A/T Does Not Shift: D3 -> D4
11. A/T Does Not Shift: D3 -> D4SYMPTOM:
^ 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"?
Yes or No
Yes >> GO TO 2.
No >> Go to AT-227, "7. Vehicle Does Not Creep Forward in D, 3, 2 or 1 Position" and AT-230, "8. Vehicle Cannot Be Started From D1". Vehicle Does Not Creep Forward In D, 3, 2 or 1 Position 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 circuits?
^ Park/Neutral Position (PNP) switch
^ Overdrive control switch
^ A/T fluid temperature sensor
^ Vehicle speed sensor A/T (revolution sensor)
^ Shift solenoid valve A or B
^ 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" or "DTC VEHICLE SPEED SENSOR MTR".
No >> GO TO 3.
3. CHECK THROTTLE POSITION SENSOR ACCELERATOR PEDAL POSITION (APP) SENSOR 1
Check throttle position sensor [Accelerator Pedal Position (APP) sensor]. Refer to "DTC P0122, P0123 TP SENSOR" and "DTC P2122, P2123 APP SENSOR".
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. Refer to "Control Valve Assembly and Accumulators".
2. Check the items:
^ Shift valve B
^ Overrun clutch control valve
^ Shift solenoid valve B
^ Pilot valve
^ Pilot filter
3. Disassemble A/T.
4. Check the 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. Refer to "Control Valve Assembly and Accumulators".
2. Check the 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.