brakes TOYOTA CAMRY 1999 Service Repair Manual

AUTOMATIC TRANSAXLEOPERATION ±
AX±6
2. HYDRAULIC CONTROL SYSTEM
The hydraulic control system is composed of the oil pump, the valve body, the solenoid valves, the accu-
mulators, the clutches and brakes, and the governor valve as well as the fluid passages which connect
all of these components.
Based on the hydraulic pressure created by the oil pump, the hydraulic control system governs the hy-
draulic pressure acting on the torque converter clutch, clutches and brakes in accordance with the ve-
hicle driving conditions.
There are three solenoid valves on the valve body.
The No.1 and No.2 solenoid valves are turned on and off by signals from the ECM to operate the shift
valves and change the gear shift position.
The No.3 solenoid valve is operated by signals from the ECM to engage or disengage the lock±up
clutch of the torque converter.

AUTOMATIC TRANSAXLECOMPONENT PARTS ±
AX±32
COMPONENT PARTS
GENERAL NOTES
The instructions here are organized so that you work on only one component group at a time.
This will help avoid confusion from similar±looking parts of different subassemblies being on your work-
bench at the same time.
The component groups are inspected and repaired from the converter housing side.
As much as possible, complete the inspection, repair and assembly before proceeding to the next com-
ponent group. If a component group cannot be assembled because parts are being ordered, be sure
to keep all parts of that group in a separate container while proceeding with disassembly, inspection,
repair and assembly of other component groups.
Recommended fluid for the automatic transaxle:
DEXRON ® @@@@@: [g 2]
GENERAL CLEANING NOTES:
1. All disassembled parts should be washed clean and any fluid passages and holes blown through with
compressed air.
2. When using compressed air to dry parts, always aim away from yourself to prevent accidentally spray-
ing automatic transmission fluid or kerosene in your face.
3. The recommended automatic transaxle fluid or kerosene should be used for cleaning.
PARTS ARRANGEMENT:
1. After cleaning, the parts should be arranged in the correct order to allow efficient inspection, repairs,
and reassembly.
2. When disassembling a valve body, be sure to keep each valve together with the corresponding spring.
3. New brakes and clutches that are to be used for replacement must be soaked in transaxle fluid for at
least 15 minutes before assembly.
GENERAL ASSEMBLY:
1. All oil seal rings, clutch discs, clutch plates, rotating parts, and sliding surfaces should be coated with
transmission fluid prior to reassembly.
2. All gaskets and rubber O±rings should be replaced.
3. Make sure that the ends of a snap ring are not aligned with one of the cutouts and are installed in the
groove correctly.
4. If a worn bushing is to be replaced, the subassembly containing that bushing must be replaced.
5. Check thrust bearings and races for wear or damage. Replace if necessary.
6. Use petroleum jelly to keep parts in place.
AX0EY±02

AUTOMATIC TRANSAXLEOPERATION ±
AX±5
3. HYDRAULIC CONTROL SYSTEM
The hydraulic control system is composed of the oil pump, the valve body, the solenoid valves, the accu-
mulators, the clutches and brakes as well as the fluid passages which connect all of these components.
Based on the hydraulic pressure created by the oil pump, the hydraulic control system governs the hy-
draulic pressure acting on the torque converter clutch, clutches and brakes in accordance with the ve-
hicle driving conditions.
There are three solenoid valves on the valve body.
The No.1 and No.2 solenoid vales are turned on and off by signals from the ECM to operate the shift
valves and change the gear shift position.
The SL solenoid valve is operated by signals from the ECM to engage or disengage the lock±up clutch
of the torque converter clutch.
The SLN solenoid valve is operated by signals from the ECM to control the engagement speed and
reduce gear shift shock.
AX01A±0B

AUTOMATIC TRANSAXLECOMPONENT PARTS REMOVAL ±
AX±33
GENERAL NOTES
The instructions here are organized so that you work on only one component group at a time.
This will help avoid confusion from similar±looking parts of different subassemblies being on your work-
bench at the same time.
The component groups are inspected and repaired from the converter housing side.
As much as possible, complete the inspection, repair and assembly before proceeding to the next compo-
nent group. If a component group cannot be assembled because parts are being ordered, be sure to keep
all parts of that group in a separate container while proceeding with disassembly, inspection, repair and
assembly of other component groups.
Recommended fluid for the automatic transaxle: ATF D±@@@@@: [g 2] or DEXRON®@@@@@: [g
3](DEXRON®@@@@@: [g 2])
1. GENERAL CLEANING NOTES:
(a) All disassembled parts should be washed clean and any fluid passages and holes blown through with
compressed air.
(b) When using compressed air to dry parts, always aim away from yourself to prevent accidentally spray-
ing automatic transaxle fluid or kerosene in your face.
(c) The recommended automatic transaxle fluid or kerosene should be used for cleaning.
2. PARTS ARRANGEMENT:
(a) After cleaning, the parts should be arranged in the correct order to allow efficient inspection, repairs,
and reassembly.
(b) When disassembling a valve body, be sure to keep each valve together with the corresponding spring.
(c) New brakes and clutches that are to be used for replacement must be soaked in transaxle fluid for at
least fifteen minutes before assembly.
3. GENERAL ASSEMBLY:
(a) All oil seal rings, clutch discs, clutch plates, rotating parts, and sliding surfaces should be coated with
transmission fluid prior to reassembly.
(b) All gaskets and rubber O±rings should be replaced.
(c) Make sure that the ends of a snap ring are not aligned with one of the cutouts and are installed in the
groove correctly.
(d) If a worn bushing is to be replaced, the subassembly containing that bushing must be replaced.
(e) Check thrust bearings and races for wear or damage. Replace if necessary.
(f) Use petroleum jelly to keep parts in place.
AX02T±07

