A/T Does Not Shift: 2nd Gear ---> 1st Gear

A/T Does Not Shift: 2nd Gear ---> 1st Gear

SYMPTOM: When shifted from M2 to M1 position in manual mode, does not downshift from 2nd to 1st gear.

DIAGNOSTIC PROCEDURE

1.CHECK SELF-DIAGNOSTIC RESULTS

With CONSULT-III
^ Select "SELF-DIAG RESULTS" mode for "TRANSMISSION" with CONSULT-III.

Without CONSULT-III
^ Perform the self-diagnosis. Refer to AT-86, "Diagnosis Procedure without CONSULT-III". Diagnosis Procedure Without Consult-III
Is any malfunction detected by self-diagnostic results?
YES >> Check the malfunctioning system. Refer to AT-80, "CONSULT-III Function (TRANSMISSION)", AT-86, "Diagnosis Procedure without CONSULT-III".
Consult-III Function (Transmission)
Diagnosis Procedure Without Consult-III
NO >> GO TO 2.

2.CHECK A/T FLUID LEVEL
Check A/T fluid level.
OK or NG
OK >> GO TO 3.
NG >> Refill ATF.

3.CHECK A/T POSITION
Check A/T position.
OK or NG
OK >> GO TO 4.
NG >> Adjust A/T position. Refer to AT-194, "Adjustment of A/T Position". Adjustments

4.MANUAL MODE SWITCH
Check manual mode switch. Refer to AT-150. P1815
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.

5.CHECK A/T FLUID CONDITION
1. Remove oil pan.
2. Check A/T fluid condition. Refer to AT-46, "Inspections Before Trouble Diagnosis". Inspections Before Trouble Diagnosis
OK or NG
OK >> GO TO 6.
NG >> GO TO 9.

6.DETECT MALFUNCTIONING ITEM
Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT-55 "Symptom Chart" (Symptom No. 50). Symptom Chart
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.

7.CHECK SYMPTOM
Check again. Refer to AT-50, "Road Test". Road Test
OK or NG
OK >> INSPECTION END
NG >> GO TO 8.

8.CHECK TCM
1. Check TCM input/output signals. Refer to AT-79, "TCM Input/Output Signal Reference Value". Pinout Values and Diagnostic Parameters
2. If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness connector.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace damaged parts.

9.DETECT MALFUNCTIONING ITEM
Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT-55, "Symptom Chart" (Symptom No. 50). Symptom Chart
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.