. If NG, replace.
Faulty 1st and reverse brake
Inspect. If NG, replace.
Faulty one-way No.1 clutch
Inspect. If NG, replace.
Leakage from “R” range fluid pressure
circuit
Overhaul or replace valve body assembly.
Automatic Transmission/Transaxle: 5A-33
Line Pressure Test
S6JB0B5104014
Purpose of this test is to check operating conditions of each part by measuring fluid pressure in fluid pressure line.
Line pressure test requires following conditions.
• Automatic fluid is at normal operating temperature (70 – 80
°C / 158 – 176 °F).
• Fluid is filled to proper level (between FULL and LOW on dipstick).
• Air conditioner switch is turned OFF.
1) Apply parking brake securely and place chocks against wheels.
2) Remove fluid pressure check hole plug bolt.
3) Attach oil pressure gauge to fluid pressure check hole in transmission case.
Special tool
(A): 09925–37811–001
CAUTION
!
After attaching oil pressure gauge, check that no fluid leakage exists.
4) Depress foot brake fully, run engine at idle and stall then check fluid pressure in “D” or “R” range.
CAUTION
!
• Do not continue running engine at stall speed longer than 5 seconds.
• After performing line pressure test, be sure to leave engine running at idle for longer than one
minute before performing another line pressure test.
Automatic transmission line pressure
5) If check result is OK, disconnect special tool, then tighten fluid pressure check hole bolt to specified torque.
Tightening torque
Fluid pressure check hole bolt: 8 N·m (0.8 kgf-m, 6.0 lb-ft)
“D” range
“R” range
At idle speed
356 – 416 kPa
(3.6 – 4.1 kg/cm
2
, 52 – 58 psi)
482 – 562 kPa
(4.9 – 5.6 kg/cm
2
, 70 – 79 psi)
At stall speed
1370 – 1480 kPa
(13.7 – 14.8 kg/cm
2
, 195 – 210 psi)
1642 – 1850 kPa
(16.5 – 18.5 kg/cm
2
, 235 – 263 psi)
(A)
I6JB01510011-01
5A-34 Automatic Transmission/Transaxle:
Troubleshooting
Engine Brake Test
S6JB0B5104015
WARNING
!
Before test, make sure that there is no vehicle behind so as to prevent rear-end collision.
1) While driving vehicle in 4th gear of “D” range, shift select lever down to “3” range and check if engine brake
operates.
2) In the same way as in Step 1), check engine brake for operation when select lever is shifted down to “L” range.
3) Engine brake should operate in the test.
Troubleshooting
“P” Range Test
S6JB0B5104016
1) Stop vehicle on a slope of 5 degrees or more, shift select lever to “P” range and at the same time apply parking
brake.
2) After stopping engine, depress brake pedal and release parking brake.
3) Then, release brake pedal gradually and check that vehicle remains stationary.
4) Depress brake pedal and shift select lever to “N” range.
5) Then, release brake pedal gradually and check that vehicle moves.
WARNING
!
Before test, make sure no one is around vehicle or down on a slope and keep watchful for safety
during test.
Condition
Possible cause
Correction / Reference Item
Higher than standard
level in each range
Malfunction of pressure control solenoid
valve-A (Low line pressure)
Inspect. If NG, replace valve body assembly.
Malfunction of primary regulator valve
(Low line pressure)
Replace valve body assembly.
Lower than standard level
in each range
Malfunction of pressure control solenoid
valve-A (Low line pressure)
Inspect. If NG, replace valve body assembly.
Malfunction of primary regulator valve
(Low line pressure)
Replace valve body assembly.
Clogged oil strainer
Replace.
Faulty oil pump
Inspect. If NG, replace.
Leakage from both “D” and “R” range
fluid pressure circuit
Overhaul or replace valve body assembly.
Lower than standard level
only in “D” range
Leakage from “D” range fluid pressure
circuit
Overhaul or replace valve body assembly.
Faulty forward clutch
Inspect. If NG, replace.
