P0726

DTC P0726 ENGINE SPEED INPUT CIRCUIT PERFORMANCE
Description
The engine speed signal is sent from the ECM to the TCM.

On Board Diagnosis Logic
- This is not an OBD-II self-diagnostic item.
- Diagnostic trouble code "ENG SPD INP PERFOR" with CONSULT-II or 14th judgement flicker without CONSULT-II is detected when malfunction is detected in engine speed signal, actual engine torque signal or torque reduction signal that is output from ECM through CAN communication.

Possible Cause
- Harness or connectors (The signal circuit is open or shorted.)
- ECM

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 procedure to confirm the malfunction is eliminated.

WITH CONSULT-II





1. Turn ignition switch "ON" and select "A/T" with "DATA MONITOR" mode in CONSULT-II.
2. Start engine.
3. Drive vehicle and maintain the conditions for at least 10 consecutive seconds.
VHCL/S SE-A/T: 10 km/h (6 MPH) or more
ACCELE ANGLE: More than 10%
SLOT LVR POSI: "D" position
4. If DTC is detected, procede to next step, "Diagnostic Procedure".

Diagnostic Procedure
1. CHECK DTC WITH ECM

With CONSULT-II





1. Turn ignition switch "ON". (Do not start engine.)
2. Select "ENGINE" with "SELF-DIAG RESULTS" mode in CONSULT-II. Refer to "CONSULT-II Function (TCM)".
OK or NG
OK >> GO TO 2.
NG >> Check the DTC detected item, go to EC-627, "INDEX FOR DTC". DTC No. Index
- If CAN communication line is detected, go to AT-465, "DTC U1000 CAN COMMUNICATION LINE". U Code Charts

2. CHECK DTC WITH TCM
With CONSULT-II





1. Start engine.
2. Select "A/T" with "DATA MONITOR" mode in CONSULT-II.
3. While monitoring "ENGINE SPEED", check for engine speed change corresponding to "ACCELE ANGLE".
OK or NG
OK >> GO TO 3.
NG >> Check the ignition signal circuit.
- Refer to EC-1287, "IGNITION SIGNAL".Ignition Signal

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

4. CHECK TCM
1. Check TCM input/output signal. 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.