DTC P0768[FN4A-EL]

id0502a1807000

DTC P0768

Shift solenoid D malfunction (electrical)

DETECTION CONDITION

•  If PCM detects either of the following conditions while driving in 4GR at D range, the PCM determines that shift solenoid D circuit has a malfunction.

―  Shift solenoid D voltage stuck at B+ after engine start

―  Shift solenoid D voltage stuck at 0 V after engine start

Diagnostic support note:

•  This is a continuous monitor (CCM).

•  The MIL illuminates if the PCM detects the above malfunction conditions during the first drive cycle.

•  A PENDING CODE is not available.

•  FREEZE FRAME DATA is available.

•  The AT warning light illuminates.

•  The DTC is stored in the PCM memory.

POSSIBLE CAUSE

•  Shift solenoid D malfunction

•  Short to ground in wiring harness between ATX terminal B and PCM terminal 1K (ZY)/1AJ (Z6)/1E (LF)

•  Short to power supply in wiring harness between ATX terminal B and PCM terminal 1K (ZY)/1AJ (Z6)/1E (LF)

•  Open circuit in wiring harness between shift solenoid D terminal A and ATX terminal B

•  Open circuit in wiring harness between ATX terminal B and PCM terminal 1K (ZY)/1AJ (Z6)/1E (LF)

•  Damaged connector between shift solenoid D and PCM

•  PCM malfunction

DTC P0768	Shift solenoid D malfunction (electrical)
DETECTION CONDITION	• If PCM detects either of the following conditions while driving in 4GR at D range, the PCM determines that shift solenoid D circuit has a malfunction. ― Shift solenoid D voltage stuck at B+ after engine start ― Shift solenoid D voltage stuck at 0 V after engine start Diagnostic support note: • This is a continuous monitor (CCM). • The MIL illuminates if the PCM detects the above malfunction conditions during the first drive cycle. • A PENDING CODE is not available. • FREEZE FRAME DATA is available. • The AT warning light illuminates. • The DTC is stored in the PCM memory.
POSSIBLE CAUSE	• Shift solenoid D malfunction • Short to ground in wiring harness between ATX terminal B and PCM terminal 1K (ZY)/1AJ (Z6)/1E (LF) • Short to power supply in wiring harness between ATX terminal B and PCM terminal 1K (ZY)/1AJ (Z6)/1E (LF) • Open circuit in wiring harness between shift solenoid D terminal A and ATX terminal B • Open circuit in wiring harness between ATX terminal B and PCM terminal 1K (ZY)/1AJ (Z6)/1E (LF) • Damaged connector between shift solenoid D and PCM • PCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA been recorded?	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 SERVICE INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available?	Yes	Perform repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	INSPECT ATX CONNECTOR FOR POOR CONNECTION • Turn the ignition switch to the LOCK position. • Disconnect the ATX connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is the connection normal?	Yes	Go to the next step.
3		No	Repair or replace the connector and/or terminals, then go to Step 11.
4	INSPECT RESISTANCE • Inspect the resistance between ATX terminal B (transaxle case side) and body ground. • Is the resistance within 10.9—26.2 ohms? (See SOLENOID VALVE INSPECTION[FN4A-EL].)	Yes	Go to Step 7.
4		No	Go to the next step.
5	INSPECT SHIFT SOLENOID D CONNECTOR FOR POOR CONNECTION • Disconnect the shift solenoid D connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is the connection normal?	Yes	Go to the next step.
5		No	Repair or replace the connector and/or terminals, then go to Step 11.
6	INSPECT RESISTANCE • Inspect the resistance between shift solenoid D terminal A (part-side) and body ground. • Is the resistance within 10.9—26.2 ohms? (See SOLENOID VALVE INSPECTION[FN4A-EL].)	Yes	Replace the solenoid wiring harness, then go to Step 11.
6		No	Verify shift solenoid D installation. • If solenoid installed correctly, replace the solenoid, then go to Step 11. (See SOLENOID VALVE REMOVAL/INSTALLATION[FN4A-EL].)
7	INSPECT PCM CONNECTOR FOR POOR CONNECTION • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is the connection normal?	Yes	Go to the next step.
7		No	Repair or replace the connector and/or terminals, then go to Step 11.
8	INSPECT ATX CONNECTOR CIRCUIT FOR OPEN CIRCUIT • Inspect for continuity between PCM terminal 1K (ZY)/1AJ (Z6)/1E (LF) (wiring harness-side) and ATX terminal B (wiring harness-side). • Is there continuity between terminals?	Yes	Go to the next step.
8		No	Repair or replace the wiring harness, then go to Step 11.
9	INSPECT ATX CONNECTOR CIRCUIT FOR SHORT TO POWER SUPPLY • Turn the ignition switch to the ON position (engine off). • Inspect the voltage at ATX terminal B (wiring harness-side). • Is the voltage 0 V?	Yes	Go to the next step.
9		No	Repair or replace the wiring harness, then go to Step 11.
10	INSPECT PCM CIRCUIT FOR SHORT TO GROUND • Turn the ignition switch to the LOCK position. • Inspect for continuity between PCM terminal 1K (ZY)/1AJ (Z6)/1E (LF) (wiring harness-side) and body ground. • Is there continuity?	Yes	Repair or replace the wiring harness, then go to Step 11.
10		No	Go to the next step.
11	VERIFY TROUBLESHOOTING OF DTC P0768 COMPLETED • Make sure to reconnect all the disconnected connectors. • Clear the DTC from the memory using the M-MDS. • Drive the vehicle in D range and make sure that gears shift smoothly from 1GR to 4GR. • Are any DTCs present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION[ZJ, ZY, Z6].) (See PCM REMOVAL/INSTALLATION[LF, L3].)
11		No	No concern is detected. Go to the next step.
12	VERIFY AFTER REPAIR PROCEDURE • Perform the "After Repair Procedure". (See AFTER REPAIR PROCEDURE[FN4A-EL].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE[FN4A-EL].)
12		No	DTC troubleshooting completed.