Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2012 Scion xD Automatic TransFACTORY OEM SERVICE PROCEDURE
Problem Symptoms Table
HINT:
- If a normal code is displayed during the diagnostic trouble code check although the trouble still occurs, check the electrical circuits for each symptom in the order given in the charts on the following pages and proceed to the page given for troubleshooting.
- The Matrix Chart is divided into 2 chapters.
- When the circuit on which mark *1 is attached is a malfunction, DTC could be output.
Chapter 1:
Refer to the table below when the trouble cause is considered to be electrical. If the instruction Proceed to Next Suspected Area Shown in Problem Symptoms Table is given in the flowchart of each circuit, inspect the suspected areas in descending order for each symptom. If the trouble still occurs even though there are no abnormalities in the inspections listed for the symptoms, check and replace the ECM.
HINT:
*1: When a circuit with mark *1 is defective, a DTC may be output.
1. CHAPTER 1: ELECTRONIC CIRCUIT MATRIX CHART:
| Symptom | Suspected Area | Refer to |
|---|---|---|
| No up-shift (A particular gear, from 1st to 3rd gear, is not up-shifted) | ECM | Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE |
| No up-shift (3rd to 4th) | Transmission control switch circuit*1 | Refer to DTC P0705: Transmission Range Sensor Circuit Malfunction (PRNDL Input) |
| ECM | Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE | |
| No down-shift (4th to 3rd) | Transmission control switch circuit*1 | Refer to DTC P0705: Transmission Range Sensor Circuit Malfunction (PRNDL Input) |
| ECM | Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE | |
| No down-shift (A particular gear, from 3rd to 1st gear, is not down-shifted) | ECM | Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE |
| No lock-up or No lock-up off | Stop light switch circuit*1 | Refer to DIAGNOSTIC TROUBLE CODE CHART |
| Engine coolant temperature sensor circuit*1 | Refer to DIAGNOSTIC TROUBLE CODE CHART | |
| ECM | Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE | |
| Shift point too high or too low | Throttle position sensor circuit*1 | Refer to DIAGNOSTIC TROUBLE CODE CHART |
| Engine coolant temperature sensor circuit*1 | Refer to DIAGNOSTIC TROUBLE CODE CHART | |
| ECM | Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE | |
| Up-shift to 4th from 3rd while shift lever is 3 position | Transmission control switch circuit*1 | Refer to DTC P0705: Transmission Range Sensor Circuit Malfunction (PRNDL Input) |
| ECM | Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE | |
| Up-shift to 4th from 3rd while engine is cold | Engine coolant temperature sensor circuit*1 | Refer to DIAGNOSTIC TROUBLE CODE CHART |
| ECM | Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE | |
| Harsh engagement (N to D) | ECM | Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE |
| Harsh engagement (Lock-up) | ECM | Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE |
| Harsh engagement (Any driving position) | ECM | Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE |
| Poor acceleration | ECM | Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE |
| Engine stalls when starting off or stopping | ECM | Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE |
| No kick-down | ECM | Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE |
| Malfunction in shifting | Park/neutral position switch circuit*1 | Refer to DTC P0705: Transmission Range Sensor Circuit Malfunction (PRNDL Input) |
| ECM | Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE |
2. CHAPTER 2: ON-VEHICLE REPAIR AND OFF-VEHICLE REPAIR:
| Symptom | Suspected Area | Refer to |
|---|---|---|
| Vehicle does not move in any forward position and reverse position | Manual valve | Refer to INSPECTION |
| Valve body assembly | Refer to COMPONENTS | |
| Planetary gear unit | Refer to COMPONENTS | |
| Forward clutch | Refer to COMPONENTS | |
| No. 2 one-way clutch | Refer to COMPONENTS | |
| Reverse clutch | Refer to COMPONENTS | |
| 1st and reverse brake | Refer to COMPONENTS | |
| Vehicle does not move in R position | Manual valve | Refer to INSPECTION |
| Planetary gear unit | Refer to COMPONENTS | |
| Reverse Clutch | Refer to COMPONENTS | |
| 1st and reverse brake | Refer to COMPONENTS | |
| No up-shift (1st to 2nd) | Valve body assembly | Refer to COMPONENTS |
| 2nd brake | Refer to COMPONENTS | |