Lower than standard level
only in “R” range
Leakage from “R” range fluid pressure
circuit
Overhaul or replace valve body assembly.
Faulty reverse clutch
Inspect. If NG, replace.
Faulty 1st and reverse brake
Inspect. If NG, replace.
Condition
Possible cause
Correction / Reference Item
Failure to operate when
shifted down to “3” range
Faulty No.1 brake
Inspect. If NG, replace.
Faulty No.2 brake
Inspect. If NG, replace.
Failure to operate when
shifted down to “L” range
Faulty 1st / reverse brake
Inspect. If NG, replace.
Automatic Transmission/Transaxle: 5A-35
Troubleshooting
A/T Symptom Diagnosis
S6JB0B5104017
Trouble Diagnosis 1
Electrical repair
Condition
Possible cause
Correction / Reference Item
Vehicle moves at “P”
range or remains
stationary at “N” range
Defective parking lock pawl or spring
Inspect. If NG, repair.
Condition
Possible cause
Correction / Reference Item
Poor 1
→
2 and/or 2
→
1
shift
Transmission range sensor circuit faulty Inspect circuit for open, short and intermittent
trouble. If NG, repair.
Shift solenoid valve-B circuit faulty
Inspect circuit for open, short and intermittent
trouble. If NG, repair.
TCM
Substitute a known-good TCM and recheck.
Poor 2
→
3 and/or 3
→
2
shift
Transmission range sensor circuit faulty Inspect circuit for open, short and intermittent
trouble. If NG, repair.
TCM
Substitute a known-good TCM and recheck.
Poor 3
→
4 and/or 4
→
3
shift
Transmission range sensor circuit faulty Inspect circuit for open, short and intermittent
trouble. If NG, repair.
TCM
Substitute a known-good TCM and recheck.
Poor 4
→
5 and/or 5
→
4
shift
Transmission range sensor
Inspect circuit for open, short and intermittent
trouble. If NG, repair.
Shift solenoid valve-E circuit faulty
Inspect circuit for open, short and intermittent
trouble. If NG, repair.
Pressure control solenoid valve-B circuit
faulty
Inspect circuit for open, short and intermittent
trouble. If NG, repair.
Pressure control solenoid valve-C circuit
faulty
Inspect circuit for open, short and intermittent
trouble. If NG, repair.
Input shaft speed sensor circuit faulty
Inspect circuit for open, short and intermittent
trouble. If NG, repair.
TCM
Substitute a known-good TCM and recheck.
Incorrect gear shift point Accelerator pedal position (APP) sensor
circuit faulty
Inspect circuit for open, short and intermittent
trouble. If NG, repair.
Input shaft speed sensor circuit faulty
Inspect circuit for open, short and intermittent
trouble. If NG, repair.
Output shaft speed sensor circuit faulty Inspect circuit for open, short and intermittent
trouble. If NG, repair.
Pressure control solenoid valve-A circuit
faulty
Inspect circuit for open, short and intermittent
trouble. If NG, repair.
Transmission fluid temperature sensor A
circuit faulty
Inspect circuit for open, short and intermittent
trouble. If NG, repair.
TCM
Substitute a known-good TCM and recheck.
TCC (lock-up) function
does not operate
TCC solenoid valve circuit faulty
Inspect circuit for open, short and intermittent
trouble. If NG, repair.
Engine coolant temperature (ECT)
sensor circuit faulty
Inspect circuit for open, short and intermittent
trouble. If NG, repair.
TCM
Substitute a known-good TCM and recheck.
ECM
Substitute a known-good ECM and recheck.
No kick down
Shift solenoid valve-A circuit faulty
Inspect circuit for open, short and intermittent
trouble. If NG, repair.
Shift solenoid valve-B circuit faulty
Inspect circuit for open, short and intermittent
trouble. If NG, repair.
Higher or lower stall
speed
Pressure control solenoid valve-A circuit
faulty
Inspect circuit for open, short and intermittent
trouble. If NG, repair.
TCM
Substitute a known-good TCM and recheck.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст