DTC P0712[FN4A-EL]

id0502a1801300

DTC P0712

Transaxle fluid temperature (TFT) sensor circuit malfunction (short to ground)
DETECTION CONDITION
•  If the PCM detects either of the following conditions for 150 s or more, the PCM determines that the TFT sensor circuit has a malfunction.
―  TFT sensor voltage 0.06 V or less and vehicle speed 20 km/h {12 mph} or more
Diagnostic support note:
•  This is a continuous monitor (CCM).
•  The MIL illuminates if the PCM detects the above malfunction conditions during the first drive cycle.
•  A PENDING CODE is not available.
•  FREEZE FRAME DATA is available.
•  The AT warning light illuminates.
•  The DTC is stored in the PCM memory.
POSSIBLE CAUSE
•  TFT sensor malfunction
•  Short to ground in wiring harness between TFT sensor and ATX terminal E
•  Short to ground in wiring harness between TFT sensor and ATX terminal H
•  Short to ground in wiring harness between ATX terminal E and PCM terminal 1AH (ZY)/1AU (Z6)/1U (LF)
•  Damaged connectors between TFT sensor and PCM
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
•  Has the FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related Service Information available?
Yes
Perform repair or diagnosis according to the available Service Information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
VERIFY CURRENT INPUT SIGNAL STATUS
•  Turn the ignition switch to the ON position (engine off).
•  Inspect the voltage at PCM terminal 1AH (ZY)/1AU (Z6)/1U (LF).
•  Is the voltage 0.06 V or more?
Yes
Go to the intermittent concern troubleshooting procedure.
(See INTERMITTENT CONCERN TROUBLESHOOTING[ZJ, ZY, Z6].)
(See INTERMITTENT CONCERN TROUBLESHOOTING[LF, L3].)
No
Go to the next step.
4
INSPECT TERMINAL CONDITION
•  Turn the ignition switch to the LOCK position.
•  Disconnect the ATX connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Are the terminals bent?
Yes
Repair or replace the terminals, then go to Step 8.
•  If the terminals cannot be repaired, replace the wiring harness, then go to Step 8.
No
Go to the next step.
5
INSPECT TFT SENSOR CIRCUIT
•  Turn the ignition switch to the ON position (engine off).
•  Verify that the voltage changes to 4.67 V or more at PCM terminal 1AH (ZY)/1AU (Z6)/1U (LF) when ATX connector is disconnected.
•  Does the voltage change?
Yes
Go to the next step.
No
Go to Step 7.
6
INSPECT TFT SENSOR CIRCUIT FOR SHORT TO GROUND
•  Inspect for continuity between ATX terminals (transaxle case side) and body ground.
―  E and body ground
―  H and body ground
•  Is there continuity?
Yes
Repair or replace the wiring harness, then go to Step 8.
No
Replace the TFT sensor, then go to Step 8.
(See TRANSAXLE FLUID TEMPERATURE (TFT) SENSOR REMOVAL/INSTALLATION[FN4A-EL].)
7
INSPECT ATX CONNECTOR CIRCUIT FOR SHORT TO GROUND
•  Turn the ignition switch to the LOCK position.
•  Inspect for continuity between ATX terminal E (wiring harness-side) and body ground.
•  Is there continuity?
Yes
Repair or replace the wiring harness, then go to the next step.
No
Go to the next step.
8
VERIFY TROUBLESHOOTING OF DTC P0712 COMPLETED
•  Make sure to reconnect all the disconnected connectors.
•  Clear the DTC from the memory using the M-MDS.
•  Drive the vehicle under the following condition for 150 s or more.
―  Vehicle speed (VSS PID) 20 km/h {12 mph} or more.
•  Is the same DTC present?
Yes
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION[ZJ, ZY, Z6].)
(See PCM INSPECTION[LF, L3].)
No
Go to the next step.
9
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “After Repair Procedure”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE[FN4A-EL].)
No
DTC troubleshooting completed.