Lexus ES: Pressure Control Solenoid "D" Circuit Short to Ground or Open (P271314)
DESCRIPTION
Refer to DTC P27137F.
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| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| P271314 | Pressure Control Solenoid "D" Circuit Short to Ground or Open | While the engine is running, a short to ground or open is detected in the solenoid (SLT) valve circuit for 1 second (1-trip detection logic). |
| Comes on | DTC stored | SAE Code: P2720 |
MONITOR DESCRIPTION
When an open or short to ground in the solenoid (SLT) valve circuit is detected, the ECM will determine that there is a malfunction, illuminate the MIL and store this DTC.
MONITOR STRATEGY
| Related DTC | P2720: Solenoid (SLT) valve/Range check (Low current) |
| Required sensors/components | Solenoid (SLT) valve |
| Frequency of operation | Continuous |
| Duration | Condition (a): 1 sec. Condition (b): 1.1 sec. |
| MIL operation | Immediate |
| Sequence of operation | None |
TYPICAL ENABLING CONDITIONS
| The monitor will run whenever the following DTCs are not stored | None |
| Solenoid current cut status | Not cut |
| Engine switch | On (IG) |
| Starter | OFF |
| Battery voltage | 10.5 V or more |
| Target current (0.1 sec. or more) | 0.2 A or more |
TYPICAL MALFUNCTION THRESHOLDS
| Any of the following conditions are met | (a) or (b) |
| (a) Solenoid current | Less than 0.075 A |
| (b) Solenoid high current cutout by solenoid driver IC | ON |
COMPONENT OPERATING RANGE
| Solenoid current | 0.075 A or more |
| Solenoid high current cutout by solenoid driver IC | OFF |
CONFIRMATION DRIVING PATTERN
HINT:
- After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
-
When clearing the permanent DTCs, refer to the Clear Permanent DTC procedure.
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- Connect the Techstream to the DLC3.
- Turn the engine switch on (IG) and turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the engine switch off and wait for 2 minutes or more.
- Turn the engine switch on (IG) and turn the Techstream on.
- Start the engine.
-
Wait for 2 seconds or more with the engine running. [*1]
HINT:
[*1] : Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- Enter the following menus: Powertrain / Transmission / Utility / All Readiness.
- Input the DTC: P271314.
-
Check the DTC judgment result.
Techstream Display
Description
NORMAL
- DTC judgment completed
- System normal
ABNORMAL
- DTC judgment completed
- System abnormal
INCOMPLETE
- DTC judgment not completed
- Perform driving pattern after confirming DTC enabling conditions
N/A
- Unable to perform DTC judgment
- Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.
WIRING DIAGRAM
Refer to DTC P271312.
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CAUTION / NOTICE / HINT
NOTICE:
-
Perform the universal trip to clear permanent DTCs.
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-
Perform registration and/or initialization when parts related to the automatic transaxle are replaced.
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PROCEDURE
| 1. | CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE (SOLENOID (SLT) VALVE) - ECM) |
(a) Disconnect the C78 ECM connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| C78-10 (SLT+) - C78-9 (SLT-) | 20°C (68°F) | 5.0 to 5.6 Ω |
| C78-10 (SLT+) or C78-9 (SLT-) - Body ground and other terminals | Always | 10 kΩ or higher |
| NG | .gif) | GO TO STEP 3 |
|
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| 2. | REPLACE ECM |
(a) Replace the ECM.
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| NEXT | | PERFORM REGISTRATION |
| 3. | CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM) |
(a) Disconnect the C30 transmission wire connector.
(b) Disconnect the C78 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| C30-24 (SLT+) - C78-10 (SLT+) | Always | Below 1 Ω |
| C30-23 (SLT-) - C78-9 (SLT-) | Always | Below 1 Ω |
| C30-24 (SLT+) or C78-10 (SLT+) - Body ground and other terminals | Always | 10 kΩ or higher |
| C30-23 (SLT-) or C78-9 (SLT-) - Body ground and other terminals | Always | 10 kΩ or higher |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION WIRE - ECM) |
|
| 4. | INSPECT SOLENOID (SLT) VALVE |
| (a) Remove the solenoid (SLT) valve. Click here |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| Solenoid (SLT) valve connector terminal 1 - terminal 2 | 20°C (68°F) | 5.0 to 5.6 Ω |
(c) Connect a positive (+) lead from the battery with a 21 W bulb to terminal 1 and a negative (-) lead to terminal 2 of the solenoid valve connector. Check that the valve moves and makes an operating sound.
OK:
Valve moves and makes an operating sound.
| OK | | REPAIR OR REPLACE TRANSMISSION WIRE |
| NG | | REPLACE SOLENOID (SLT) VALVE |
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