A/T Does Not Shift: D5 -> D4

A/T Does Not Shift: 5th gear -> 4th gear

SYMPTOM: When shifted from D5 to 44 position, does not downshift from 5th to 4th gears.

DIAGNOSTIC PROCEDURE
1. CHECK SELF-DIAGNOSIS RESULTS Perform self-diagnosis. Refer to AT-85, "SELF-DIAGNOSTIC RESULT MODE". With Manufacturer's Scan Tool

Do the self-diagnosis results indicate PNP switch, ATF pressure switch 1?
YES >> Check the malfunctioning system. Refer to "DTC P1705 THROTTLE POSITION SENSOR" P1705, "DTC P1841 ATF PRESSURE SWITCH 1" P1841.
NO >> GO TO 2.

2. CHECK 4TH POSITION SWITCH CIRCUIT
With CONSULT-II
1. Turn ignition switch "ON".









2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT-II.
3. Read out "OD CONT SW" switch moving selector lever to each position.

Without CONSULT-II
1. Turn ignition switch "ON". (Do not start engine)









2. Check voltage between A/T device harness connector terminal and ground.

OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.

3. CHECK A/T FLUID LEVEL





Check the A/T fluid level.

OK or NG
OK >> GO TO 4.
NG >> Refill ATF.

4. CHECK CONTROL CABLE





Check the control cable.

OK or NG
OK >> GO TO 5.
NG >> Adjust control cable.

5. CHECK A/T FLUID CONDITION
1. Remove oil pan.





2. Check A/T fluid condition.

OK or NG
NG >> GO TO 9.

6. DETECT MALFUNCTIONING ITEM
^ Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to "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.

OK or NG
OK >> INSPECTION END
NG >> GO TO 8.

8. PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection.
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 "Symptom Chart" (Symptom No.14) Symptom Chart.

OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.