Toyota Corolla (E120) 2002–2008 Repair Manual / Diagnostics / Electronic controlled automatic transaxle / Mechanical system tests
Toyota Corolla (E120): 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 |
|
Other materials:
Circuit description
The d squib circuit consists of the airbag sensor assy center, spiral cable
sub–assy and horn button assy.
It causes the srs to deploy when the srs deployment conditions are satisfied.
Dtc b1180/17 is recorded when a short is detected in the d squib circuit (2nd
step).
Wiring diagra ...
Wireless remote control/electronic key battery
Replace the battery with a new one if it is depleted.
You will need the following items:
● Flathead screwdriver
● Small flathead screwdriver
● Lithium battery CR2016 (vehicles without a smart key system), or CR2032 (vehicles
with a smart key system)
Replacing the battery
...
System description
The ecm uses signals from the vehicle speed sensor and crankshaft position
sensor to detect the actual
gear position (1st, 2nd, 3rd or o/d gear).
Then the ecm compares the actual gear with the shift schedule in the ecm memory
to detect the mechanical
trouble of the shift solenoid valves, th ...