P0725

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





TCM TERMINALS AND REFERENCE VALUE





ON BOARD DIAGNOSIS LOGIC

DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE

CAUTION: Always drive vehicle at a safe speed.

NOTE: If "DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE" has been previously conducted, always turn ignition switch OFF and wait at least 5 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 "ENGINE" 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
THRTL POS SEN: More than 1.2V
Selector lever: D position (O/D ON)

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

AT-ENGSS-01:

Wiring Diagram-AT-ENGSS

Diagnostic Procedure
1. CHECK DTC WITH ECM
Perform diagnostic test mode 11 (self-diagnostic results) for engine control. Check ignition signal circuit condition.
OK or NG
OK >> GO TO 2
NG >> Check ignition signal circuit for engine control. Refer to "IGNITION SIGNAL" (VG33E) or "IGNITION SIGNAL" (VG33ER). Ignition Signal

2. CHECK INPUT SIGNAL
With CONSULT-II
1. Start engine.
2. Select "TCM INPUT SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT-II.








3. Read out the value of "ENGINE SPEED".
Check engine speed changes according to throttle position.

Without CONSULT-II
1. Start engine.
2. Check voltage between TCM harness connector M78 terminal 39 (P/L) and ground.
Does battery voltage (idle speed) 0.5 - 2.5 V?
Yes >> GO TO 3
NO >> Check the following items.
^ Harness for short or open between TCM and ECM
^ Resistor
^ Ignition coil
Refer to "IGNITION SIGNAL" (VG33E) or. "IGNITION SIGNAL" (VG33ER). Ignition Signal

3. CHECK DTC
Perform Diagnostic Trouble Code (DTC) confirmation procedure.
OK or NG
OK >> INSPECTION END
NG >>
1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.