DTC P0725-31 / P0725-87 / P0726-81 / P0726-86 / P1706-83
Precautions: Precautions for Diagnosing Trouble · Precautions for Disassembly and Reassembly · Precautions for Transmission / Transaxle · General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detecting condition | Trouble area |
|---|---|
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P0725-31: Engine Speed Input – No Signal Engine speed signal is not inputted although the following conditions are satisfied:
•Vehicle speed is greater than a specified value. (1 D/C detection logic but transmission warning light does not light up)•Actual gear is not neutral. •Odd clutch speed is greater than a specified value. |
•CAN communication line
•ECM •TCM |
|
P0725-87: Engine Speed Input – Missing Message Engine speed signal is not inputted although the following conditions are satisfied:
•Vehicle speed is greater than a specified value. (1 D/C detection logic but transmission warning light does not light up)•Actual gear is not neutral. •Even clutch speed is greater than a specified value. |
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P0726-81: Engine Speed Input Circuit Range / Performance – Invalid Serial Data Received This DTC is detected if the following conditions are met.
•Absolute value (engine speed – (deducts) odd clutch speed) is higher than specified value. (1 D/C detection logic but transmission warning light does not light up)•Absolute value (engine speed – (deducts) engine speed calculated by vehicle speed) is higher than specified value. |
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P0726-86: Engine Speed Input Circuit Range / Performance – Signal Invalid This DTC is detected if the following conditions are met.
•Absolute value (engine speed – (deducts) even clutch speed) is higher than specified value. (1 D/C detection logic but transmission warning light does not light up)•Absolute value (engine speed – (deducts) engine speed calculated by vehicle speed) is higher than specified value. |
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P1706-83: Torque Request Communication Error From TCM – Value of Signal Protection Calculation Incorrect ECM received Invalid signal from TCM via CAN. (1 D/C detection logic but transmission warning light does not light up) |
DTC Confirmation Procedure
WARNING:
If you do not select a suitable route and take proper precautions when performing a road test, an accident can occur.
•Select a level road with no traffic to minimize the risk of accident.
•Perform the test extremely carefully.
•Perform the road test with 2 persons, a driver and a tester.
•Perform the test extremely carefully.
•Perform the road test with 2 persons, a driver and a tester.
NOTE:
•Check that the following condition is satisfied in this procedure.
—11 V < Battery voltage < 15 V
•Check that the following DTCs are not detected in this “DTC Confirmation Procedure.”
—CAN communication (U0073-88 and U0100-87)
1)Start engine and drive vehicle.
DTC Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Was “Twin Clutch System Check” performed?
|
Go to Step 2.
|
Go to Twin Clutch System Check.
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| 2 |
DTC check
Is there any CAN-DTC detected?
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Go to troubleshooting for CAN-DTC.
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Go to Step 3.
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| 3 |
DTC check
1)Check ECM for DTC.
Is there any DTC(s) detected?
|
Go to troubleshooting for applicable DTC.
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Replace TCM and recheck DTC.
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