P0725

P0725 ENGINE SPEED

Description

The engine speed signal is sent from the ECM to the TCM.


CONSULT Reference Value in Data Monitor Mode








On Board Diagnosis Logic

- This is not an OBD-II self-diagnostic item.
- Diagnostic trouble code "P0725" with CONSULT or 16th judgment flicker without CONSULT is detected when TCM does not receive the ignition signal from ECM during engine cranking or running.


Possible Cause

Harness or connectors (The ECM to the TCM circuit is open or shorted.)


DTC Confirmation Procedure


CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch "OFF"
and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.

WITH CONSULT

1.Turn ignition switch "ON" and select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT.
2.Start engine and maintain the following conditions for at least 10 consecutive seconds.
VHCL/S SE-AT: 10 km/h (6 MPH) or more
ACCEL POSI: More than 1/8
SLCT LVR POSI: "D" position
3.If DTC is detected, go to Diagnosis Procedure (see below).


Diagnosis Procedure


1. CHECK CAN COMMUNICATION LINE

Perform the self-diagnosis. Diagnosis System (TCM).
Is a malfunction in the CAN communication indicated in the results?
YES- Check CAN communication line.
NO- GO TO 2.

2. CHECK DTC WITH TCM

With CONSULT
1.Start engine.
2.Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT.
3.While monitoring engine speed, check for engine speed change corresponding to wide-open throttle position signal.
Is the inspection result normal?
YES- GO TO 3.
NO-Check the ignition signal circuit.
- Ignition Signal.

3. CHECK DTC

Perform "DTC Confirmation Procedure".
- .
Is the inspection result normal?
YES-INSPECTION END
NO- GO TO 4.

4. CHECK TCM POWER SUPPLY AND GROUND CIRCUIT

Check TCM power supply and ground circuit. Main Power Supply And Ground Circuit.
Is the inspection result normal?
YES- GO TO 5.
NO- Repair or replace damaged parts.

5. DETECT MALFUNCTIONING ITEM

Check the following.
- The A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES- Replace the control valve with TCM. Service and Repair.
NO- Repair or replace damaged parts.