A/T Does Not Shift

11. A/T Does Not Shift

SYMPTOM:
^ A/T does not shift from D3 to D4 at the specified speed.
^ A/T must be warm before D3 to D4 shift will occur.

1. CHECK SYMPTOM
Are "7. Vehicle Does Not Creep Forward In D, 3, 2 Or 1 Position" and "8. Vehicle Cannot Be Started From D1"
OK?
Yes or No
Yes >> GO TO 2.
No >> Go to "7. Vehicle Does Not Creep Forward in D, 3, 2 or 1 Position" and "8. Vehicle Cannot Be Started From D1".

2. CHECK SELF-DIAGNOSTIC RESULTS
With CONSULT-II





Does self-diagnosis, after cruise test, show damage to any of the following circuits?
^ Park/neutral position (PNP) switch
^ Overdrive control switch
^ A/T fluid temperature sensor





^ Vehicle speed sensor A/T (revolution sensor)
^ Shift
^ Vehicle speed sensor MTR
Yes or No
Yes >> Check damaged circuit. Refer to "DTC P0705 PARK/NEUTRAL POSITION SWITCH", "DTC P0710 A/T FLUID TEMPERATURE SENSOR CIRCUIT", "DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)". "DTC P0750 SHIFT SOLENOID VALVE A". "DTC P0755 SHIFT SOLENOID VALVE B" for "DTC VEHICLE SPEED SENSOR MTR".
No>> GO TO 3.

3. CHECK THROTTLE POSITION SENSOR [ACCELERATOR PEDAL POSITION (APP) SENSOR]





Check throttle position sensor [accelerator pedal position (APP) sensor]. Refer to "DTC P0122, P0123 TP SENSOR" and "DTC P2122, P2123 APP SENSOR" with QR25DE), or "DTC P0122, P0123 TP SENSOR" and "DTC P2122, P2123 APP SENSOR" with VQ35DE). P0122
OK or NG
OK >> GO TO 4.
NG >> Repair or replace throttle position sensor [accelerator pedal position (APP) sensor].

4. CHECK A/T FLUID CONDITION





1. Remove oil pan.
2. Check A/T fluid condition.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.

5. DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly.
2. Check the following items:
- Shift valve B
- Overrun clutch control valve
- Shift solenoid valve B
- Pilot valve
- Pilot filter
3. Disassemble A/T.
4. Check the following items:
- Servo piston assembly
- Brake band
- Torque converter
- Oil pump assembly
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.

6. DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly.
2. Check the following items:
- Shift valve B
- Overrun clutch control valve
- Shift solenoid valve B
- Pilot valve
- Pilot filter
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. CHECK 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.