P1740

P1740 POSITION1-SHORT TO GROUND

Component Location






General Description

Position encoder provides feedback from the shift motor to the TCCU. 4 switch signals, from encoder, provide information on rotational direction and location of shift motor. The MPS(Motor Position Sensor) receives 5 volts from the TCCU. In cases where the mode switch changes; the shift motor is operates, and MPS contact point creates an ON/OFF signal. When 5 volts is received by the TCCU, it monitors operation of shift motor.






DTC Description

Related to position incoder1, this trouble code is set if case position encoder1 signal harness is either grounded or short circuited.

DTC Detecting Condition






Schematic Diagram






Signal Waveform






Terminal and Connector Inspection






CAUTION
The above value is only for reference. The actual value may differ from it according to various engine condition.

6. Is Position Encoder1 display near the specified value?
YES
1) Fault is intermittent caused by poor contact in the sensor's and/or TCCU's connector or was repaired and TCCU memory was not cleared.Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.
NO
1) Go to " Position Encoder1 harness short circuit to ground inspection " procedure.

Position Encoder1 harness short circuit to ground inspection
1. Ignition OFF.
2. H-14 TRANSFER SOLENOID & MOTOR connector : Disconnect.
3. Measure resistance between terminal 1 of TRANSFER SOLENOID & MOTOR harness connector H-14 and chassis ground .
A. Specification : Approx. Infinite Ohms






CAUTION
The above value is only for reference. The actual value may differ from it according to various engine condition.

4. Is resistance display near the specified value?
YES
1) Go to " Position Encoder1 open circuit inspection " procedure.
NO
1) Check for short to ground circuit of Position Encoder1 signal harness.
2) Repair as necessary and then go to "Verification of Vehicle Repair" procedure.

Position Encoder1 open circuit inspection
1. Ignition OFF.
2. H-14 TRANSFER SOLENOID & MOTOR connector : Disconnect.
3. Measure resistance between terminal 1 of TRANSFER SOLENOID & MOTOR harness connector H-14 and B5 of TCCU harness connector B .
A. Specification : Approx. 0 Ohms






CAUTION
The above value is only for reference. The actual value may differ from it according to various engine condition.

4. Is resistance display near the specified value?
YES
1 ) Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
2) Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.
NO
1) Check for open circuit of Position Encoder1 signal harness.
2) Repair as necessary and then go to "Verification of Vehicle Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect scan tool and select "Diagnostic Trouble Codes(DTCs)" mode
2. Using scantool, Clear DTC.
3. Operate the vehicle within DTC Enable conditions in General information.
4. Are any DTCs present ?
YES
1) Go to the applicable troubleshooting procedure.
NO
1) System is performing to specification at this time.