DESCRIPTION Refer to DTC P27137F. Click here
 |
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
MIL | Memory |
Note | | P271312 |
Pressure Control Solenoid "D" Circuit Short to Battery |
While
the engine is running, a short to +B is detected in the solenoid (SLT)
valve circuit for 1 second (1-trip detection logic). |
- Solenoid (SLT) valve
- Transmission wire
- Harness and connector
- ECM
| Comes on |
DTC stored | SAE Code:
P2721 | MONITOR DESCRIPTION
When
a short to +B 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 | P2721: Solenoid (SLT) valve/Range check (High current)
P2721: Solenoid (SLT) valve/Range check (High voltage) | |
Required sensors/components |
Solenoid (SLT) valve | |
Frequency of operation |
Continuous | | Duration |
High current: 1 sec. High voltage: 1.3 sec. | |
MIL operation | Immediate | |
Sequence of operation | None | TYPICAL ENABLING CONDITIONS All |
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 | High current (A) |
Battery voltage | 8 V or more and less than 12.499 V | |
Target current (0.1 sec. or more) | 0.8 A or less | High current (B) |
Battery voltage | 12.5 V or more and less than 16 V | |
Target current (0 sec. or more) | 1 A or less | High voltage |
Target current | 0.2 A or more | |
Output duty cycle | 10% or more and 90% or less | TYPICAL MALFUNCTION THRESHOLDS High current:
- Any of the following conditions are met: High current (A) or (B) High current (A)
|
Battery voltage |
8 V or more and less than 12.499 V |
|
Solenoid current |
More than 0.92 A |
High current (B)
|
Battery voltage |
12.5 V or more and less than 16 V |
|
Solenoid current |
More than 1.1 A |
High voltage |
Solenoid voltage monitor | No signal | COMPONENT OPERATING RANGE High current |
Both of the following conditions are met |
(a) or (b) | | (a) Battery voltage |
8 V or more and less than 12.499 V | |
Solenoid current | 0.92 A or less | |
(b) Battery voltage | 12.5 V or more and less than 16 V | |
Solenoid current | 1.1 A or less | High voltage |
Solenoid voltage monitor | Signal input | 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.
Click here
- 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: P271312.
- 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
 CAUTION / NOTICE / HINT
NOTICE:
- Perform the universal trip to clear permanent DTCs.
Click here
- Perform registration and/or initialization when parts related to the automatic transaxle are replaced.
Click here
PROCEDURE |
1. | CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE (SOLENOID (SLT) VALVE) - ECM) |
(a) Disconnect the C56 ECM connector. (b) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
C56-67 (SLT+) or C56-37 (SLT-) - Other terminals |
Always | 10 kΩ or higher |
| NG |
 | GO TO STEP 3 |
|
OK |
 | |
(a) Replace the ECM.
Click here
| NEXT |
| PERFORM REGISTRATION |
| 3. |
CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM) |
(a) Disconnect the C52 transmission wire connector. (b) Disconnect the C56 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
C52-24 (SLT+) or C56-67 (SLT+) - Other terminals |
Always | 10 kΩ or higher | |
C52-23 (SLT-) or C56-37 (SLT-) - Other terminals |
Always | 10 kΩ or higher |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION WIRE - ECM) |
|
OK | |
| |
| 4. |
INSPECT SOLENOID (SLT) VALVE |
| (a) Remove the solenoid (SLT) valve. Click here
|
 |
|
*a | Component without harness connected
(Solenoid (SLT) Valve) | | |
(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 | | 
