P1726

DTC P1726 ELECTRIC THROTTLE CONTROL SYSTEM

Description
Electric throttle control actuator consists of throttle control motor, accelerator pedal position sensor, throttle position sensor etc. The actuator sends a signal to the ECM, and ECM sends the signal to TCM with CAN communication.

On Board Diagnosis Logic
- This is not an OBD-II self-diagnostic item.
- Diagnostic trouble code "P1726 ELEC TH CONTROL" with CONSULT-III is detected when the electronically controlled throttle for ECM is malfunctioning.

Possible Cause
Harness or connectors
(Sensor circuit is open or shorted.)

DTC Confirmation Procedure

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, touch "ERASE" on "SELF-DIAG RESULTS" and then perform the following procedure to confirm the malfunction is eliminated.

WITH CONSULT-III
1. Turn ignition switch ON. (Do not start engine.)
2. Select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Start engine and let it idle for 5 second.
4. If DTC is detected, go to "Diagnostic Procedure" below.

Diagnostic Procedure

1. CHECK DTC WITH ECM

WITH CONSULT-III
1. Turn ignition switch ON. (Do not start engine.)
2. Select "SELF-DIAG RESULTS" mode for "ENGINE" with "CONSULT-III Refer to EC-109, "CONSULT-II Function (ENGINE)". CONSULT-II Function (Engine)
OK or NG
OK >> GO TO 2.
NG >> Check the DTC Detected Item. Refer to EC-109, "CONSULT-II Function (ENGINE)". CONSULT-II Function (Engine)
^ If CAN communication line is detected, go to CVT-56. U1000

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

3. DETECT MALFUNCTIONING ITEM
Check the following:
- The TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> Replace TCM.
NG >> Repair or replace damaged parts.