| No. 1 one-way clutch | Refer to COMPONENTS | |
| No up-shift (2nd to 3rd) | Valve body assembly | Refer to COMPONENTS |
| Direct clutch | Refer to COMPONENTS | |
| No up-shift (3rd to 4th) | Valve body assembly | Refer to COMPONENTS |
| O/D and 2nd brake | Refer to COMPONENTS | |
| No down-shift (4th to 3rd) | Valve body assembly | Refer to COMPONENTS |
| No down-shift (3rd to 2nd) | Valve body assembly | Refer to COMPONENTS |
| No down-shift (2nd to 1st) | Valve body assembly | Refer to COMPONENTS |
| No lock-up or No lock-up off | Shift solenoid valve SLU circuit*1 | Refer to DTC P2759: Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (Shift Solenoid Valve SLU) |
| Valve body assembly | Refer to COMPONENTS | |
| Torque converter | Refer to INSPECTION | |
| Harsh engagement (N to D) | Valve body assembly | Refer to COMPONENTS |
| Forward clutch | Refer to COMPONENTS | |
| No. 2 one-way clutch | Refer to COMPONENTS | |
| Harsh engagement (N to R) | C3 accumulator | Refer to COMPONENTS |
| Valve body assembly | Refer to COMPONENTS | |
| Reverse clutch | Refer to COMPONENTS | |
| 1st and reverse brake | Refer to COMPONENTS | |
| Harsh engagement (Lock-up) | Valve body assembly | Refer to COMPONENTS |
| Torque converter | Refer to INSPECTION | |
| Harsh engagement (1st to 2nd) | B2 accumulator | Refer to COMPONENTS |
| Valve body assembly | Refer to COMPONENTS | |
| 2nd brake | Refer to COMPONENTS | |
| No. 1 one-way clutch | Refer to COMPONENTS | |
| Harsh engagement (2nd to 3rd) | C2 accumulator | Refer to COMPONENTS |
| Valve body assembly | Refer to COMPONENTS | |
| Direct clutch | Refer to COMPONENTS | |
| Harsh engagement (3rd to 4th) | Shift solenoid valve ST*1 | Refer to DTC P0787: Shift / Timing Solenoid Low (Shift Solenoid Valve ST); DTC P0788: Shift / Timing Solenoid High (Shift Solenoid Valve ST) |
| Valve body assembly | Refer to COMPONENTS | |
| O/D and 2nd brake | Refer to COMPONENTS | |
| Harsh engagement (4th to 3rd) | Valve body assembly | Refer to COMPONENTS |
| Shift solenoid valve ST*1 | Refer to DTC P0787: Shift / Timing Solenoid Low (Shift Solenoid Valve ST); DTC P0788: Shift / Timing Solenoid High (Shift Solenoid Valve ST) | |
| Harsh engagement (D, 2, L position) | Shift solenoid valve SLT circuit*1 | Refer to DTC P2716: Pressure Control Solenoid "D" Electrical (Shift Solenoid Valve SLT) |
| Valve body assembly | Refer to COMPONENTS | |
| Slip or shudder (Forward position) | Valve body assembly | Refer to COMPONENTS |
| Oil strainer | Refer to COMPONENTS | |
| Torque converter | Refer to INSPECTION | |
| Forward clutch | Refer to COMPONENTS | |
| Direct clutch | Refer to COMPONENTS | |
| O/D and 2nd brake | Refer to COMPONENTS | |
| 2nd brake | Refer to COMPONENTS | |
| No. 1 one-way clutch | Refer to COMPONENTS | |
| No. 2 one-way clutch | Refer to COMPONENTS | |
| Slip or shudder (Reverse position) | Oil strainer | Refer to COMPONENTS |
| Valve body assembly | Refer to COMPONENTS | |
| Reverse clutch | Refer to COMPONENTS | |
| 1st and reverse brake | Refer to COMPONENTS | |
| Slip or shudder (1st) | No. 2 one-way clutch | Refer to COMPONENTS |
| Slip or shudder (2nd) | 2nd brake | Refer to COMPONENTS |
| No. 1 one-way clutch | Refer to COMPONENTS | |
| Slip or shudder (3rd) | Direct clutch | Refer to COMPONENTS |
| Slip or shudder (4th) | O/D and 2nd brake | Refer to COMPONENTS |
| Shift point too high or too low | Shift solenoid valve SLT circuit*1 | Refer to DTC P2716: Pressure Control Solenoid "D" Electrical (Shift Solenoid Valve SLT) |
| No engine braking (1st: L position) | Valve body assembly | Refer to COMPONENTS |
| 1st and reverse brake | Refer to COMPONENTS | |
| No engine braking (2nd: 2 position) | Valve body assembly | Refer to COMPONENTS |
| O/D and 2nd brake | Refer to COMPONENTS | |
| No kick-down | Valve body assembly | Refer to COMPONENTS |
| Poor acceleration (All positions) | Shift solenoid valve SLT circuit*1 | Refer to DTC P2716: Pressure Control Solenoid "D" Electrical (Shift Solenoid Valve SLT) |
| Valve body assembly | Refer to COMPONENTS | |
| Torque converter | Refer to INSPECTION | |
| Large shift shock or engine stalls when starting off or stopping | Torque converter | Refer to INSPECTION |
| Engine stalls when starting off or stopping | Shift solenoid valve SLU circuit*1 | Refer to DTC P2759: Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (Shift Solenoid Valve SLU) |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.