traction control TOYOTA AVENSIS 2005 Service Owner's Guide

±
DIAGNOSTICS ABS WITH EBD & BA & TRC & VSC SYSTEM
05±839
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 if you are using the hand±held tester and\
start from step 2 if you are not using
the hand±held tester.
1PERFORM ACTIVE TEST BY HAND±HELD TESTER(VSC WARNING LIGHT)
(a)Check that ºONº and ºOFFº of the VSC warning light is shown on th\
e combination meter by the hand±
held tester.
OKREPLACE ABS & TRACTION ACTUATOR ASSY(See page 32±57)
NG
2 INSPECT VSC WARNING LIGHT
(a)See combination meter troubleshooting on page 71±1. NG REPAIR OR REPLACE COMBINATION METERASSEMBLY
OK
3 CHECK HARNESS AND CONNECTOR(COMBINATION METER ± SKID CONTROL ECU)
(a) Check for an open or short circuit in harness and connector between the skid \
control ECU and com-
bination meter (See page 01±32).
NG REPAIR OR REPLACE HARNESS ORCONNECTOR
OK
REPLACE ABS & TRACTION ACTUATOR ASSY(See page 32±57)

C94397
GND
IG1
±
DIAGNOSTICS ABS WITH EBD & BA & TRC & VSC SYSTEM
05±829
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1CHECK DTC FOR ABS
(a)Check the DTCs are output (See page 05±756).
YESREPAIR CIRCUIT INDICATED BY OUTPUTCODE
NO
2INSPECT SKID CONTROL ECU CONNECTOR SECURELY CONNECTED
NOCONNECT CONNECTOR TO ECU
YES
3INSPECT SKID CONTROL ECU TERMINAL VOLTAGE(IG1 TERMINAL)
WITH USING HAND±HELD TESTER:
(a)Check the voltage condition, which is output from the ECU and displayed \
on the hand±held tester. OK:
ºNormalº is displayed.
WITHOUT USING HAND±HELD TESTER:
(a)Disconnect the skid control connector.
(b)Turn the ignition switch ON.
(c)Measure the voltage between terminals IG1 and GND ofthe skid control ECU harness side connector.
OK:
Voltage: 10 to 14 V
OKREPLACE ABS & TRACTION ACTUATOR ASSY (See page 32±57)
NG
4 INSPECT BATTERY
OK:
Voltage: 10 to 14 V NG INSPECT CHARGING SYSTEM
OK

05±830
±
DIAGNOSTICS ABS WITH EBD & BA & TRC & VSC SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
5CHECK HARNESS AND CONNECTOR(DLC3 ± SKID CONTROL ECU)
(a)Check for a short circuit in harness and connector between terminal Tc of the DLC3 and skid control ECU (See page 01±32).
NGREPAIR OR REPLACE HARNESS ORCONNECTOR
OK
6INSPECT ABS WARNING LIGHT
(a)See combination meter troubleshooting on page 71±1. NGREPAIR OR REPLACE COMBINATION METERASSEMBLY
OK
7CHECK HARNESS AND CONNECTOR(SKID CONTROL ECU ± COMBINATION METER)
(a)Check for an open or short circuit in harness and connector between the skid \
control ECU and com-
bination meter (See page 01±32).
NGREPAIR OR REPLACE HARNESS ORCONNECTOR
OK
REPLACE ABS & TRACTION ACTUATOR ASSY(See page 32±57)

±
DIAGNOSTICS ABS WITH EBD & BA & TRC & VSC SYSTEM
05±843
AVENSIS REPAIR MANUAL (RM1018E)
6CHECK HARNESS AND CONNECTOR(SKID CONTROL ECU ± PARKING BRAKE
SWITCH)
(a)Check for an open or short circuit in harness and connector between terminal \
PKB of the skid control
ECU and parking brake switch (See page 01±32).
NGREPAIR OR REPLACE HARNESS ORCONNECTOR
OK
7CHECK HARNESS AND CONNECTOR(SKID CONTROL ECU ± BRAKE FLUID LEVEL WARNING SWITCH)
(a)Check for an open or short circuit in harness and connector between terminal \
EBDW of the skid control
ECU and brake fluid level warning switch (See page 01±32).
NGREPAIR OR REPLACE HARNESS ORCONNECTOR
OK
8CHECK HARNESS AND CONNECTOR(SKID CONTROL ECU ± COMBINATION MERTER)
(a)Check for an open or short circuit in harness and connector between the skid \
control ECU and com-
bination meter (See page 01±32).
NGREPAIR OR REPLACE HARNESS ORCONNECTOR
OK
REPLACE ABS & TRACTION ACTUATOR ASSY(See page 32±57)

D25148
TA CDLC3 12345 768
9 1 0111 21 3 1 514 16
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)05±991
AVENSIS REPAIR MANUAL (RM1018E)
8. MECHANICAL SYSTEM TESTS
(a) Measure the stall speed.
The object of this test is to check the overall performance of the transaxle and engine by measuring
the stall speeds in the D and R ranges.
NOTICE:

Do the test at normal operating ATF temperature 50 to 80
C (122 to 176
F).

