Troubleshooting Procedure

Transmission

Automatic Transaxle - P1760 Neutral Condition AT R Range-SLC3 Stick - Troubleshooting Procedure

Component inspection1

1. IG KEY OFF.
2. Remove the TCU.
3. Measure the resistance between "S1" solenoid-valve terminal and ground terminal of "S1" solenoid-valve.
4. Measure the resistance between "S2" solenoid-valve terminal and ground terminal of "S2" solenoid-valve.
A. Specification : Approx. 11 - 15 Ohms (20°C)




5. Is resistance within specifications?
YES
1) Go to "Component Inspection 2" procedure.
NO
1) Replace solenoid-valve as necessary and Go to "Verification Vehicle Repair" procedure.

Component Inspection2

1. IG KEY OFF.
2. Remove the TCU.
3. Measure the resistance of "SLC1" "SLC2" "SLC3" "SLB1" solenoid-valves.
A. Specification : Approx. 5.0 - 5.6 Ohms (20°C)




4. Is resistance within specifications?
YES
1) Substitute with a known-good PCM/TCM and check for proper operation. If the problem is corrected, replace PCM/TCM as necessary and then go to "Verification of Vehicle Repair" procedure.
NO
1) Replace solenoid-valve as necessary and Go to "Verification Vehicle Repair" procedure.
How to perform initial learning
STEP 1) Warm-up
Raise the ATF temperature by leaving the vehicle idling or performing city drive. Check the ATF temperature using the Scan-tool and make sure it is between 66°C and 110°C.
If the ATF temperature is outside this range, work to bring the range.

CAUTION:
Do not raise the ATF temperature by Stall-Test


If the ATF temperature is not between 66°C and 110°C, initial learning cannot be performed. Before learning, check for variable speed shock or shift shock.
STEP 2) Garage shift learning
With the vehicle standing still, depress the brake and keep the shift lever in "N" for 3 seconds. Then, shift from "N" into "D", and maintain this condition for 3 seconds.
Repeat this procedure 5 times. Then repeat it 5 times in the same way for "R".
STEP 3) Garage shift control learning
In "D", with the throttle opening between 25 and 35%, drive until you reach 6th gear and a vehicle speed at 110 Km/h or higher. Then, release the accelerator pedal and coast, and bring the vehicle to a stop in 60 seconds minimum. Repeat this procedure 10 times.
STEP 4) Check learning results
Check that variable speed shock and shift shock have decreased compared to conditions before learning.
How to perform "N" position learning
If you replace the automatic transmission or TCM, be sure to initialize the learned values and perform "N" position learning.
STEP 1) Stop the vehicle by shifting the shift lever to "P" range and chock the vehicle. Turn the ignition switch on and stop the engine.

CAUTION:
Check that the vehicle does not move before operation.

STEP 2) Release the shift lock, and shift the shift lever to "N" range.
STEP 3) Check that the "N" position mark of the TCM is correct.
STEP 4) With a scan-tool, input the command of the "N" position.

CAUTION:
The command cannot be input, unless the ignition switch is on, the shift lever is in "N" range, the engine is stopped, and the vehicle speed is 0 Km/h.

Input "NG" is indicated : Check again that the "N" position mark is correct.
If it is incorrect, adjust it.
Input "OK" is indicated : Turn the ignition switch off after releasing the shift lock and shift the shift lever to "P" range.
Turn the ignition switch on after 5 seconds.
STEP 5) Shift the shift lever from "P" to "D" range, then check that the indicator displays the correct position.
Display is correct -> Check the trouble code.
Display is incorrect -> Perform the initial learning.