AUTOMATIC TRANSAXLEOPERATION ±
AX±5
3. HYDRAULIC CONTROL SYSTEM
The hydraulic control system is composed of the oil pump, the valve body, the solenoid valves, the accu-
mulators, the clutches and brakes as well as the fluid passages which connect all of these components.
Based on the hydraulic pressure created by the oil pump, the hydraulic control system governs the hy-
draulic pressure acting on the torque converter clutch, clutches and brakes in accordance with the ve-
hicle driving conditions.
There are three solenoid valves on the valve body.
The No.1 and No.2 solenoid vales are turned on and off by signals from the ECM to operate the shift
valves and change the gear shift position.
The SL solenoid valve is operated by signals from the ECM to engage or disengage the lock±up clutch
of the torque converter clutch.
The SLN solenoid valve is operated by signals from the ECM to control the engagement speed and
reduce gear shift shock.
AX01A±0B

AUTOMATIC TRANSAXLECOMPONENT PARTS REMOVAL ±
AX±33
GENERAL NOTES
The instructions here are organized so that you work on only one component group at a time.
This will help avoid confusion from similar±looking parts of different subassemblies being on your work-
bench at the same time.
The component groups are inspected and repaired from the converter housing side.
As much as possible, complete the inspection, repair and assembly before proceeding to the next compo-
nent group. If a component group cannot be assembled because parts are being ordered, be sure to keep
all parts of that group in a separate container while proceeding with disassembly, inspection, repair and
assembly of other component groups.
Recommended fluid for the automatic transaxle: ATF D±@@@@@: [g 2] or DEXRON®@@@@@: [g
3](DEXRON®@@@@@: [g 2])
1. GENERAL CLEANING NOTES:
(a) All disassembled parts should be washed clean and any fluid passages and holes blown through with
compressed air.
(b) When using compressed air to dry parts, always aim away from yourself to prevent accidentally spray-
ing automatic transaxle fluid or kerosene in your face.
(c) The recommended automatic transaxle fluid or kerosene should be used for cleaning.
2. PARTS ARRANGEMENT:
(a) After cleaning, the parts should be arranged in the correct order to allow efficient inspection, repairs,
and reassembly.
(b) When disassembling a valve body, be sure to keep each valve together with the corresponding spring.
(c) New brakes and clutches that are to be used for replacement must be soaked in transaxle fluid for at
least fifteen minutes before assembly.
3. GENERAL ASSEMBLY:
(a) All oil seal rings, clutch discs, clutch plates, rotating parts, and sliding surfaces should be coated with
transmission fluid prior to reassembly.
(b) All gaskets and rubber O±rings should be replaced.
(c) Make sure that the ends of a snap ring are not aligned with one of the cutouts and are installed in the
groove correctly.
(d) If a worn bushing is to be replaced, the subassembly containing that bushing must be replaced.
(e) Check thrust bearings and races for wear or damage. Replace if necessary.
(f) Use petroleum jelly to keep parts in place.
AX02T±07

BO0NG±01
BO0632
BO0633
15°
45° BO±124
± BODYSEAT BELT
2472 Author: Date:
INSPECTION
CAUTION:
Replace the seat belt assembly (outer belt, inner belt, bolts,
nuts or sill±bar) if it has been used in a severe impact. The
entire assembly should be replaced even if damage is not
obvious.
1. All Seat Belt:
RUNNING TEST (IN SAFE AREA)
(a) Fasten the front seat belts.
(b) Drive the car at 10 mph (16 km/h) and slam on the brakes.
Check that the belt locks and cannot be extended at this
time.
HINT:
Conduct this test in a safe area. If the belt does not lock, remove
the belt mechanism assembly and conduct the following static
check. Also, whenever installing a new belt assembly, verify the
proper operation before installation.
2. Driver 's Seat Belt (ELR):
STATIC TEST
(a) Make sure that the belt locks when pulled out quickly.
(b) Remove the locking retractor assembly.
(c) Tilt the retractor slowly.
(d) Make sure that the belt can be pulled out at a tilt of 15 de-
grees or less, and cannot be pulled out over 45 degrees
of tilt.
If a problem is found, replace the assembly.
3. Front RH Seat Belt and Rear Seat Belt (ALR/ELR):
STATIC TEST
(a) Make sure that the belt locks when pulled out quickly.
(b) Remove the locking retractor assembly.
(c) Pull out the whole belt and measure the length of the
whole belt.
Then retract the belt slightly and pull it out again
(d) Make sure that the belt cannot be extended further.
If a problem is found, replace the assembly.

