Toyota Corolla Repair Manual: Mechanical system tests
1. Perform mechanical system tests
- 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
:
- 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 conditions of wheels or wheel stoppers outside the vehicle while the other is doing the test
- Chock the 4 wheels.
- Connect an obd ii scan tool or hand–held tester to the dlc3.
- Fully apply the parking brake.
- Keep your left foot pressed firmly on the brake pedal.
- Start the engine.
- Shift into the d position. Press all the way down on the accelerator pedal with your right foot.
- Quickly read the stall speed at this time.
Stall speed: 2,550 150 rpm
- do the same test in the r position.
Stall speed: 2,550 150 rpm
Evaluation:
|
Problem |
Possible cause |
| (A) stall speed low in d and r positions |
H int : if the value is less than the specified value by 600 rpm or more, the torque converter could be faulty. |
| (B) stall speed high in d position |
|
| (C) stall speed high in r position |
|
| (D) stall speed high in d and r positions |
|
- Measure the time lag.
- When the shift lever is shifted while the engine is idling, there will be a certain time lapse or lag before the shock can be felt. This is used for checking the condition of the direct clutch, forward clutch, and 1st and reverse brake.
Notice
:
- Do the test at normal operating atf temperature 50 to 80 °c (122 to 176 °f).
- Be sure to allow 1 minute interval between tests.
- Take 3 measurements and take the average value
- Connect an obd ii scan tool or hand–held tester to the dlc3.
- Fully apply the parking brake.
- Start the engine and check idle speed.
Idle speed: 650 ± 50 rpm (in n position and a/c off)
- shift the shift lever from the n to d position. Using a stop watch, measure the time from when the lever is shifted until the shock is felt.
- Measure the time lag of n " r in the same way.
Time lag:
n → d less than 1.2 Seconds
n → r less than 1.5 Seconds
Evaluation (if n " d time or n " r time lag is longer than specified):
|
Problem |
Possible cause |
| N → d time lag is longer |
|
| N → r time lag is longer |
|
Road test
1. Problem symptom confirmation
Taking into consideration the results of the customer problem analysis,
try to reproduce the symptoms
of the trouble. If the problem is that the transaxle does ...
Hydraulic test
1. Perform hydraulic test
Measure the line pressure.
Notice:
Do the test at normal operation atf temperature 50 to 80 °c (122 to
176 °f).
The line pressure test should always be carrie ...
Other materials:
Inspection procedure
1 Check source voltage
Measure the voltage of the battery.
Ok:
voltage: 10 – 14 v
2 Check air bag sensor assy center
Disconnect the negative (–) terminal cable from the battery, and wait at
least for 90 seconds.
disconnect the connectors from the airbag sensor assy cent ...
What to do if... (Troubleshooting)
If there is a problem with the hands-free system or a Bluetooth® device, first
check the table below.
► When using the hands-free system with a
Bluetooth® device
► When registering/connecting a cellular
phone
► When making/receiving a call
► When using the pho ...
Inspection procedure
1 Inspect transmission wire(s1)
Disconnect the transmission wire connector from the
transaxle.
measure the resistance according to the value(s) in the
table below.
Standard:
2 Check harness and connector(transmission wire – ecm)
Connect the transmission connecto ...