P0725

DTC P0725 ENGINE SPEED SIGNAL
Description
The engine speed signal is sent from the ECM to the TCM.

On Board Diagnosis Logic
^ This is an OBD-II self-diagnostic item.
^ Diagnostic trouble code "ENGINE SPEED SIG" with CONSULT-II or P0725 without CONSULT-II 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 conducted, always turn ignition switch "OFF" and wait at least 10 seconds before conducting the next test.

After the repair. perform the following procedure to confirm the malfunction is eliminated.

WITH CONSULT-II





1. Turn ignition switch ON and select "DATA MONITOR" mode for "A/T" with CONSULT-II.
2. Start engine and maintain the following conditions for at least 10 consecutive seconds.
VHCL SPEED SE: 10 km/h (6 MPH) or more
ACCELE POSI: More than 1/8
Selector lever: "D" position
3. If DTC is detected, go to "Diagnostic Procedure".

WITH GST
Follow the procedure "With CONSULT-II".

Diagnostic Procedure
1. CHECK DTC WITH ECM
With CONSULT-II





1. Turn ignition switch to ON. (Do not start engine.)
2. Select "SELF-DIAG RESULTS" mode for "ENGINE" with CONSULT-II. Refer to "CONSULT-II Function". Testing and Inspection

With GST
Follow the procedure "With CONSULT-II".
OK or NG
OK >>GO TO 2.
NG >>
Check the DTC detected item, go to "CONSULT-II Function". Testing and Inspection
^ If CAN communication line is detected, go to DTC U1000 CAN COMMUNICATION LINE".

2. CHECK DTC WITH TCM
With CONSULT-II





1. Start engine.
2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT-II.
3. While monitoring engine speed, check for engine speed change corresponding to wide-open throttle position signal.
OK or NG
OK >> GO TO 3.
NG >> Check the ignition signal circuit.
^ Refer to "IGNITION SIGNAL". Ignition System

3. CHECK DTC
Perform "DTC Confirmation Procedure".
OK or NG
OK >> INSPECTION END
NG >> GO TO 4.

4. PERFORM TCM INSPECTION
1. Perform TCM input/output signal inspection. Refer to "TCM Input/Output Signal Reference Values"
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace damaged parts.