DTC P0768:00 [FN4A-EL]

id050218819700

DTC P0768:00

Shift solenoid D electrical malfunction

DETECTION CONDITION

•  The output voltage to the shift solenoid D is stuck at 0 V or B+ when the solenoid valve operates according to PCM calculation.

Diagnostic support note

•  The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle.

•  The automatic transaxle warning light illuminates if the PCM detects the above malfunction condition during the first drive cycle.

•  PENDING CODE is available.

•  FREEZE FRAME DATA is available.

•  The DTC is stored in the PCM memory.

POSSIBLE CAUSE

•  Coupler component connector or terminal malfunction

•  Short to power supply in wiring harness between shift solenoid D terminal A and PCM terminal 2AT

•  Short to GND in wiring harness between shift solenoid D terminal A and PCM terminal 2AT

•  Shift solenoid D malfunction

•  PCM connector or terminal malfunction

•  Open circuit in wiring harness between shift solenoid D terminal A and PCM terminal 2AT

•  PCM malfunction

DTC P0768:00	Shift solenoid D electrical malfunction
DETECTION CONDITION	• The output voltage to the shift solenoid D is stuck at 0 V or B+ when the solenoid valve operates according to PCM calculation. Diagnostic support note • The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle. • The automatic transaxle warning light illuminates if the PCM detects the above malfunction condition during the first drive cycle. • PENDING CODE is available. • FREEZE FRAME DATA is available. • The DTC is stored in the PCM memory.
POSSIBLE CAUSE	• Coupler component connector or terminal malfunction • Short to power supply in wiring harness between shift solenoid D terminal A and PCM terminal 2AT • Short to GND in wiring harness between shift solenoid D terminal A and PCM terminal 2AT • Shift solenoid D malfunction • PCM connector or terminal malfunction • Open circuit in wiring harness between shift solenoid D terminal A and PCM terminal 2AT • PCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA been recorded on the repair order?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2	VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related repair information available?	Yes	Perform repair or diagnosis according to the available repair information. • If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	INSPECT COUPLER COMPONENT CONNECTOR FOR POOR CONNECTION • Switch the ignition off. • Disconnect the coupler component connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion) • Is there any malfunction?	Yes	Repair or replace the terminal, then go to Step 9.
3		No	Go to the next step.
4	INSPECT SHIFT SOLENOID D CONTROL CIRCUIT FOR SHORT TO POWER SUPPLY • Switch the ignition off. • Measure the voltage between the coupler component terminal B (wiring harness-side) and body GND. • Is the voltage B+?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to Step 9.
4		No	Go to the next step.
5	INSPECT SHIFT SOLENOID D CONTROL CIRCUIT FOR SHORT TO GND • Switch the ignition off. • Inspect for continuity between the coupler component terminal B (wiring harness-side) and body GND. • Is there continuity?	Yes	Repair or replace the wiring harness for a possible short to GND, then go to Step 9.
5		No	Go to the next step.
6	INSPECT SHIFT SOLENOID D • Inspect the shift solenoid D. (See SOLENOID VALVE INSPECTION [FN4A-EL].) • Is there any malfunction?	Yes	Replace the shift solenoid D, then go to Step 9. (See SOLENOID VALVE REMOVAL/INSTALLATION [FN4A-EL].)
6		No	Go to the next step.
7	INSPECT PCM CONNECTOR FOR POOR CONNECTION • Switch the ignition off. • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion) • Is there any malfunction?	Yes	Repair or replace the terminal, then go to Step 9.
7		No	Go to the next step.
8	INSPECT SHIFT SOLENOID D CONTROL CIRCUIT FOR OPEN CIRCUIT • Switch the ignition off. • Inspect for continuity between the coupler component terminal B (wiring harness-side) and PCM terminal 2AT (wiring harness-side). • Is there continuity?	Yes	Go to the next step.
8		No	Repair or replace the wiring harness for a possible open circuit, then go to the next step.
9	VERIFY DTC TROUBLESHOOTING COMPLETED • Make sure to reconnect all the disconnected connectors. • Clear the DTC using the M-MDS. • Perform the following procedure to ensure that the DTC has been resolved: 1. Make sure that the gears shift smoothly from 1GR to 4GR. 2. Make sure that TCC operates smoothly. • Is the same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [FN4A-EL].)
9		No	Go to the next step.
10	VERIFY NO DTCs ARE PRESENT • Perform the “Reading DTCs Procedure”. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [FN4A-EL].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [FN4A-EL].)
10		No	DTC troubleshooting completed.