A/T Does Not Shift: D2 -> D1

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

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

DIAGNOSTIC PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Execute self-diagnosis.
Do the self-diagnostic results indicate PNP switch, ATF pressure switch 5?
YES >>Check the malfunctioning system. Refer to "DTC P0705 PARK/NEUTRAL POSITION SWITCH", "DTC P1845 ATF PRESSURE SWITCH 5".
NO >>GO TO 2.

2. CHECK A/T FLUID LEVEL
Check A/T fluid level again. Refer to "Checking A/T Fluid".
OK or NG
OK>> GO TO 3.
NG>> Refill ATF.

3. CHECK CONTROL LINKAGE
Check the control linkage.
Refer to "Checking of A/T Position".
OK or NG
OK>> GO TO 4.
NG>> Adjust control linkage. Refer to "Adjustment of A/T Position".

4. MANUAL MODE SWITCH
Check the manual mode switch. Refer to "DTC P1815 MANUAL MODE SWITCH".
OK or NG
OK>> GO TO 5.
NG>> Repair or replace damaged parts.

5. CHECK SYMPTOM
Check again.
OK or NG
OK >> INSPECTION END
NG>> GO TO 6.

6. PERFORM TCM INSPECTION
1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> INSPECTION END
NG>> Repair or replace damaged parts.