A/T Does Not Shift: 5th Gear -> 4th Gear (Column Shift Models)

A/T Does Not Shift: 5th gear -> 4th gear (Column Shift Models)

SYMPTOM: When shifted from 5M to 4M position in manual mode, does not downshift from 5th to 4th gear.

DIAGNOSTIC PROCEDURE

1. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT-89, "SELF-DIAGNOSTIC RESULT MODE". Self-Diagnostic Result Mode
Do the self-diagnostic results indicate PNP switch, ATF pressure switch 1?
YES >> Check the malfunctioning system.
Refer to AT-103, "DTC P0705 PARK/NEUTRAL POSITION SWITCH". P0705
Refer to AT-161, "DTC P1841 ATF PRESSURE SWITCH 1". P1841
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 CONTROL LINKAGE





Check the control linkage.
^ Refer to AT-233, "Checking of A/T Position". Testing and Inspection
OK or NG
OK >> GO TO 4.
NG >> Adjust control linkage.

4. MANUAL MODE SWITCH
Check the manual mode switch. Refer to AT-157, "DTC P1815 MANUAL MODE SWITCH". P1841
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-54, "Fluid Condition Check". Fluid Condition Check
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-65, "Symptom Chart" (Symptom No.14). Symptom Chart
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.

7. CHECK SYMPTOM
Check again. Refer to AT-62, "Cruise Test - Part 3". Cruise Test - Part 3
OK or NG
OK >> INSPECTION END
NG >> GO TO 8.

8. CHECK TCM
1. Check TCM input/output signals. Refer to AT-86, "TCM Input/Output Signal Reference Values". 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-65, "Symptom Chart" (Symptom No.14). Symptom Chart
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.