DTC P0977:00 [AW6A-EL, AW6AX-EL]SM2445327
DTC P0977:00 [AW6A-EL, AW6AX-EL]

id0502j7823600

DTC P0977:00

Shift solenoid B circuit malfunction (short to power/open circuit)
DETECTION CONDITION
• Open or short circuit in shift solenoid B signal system (The solenoid remains on continuously for 100 ms or more even if the TCM sends a solenoid off command).
Diagnostic support note:
• The MIL does not illuminate.
• The AT warning light illuminates if the TCM detects the above malfunction condition during the first drive cycle.
• PENDING CODE is not available.
• FREEZE FRAME DATA is available.
• The DTC is stored in the TCM memory.
POSSIBLE CAUSE
• Coupler component connector or terminal malfunction
• Short to power supply in wiring harness between shift solenoid B terminal A and TCM terminal B2
• Shift solenoid B connector or terminal malfunction
• Shift solenoid B malfunction
• Open circuit between shift solenoid B terminal A and TCM terminal B2
• TCM 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.
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.
No
Go to the next step.
3
INSPECT COUPLER COMPONENT CONNECTOR FOR POOR CONNECTION
• Switch the ignition to off.
• Remove the TCM. (See TCM REMOVAL/INSTALLATION [AW6A-EL, AW6AX-EL].)
• 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 8.
No
Go to the next step.
4
INSPECT SHIFT SOLENOID B CIRCUIT FOR SHORT TO POWER SUPPLY
• Switch the ignition to off.
• Inspect for continuity between coupler component terminal B2 (wiring harness-side) and all terminals except B2 (wiring harness-side).
• Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to power supply, then go to Step 8.
No
Go to the next step.
5
INSPECT SHIFT SOLENOID B CONNECTOR FOR POOR CONNECTION
• Switch the ignition to off.
• Disconnect the shift solenoid B 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 8.
No
Go to the next step.
6
INSPECT SHIFT SOLENOID B
• Inspect the shift solenoid B. (See SOLENOID VALVE INSPECTION [AW6A-EL, AW6AX-EL].)
• Is there any malfunction?
Yes
Replace the shift solenoid B, then go to Sep 8.
(See CONTROL VALVE BODY REMOVAL/INSTALLATION [AW6A-EL, AW6AX-EL].)
No
Go to the next step.
7
INSPECT SHIFT SOLENOID B CIRCUIT FOR OPEN CIRCUIT
• Switch the ignition to off.
• Inspect for continuity between shift solenoid B terminal A (wiring harness-side) and coupler component terminal B2 (wiring harness-side).
• Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for a possible open circuit, then go to the next step.
8
VERIFY TROUBLESHOOTING OF DTC P0977:00 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. Start the engine.
2. Warm up the engine and transaxle.
3. Drive the vehicle in D range and make sure that the gears shift smoothly from 1GR to 6GR.
• Is the same DTC present?
Yes
Replace the TCM, then go to the next step.
(See TCM REMOVAL/INSTALLATION [AW6A-EL, AW6AX-EL].)
No
Go to the next step.
9
VERIFY NO DTC HAS BEEN PRESENTED
• Perform the “Reading DTCs Procedure”. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [AW6A-EL, AW6AX-EL].)
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [AW6A-EL, AW6AX-EL].)
No
DTC troubleshooting completed.