P1701

DTC P1701 TRANSMISSION CONTROL MODULE (POWER SUPPLY)

Description
When the power supply to the TCM is cut "OFF", for example because the battery is removed, and the self diagnostics memory function stops, malfunction is detected.

On Board Diagnosis Logic
^ This is not an OBD-II self-diagnostic item.
^ Diagnostic trouble code "TCM-POWER SUPPLY" with CONSULT-II is detected when TCM does not receive the voltage signal from the battery power supply.
^ This is not a malfunction message. (Whenever shutting "OFF" a power supply to the TCM, this message appears on the screen.)

Possible Cause
Harness or connectors (Battery or ignition switch and TCM circuit is open or shorted.)

DTC Confirmation Procedure

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 to "ON" position. (Do not start engine.)
2. Select "DATA MONITOR" mode for "A/T" with CONSULT-II.
3. Wait for at least 2 consecutive seconds.
4. If DTC is detected, go to "Diagnostic Procedure".

AT-POWER-01:

AT-POWER-02:

Wiring Diagram - AT - POWER

Diagnostic Procedure
1. CHECK TCM POWER SOURCE, STEP 1








1. Turn ignition switch to "OFF" position. (Do not start engine.)
2. Check voltage between TCM terminal and ground.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.

2. CHECK TCM POWER SOURCE, STEP 2








1. Turn ignition switch to "ON" position.
2. Check voltage between TCM terminal and ground.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.

3. DETECT MALFUNCTIONING ITEM
Check the following items:
^ Harness for short or open between battery and TCM terminal
^ Harness for short or open between ignition switch and TCM terminals 2, 3, 33 and 42
^ 15A fuse (No.34, located in the fuse and fusible link block) and 10A fuse (No. 71, located in the IPDM E/R)
^ Ignition switch
^ A/T PV IGN relay; Refer to "Component Inspection"
^ ECM relay
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.

4. CHECK TCM GROUND CIRCUIT





1. Turn ignition switch to "OFF" position.
2. Disconnect TCM harness connector.
3. Check continuity between TCM terminals 5, 14, 24, 46 and ground. Continuity should exist.
If OK, check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.

5. CHECK DTC
Check again. Refer to "DTC Confirmation Procedure".
OK or NG
OK >> INSPECTION END
NG >> GO TO 6.

6. PERFORM TCM INSPECTION
1. Perform TCM input/output signal inspection.
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.

Component Inspection
A/T PV IGN RELAY
1. Apply 12V direct current between A/T PV IGN relay terminals 1 and 2.








2. Check continuity between relay terminals 3 and 5.
3. If NG, replace A/T PV IGN relay