Suzuki Grand Vitara JB416 / JB420. Manual — part 225

5A-34 Automatic Transmission/Transaxle:

Line Pressure Test

S5JB0A5104016

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)

Troubleshooting

“D” range

“R” range

At idle speed

304 – 362 kPa

(3.1 – 3.7 kg/cm

2

, 44 – 53 psi)

440 – 538 kPa

(4.5 – 5.5 kg/cm

2

, 64 – 78 psi)

At stall speed

1161 – 1321 kPa

(11.8 – 13.5 kg/cm

2

, 168 – 192 psi)

1485 – 1790 kPa

(15.2 – 18.3 kg/cm

2

, 216 – 260 psi)

(A)

I5JB0A510019-01

Condition

Possible cause

Correction / Reference Item

Higher than standard
level in each range

Malfunction of pressure control solenoid
valve (High line pressure)

Inspect. If NG, replace valve body assembly.

Malfunction of primary regulator valve
(High line pressure)

Replace valve body assembly.

Automatic Transmission/Transaxle: 5A-35

Engine Brake Test

S5JB0A5104017

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

S5JB0A5104018

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.

Troubleshooting

Lower than standard level
in each range

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.

Defective O/D clutch

Inspect. If NG, replace.

Leakage from both “D” and “R” range
fluid pressure circuit

Inspect. If NG, replace valve body assembly.

Lower than standard level
in “D” range

Fluid leakage from direct clutch

Inspect. If NG, replace.

Defective O/D clutch

Inspect. If NG, replace.

Leakage from “D” range fluid pressure
circuit

Inspect. If NG, replace valve body assembly.

Lower than standard level
in “R” range

Fluid leakage from direct clutch

Inspect. If NG, replace.

Defective O/D clutch

Inspect. If NG, replace.

Fluid leakage from reverse brake

Inspect. If NG, replace.

Leakage from “R” range fluid pressure
circuit

Inspect. If NG, replace valve body assembly.

Condition

Possible cause

Correction / Reference Item

Condition

Possible cause

Correction / Reference Item

Failure to operate when
shifted down to “2” range

Faulty second coast brake

Inspect. If NG, replace.

Failure to operate when
shifted down to “L” range

Faulty reverse brake

Inspect. If NG, replace.

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.

5A-36 Automatic Transmission/Transaxle:

A/T Symptom Diagnosis

S5JB0A5104019

Trouble Diagnosis 1
Electrical repair

Condition

Possible cause

Correction / Reference Item

Excessive shift shock

Shift solenoid valve No.1 and/or No.2
circuit faulty

Inspect circuit for open, short and intermittent.
If NG, repair.

Pressure control solenoid valve circuit
faulty

Inspect circuit for open, short and intermittent.
If NG, repair.

Output shaft speed sensor circuit faulty Inspect circuit for open, short and intermittent.

If NG, repair.

Input shaft speed sensor circuit faulty

Inspect circuit for open, short and intermittent.
If NG, repair.

Transmission fluid temperature sensor
circuit faulty

Inspect circuit for open, short and intermittent.
If NG, repair.

CAN communication circuit faulty

Inspect circuit for open, short and intermittent.
If NG, repair.

Accelerator pedal position sensor circuit
faulty

Inspect circuit for open, short and intermittent
referring to “DTC P0122: Throttle Position
Sensor (Main) Circuit Low in Section 1A”,
“DTC P0123: Throttle Position Sensor (Main)
Circuit High in Section 1A”, “DTC P0222:
Throttle Position Sensor (Sub) Circuit Low in
Section 1A” and “DTC P0223: Throttle Position
Sensor (Sub) Circuit High in Section 1A”.

TCM

Substitute a known-good TCM and recheck.

ECM

Substitute a known-good ECM and recheck.

No gear shift as 3rd gear Shift solenoid valve No.1 and/or No.2

circuit faulty

Inspect circuit for open, short and intermittent.
If NG, repair.it faulty

Pressure control solenoid valve circuit
faulty

Inspect circuit for open, short and intermittent.
If NG, repair.it faulty

TCM

Substitute a known-good TCM and recheck.

Poor 1

→

2 shift

Shift solenoid valve No.2 circuit faulty

Inspect circuit for open, short and intermittent.
If NG, repair.

Output shaft speed sensor circuit faulty Inspect circuit for open, short and intermittent.

If NG, repair.

Transmission range sensor circuit faulty Inspect circuit for open, short and intermittent.

If NG, repair.

CAN communication circuit faulty

Inspect circuit for open, short and intermittent.
If NG, repair.

Accelerator pedal position sensor circuit
faulty

Inspect circuit for open, short and intermittent
referring to “DTC P0122: Throttle Position
Sensor (Main) Circuit Low in Section 1A”,
“DTC P0123: Throttle Position Sensor (Main)
Circuit High in Section 1A”, “DTC P0222:
Throttle Position Sensor (Sub) Circuit Low in
Section 1A” and “DTC P0223: Throttle Position
Sensor (Sub) Circuit High in Section 1A”.

TCM

Substitute a known-good TCM and recheck.

ECM

Substitute a known-good ECM and recheck.

Automatic Transmission/Transaxle: 5A-37

Poor 2

→

3 shift

Shift solenoid valve No.1 circuit faulty

Inspect circuit for open, short and intermittent.
If NG, repair.

Output shaft speed sensor circuit faulty Inspect circuit for open, short and intermittent.

If NG, repair.

Transmission range sensor circuit faulty Inspect circuit for open, short and intermittent.

If NG, repair.

CAN communication circuit faulty

Inspect circuit for open, short and intermittent.
If NG, repair.

Accelerator pedal position sensor circuit
faulty

Inspect circuit for open, short and intermittent
referring to “DTC P0122: Throttle Position
Sensor (Main) Circuit Low in Section 1A”,
“DTC P0123: Throttle Position Sensor (Main)
Circuit High in Section 1A”, “DTC P0222:
Throttle Position Sensor (Sub) Circuit Low in
Section 1A” and “DTC P0223: Throttle Position
Sensor (Sub) Circuit High in Section 1A”.

TCM

Substitute a known-good TCM and recheck.

ECM

Substitute a known-good ECM and recheck.

Poor 3

→

O/D shift

Shift solenoid valve No.2 circuit faulty

Inspect circuit for open, short and intermittent.
If NG, repair.

Pressure control solenoid valve circuit
faulty

Inspect circuit for open, short and intermittent.
If NG, repair.

Output shaft speed sensor circuit faulty Inspect circuit for open, short and intermittent.

If NG, repair.

Input shaft speed sensor circuit faulty

Inspect circuit for open, short and intermittent.
If NG, repair.

Transmission range sensor circuit faulty Inspect circuit for open, short and intermittent.

If NG, repair.

CAN communication circuit faulty

Inspect circuit for open, short and intermittent.
If NG, repair.

Accelerator pedal position sensor circuit
faulty

Inspect circuit for open, short and intermittent
referring to “DTC P0122: Throttle Position
Sensor (Main) Circuit Low in Section 1A”,
“DTC P0123: Throttle Position Sensor (Main)
Circuit High in Section 1A”, “DTC P0222:
Throttle Position Sensor (Sub) Circuit Low in
Section 1A” and “DTC P0223: Throttle Position
Sensor (Sub) Circuit High in Section 1A”.

“3” position switch circuit faulty

Refer to “No Gear Shift to 4th Gear”

TCM

Substitute a known-good TCM and recheck.

ECM

Substitute a known-good ECM and recheck.

Condition

Possible cause

Correction / Reference Item