BO2E1±01
BO0632
BO0633
15°
45°
± BODYSEAT BELT
BO±27
INSPECTION
CAUTION:
Replace the seat belt assembly (Outer belt, inner belt,
bolts, nuts or sill±bar) if it has been used in a severe im-
pact. The entire assembly should be replaced even if dam-
age is not obvious.
1. All seat belt:
RUNNING TEST IN SAFE AREA
(a) Fasten the front seat belts.
(b) Drive the car at 10 m/h (16 km/h) and slam on the brakes.
Check that the belt locks and cannot be extended at this
time.
HINT:
Conduct this test in a safe area. If the belt does not lock, remove
the belt mechanism assembly and conduct the following static
check. Also whenever installing a new belt assembly, verify the
proper operation before installation.
2. Driver 's seat belt (ELR):
STATIC TEST
(a) Make sure that the belt locks when pulled out quickly.
(b) Remove the locking retractor assembly.
(c) Tilt the retractor slowly.
(d) Make sure that the belt can be pulled out at a tilt of 15 de-
grees or less, and cannot be pulled out over 45 degrees
of tilt.
If a problem is found, replace the assembly.
3. Except driver's seat belt (ALR/ELR):
STATIC TEST
(a) Make sure that the belt locks when pulled out quickly.
(b) Remove the locking retractor assembly.
(c) Pull out the whole belt and measure the length of the
whole belt. Then retract the belt slightly and pull it out
again.
(d) Make sure that the belt cannot be extended further.
If a problem is found, replace the assembly.

± BRAKETROUBLESHOOTING
BR±3
2026 Author: Date:
Hard pedal but brake inefficient
1. Fluid leaks for brake system
2. Air in brake system
3. Pad or lining (Worn)
4. Pad or lining (Cracked or distorted)
5. Rear brake shoe clearance (Out of adjustment)
6. Pad or lining (Oily)
7. Pad or lining (Glazed)
8. Disc (Scored)
9. Booster push rod (Out of adjustment)
10.Vacuum leaks for booster systemDI±536
BR±4
BR±21
BR±31
BR±36
BR±21
BR±31
BR±36
BR±35
BR±21
BR±31
BR±36
BR±21
BR±31
BR±36
BR±24
BR±39
BR±20
BR±18
Noise from brakes
1. Pad or lining (Cracked or distorted)
2. Installation bolt (Loose)
3. Disc (Scored)
4. Pad support plate (Loose)
5. Sliding pin (Worn)
6. Pad or lining (Dirty)
7. Pad or lining (Glazed)
8. Anchor, return or tension spring (Faulty)
9. Anti±squeal shim (Damaged)
10.Shoe hold±down spring (Damaged)BR±21
BR±31
BR±36
BR±24
BR±39
BR±24
BR±39
BR±21
BR±36
BR±24
BR±39
BR±21
BR±31
BR±36
BR±21
BR±31
BR±36
BR±31
BR±45
BR±21
BR±36
BR±31
BR±45

A03604
ECM
STP 4
E7
G±W G±WJ27 J28 1R 1R
1SJ27
J/C
AC Instrument Panel J/B
5
2 4
7
12
G±WLight
Failure
Sensor
Stop
Light
(LH) Stop
Light
(RH) G±R
2
52
5
W±B
W±B
BP High
Mount
Stop
Light
2
1R
A
A
J40
J/C
BL
1
W±B
Stop Light
Switch
2
BatteryW±B W
1C 7
STOP
41BInstrument
Panel J/B
B±R
B±R
F9 2 F9 1
ALT
F4MAIN
FL
FL Block
G±W
1
*1: w/o Immobiliser
*2: w/ Immobiliser(*1) (*2)
E79 DI±170
± DIAGNOSTICSENGINE (5S±FE)
405 Author: Date:
DTC P1520 Stop Light Switch Signal Malfunction (Only
for A/T)
CIRCUIT DESCRIPTION
This signal is used to detect when the brakes have been applied. The STP signal voltage is the same as
the voltage supplied to the stop lights.
The STP signal is used mainly to control the fuel cut±off engine speed. (The fuel cut±off engine speed is
reduced slightly when the vehicle is braking.)
DTC No.DTC Detecting ConditionTrouble Area
P1520Stop light switch does not turn off even once vehicle is driven
(2 trip detection logic)
Short in stop light switch signal circuit

Stop light switch

ECM
WIRING DIAGRAM
DI01H±07