Do not continuously run this test for longer than 5 seconds.

To ensure safety, do this test in a wide, clear level area which provides good traction.

The stall test should always be carried out in pairs. One technician should observe the condi-
tions of wheels or wheel stoppers outside the vehicle while the other is doing the test.
(1) Chock the 4 wheels.
(2) Connect the hand±held tester to DLC3 or tachome-
ter to terminal TAC of DLC3 with SST.
SST 09843±18030
(3) Fully apply the parking brake.
(4) Keep your left foot pressing firmly on the brake ped-
al.
(5) Start the engine.
(6) Shift into the D range. Press all the way down on the
accelerator pedal with your right foot.
(7) Quickly read the stall speed at this time.
Stall speed: 2,400
150 rpm
(8) Do the same test in the R range.
Stall speed: 2,400
150 rpm
Evaluation:
ProblemPossible cause
(a) Stall speed low in D and R ranges

Engine output may be insufficient

Stator one±way clutch not operating properly
HINT: If the value is larger or smaller than the specified value by
600 rpm or more, the torque converter could be faulty.
(b) Stall speed high in D range

Line pressure too low

Forward clutch slipping

One±way clutch No.2 not operating properly
(c) Stall speed high in R range

Line pressure too low

Reverse clutch slipping

1st and reverse brake slipping
(d) Stall speed high in D and R ranges
Line pressure too low

Improper fluid level

05JL5−01
05−536− DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U151E)
AVENSIS Supplement (RM1045E)
MECHANICAL SYSTEM TESTS
1. PERFORM MECHANICAL SYSTEM TESTS
(a) Measure the stall speed.
The object of this test is to check the overall performance of the transaxle and engine by measuring
the stall speeds in the D and R positions.
NOTICE:
SPerform the test at the normal operating ATF (Automatic Transmission Fluid) temperature 50
to 80˚C(122 to176˚F).
SDo not continuously run this test for longer than10 seconds.
STo ensure safety, do this test in a wide, clear level area which provides good traction.
SThe stall test should always be carried out in pairs. One technician should observe the condi-
tions of wheels or wheel stoppers outside the vehicle while the other is doing the test.
(1) Chock the 4 wheels.
(2) Connect an hand−held tester to the DLC3.
(3) Fully apply the parking brake.
(4) Keep your left foot pressed firmly on the brake pedal.
(5) Start the engine.
(6) Shift into the D position. Press all the way down on the accelerator pedal with your right foot.
(7) Quickly read the stall speed at this time.
Stall speed: 2,250á150 rpm
(8) Do the same test in the R position.
Stall speed: 2,250á150 rpm
Evaluation:
ProblemPossible cause
(a) Stall engine speed is low in D and R positions
SEngine power output may be insufficient
SStator one−way clutch not operating properly
HINT: If the value is less than the specified value by 600 rpm or
more, the torque converter could be faulty.
(b) Stall engine speed is high in D position
SLine pressure is too low
SForward clutch slipping
SU/D (Underdrive) brake slipping
SU/D (Underdrive) one−way clutch not operating properly
SNo.1one−way clutch not operating properly
(c) Stall engine speed is high in R position
SLine pressure is too low
SReverse clutch slipping
S1st and reverse brake slipping
SU/D (Underdrive) brake slipping
(d) Stall engine speed is high in D and R positionsSLine pressure is too low
SImproper fluid level

05KAP–02
– DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)05–221
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
MECHANICAL SYSTEM TESTS
1. PERFORM MECHANICAL SYSTEM TESTS
(a) Measure the stall speed.
The object of this test is to check the overall performance of the transaxle and engine by measuring
the stall speeds in the D and R positions.
NOTICE:

Perform the test at the normal operating ATF (Automatic Transmission Fluid) temperature 50
to 80
C (122 to 176
F).

Do not continuously run this test for longer than 10 seconds.

To ensure safety, do this test in a wide, clear level area which provides good traction.

The stall test should always be carried out in pairs. One technician should observe the condi-
tions of wheels or wheel stoppers outside the vehicle while the other is doing the test.
(1) Chock the 4 wheels.
(2) Connect an Intelligent Tester II to the DLC3.
(3) Fully apply the parking brake.
(4) Keep your left foot pressed firmly on the brake pedal.
(5) Start the engine.
(6) Shift into the D position. Press all the way down on the accelerator pedal with your right foot.
(7) Quickly read the stall speed at this time.
Stall speed: 2,400
150 rpm
(8) Do the same test in the R position.
Stall speed: 2,400
150 rpm
Evaluation:
ProblemPossible cause
(a) Stall engine speed is low in D and R positions

Engine power output may be insufficient

Stator one–way clutch not operating properly
HINT: If the value is less than the specified value by 600 rpm or
more, the torque converter could be faulty.
(b) Stall engine speed is high in D position

Line pressure is too low

Forward clutch slipping

One–way clutch No.2 not operating properly
(c) Stall engine speed is high in R position

Line pressure is too low

Reverse clutch slipping

1st and reverse brake slipping
(d) Stall engine speed is high in D and R positions
Line pressure is too low

Improper fluid level