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DTC P0763

BHE050201026W22

DTC P0763 | Shift solenoid B circuit malfunction (open circuit/short to ground or power supply)
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DETECTION CONDITION | • Open or short circuit in shift solenoid B signal system (when the TCM monitors solenoid output voltage, voltage that differs from the ON/OFF signal output by CPU in TCM is detected). Diagnostic support note: • This is continuous monitor (CCM). • MIL illuminates if TCM detects the above malfunction condition during the first drive cycle. • PENDING CODE is not available. • FREEZE FRAME DATA is available. • AT warning light illuminates. • DTC is stored in TCM memory.
POSSIBLE CAUSE | • Shift solenoid valve B malfunction • Open circuit in wiring harness between shift solenoid valve B terminal A and TCM terminal 2S • Short to ground in wiring harness between shift solenoid valve B terminal A and TCM terminal 2S • Short to power supply in wiring harness between shift solenoid valve B terminal A and TCM terminal 2S • Damaged connector between shift solenoid valve B and TCM • TCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded? | 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 Bulletins and/or on-line repair 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 AT SOLENOID VALVE CONNECTOR FOR POOR CONNECTION • Turn the ignition switch to the LOCK position. • Disconnect the AT solenoid valve connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Are the connector and terminals normal? | Yes | Go to the next step.
No | Repair or replace the connector and/or terminal, then go to Step 13.
4 | INSPECT RESISTANCE OF SHIFT SOLENOID VALVE B • Inspect the resistance between AT solenoid valve connector (transmission case side) terminal F and body ground. • Is the resistance within 2.2-5.0 ohms? (See SOLENOID VALVE INSPECTION.) | Yes | Go to Step 9.
No | Go to the next step.
5 | INSPECT CONTROL VALVE BODY CONNECTOR FOR POOR CONNECTION • Disconnect the control valve body connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Are the connector and terminals normal? | Yes | Go to the next step.
No | Repair or replace the connector and/or terminal, then go to Step 13.
6 | INSPECT RESISTANCE OF SHIFT SOLENOID VALVE B • Inspect the resistance between control valve body (part-side) terminal G and body ground. • Is the resistance within 2.2-5.0 ohms? (See SOLENOID VALVE INSPECTION.) | Yes | Repair or replace the AT solenoid valve connector harness, then go to Step 13.
No | Go to the next step.
7 | INSPECT SHIFT SOLENOID VALVE B CONNECTOR FOR POOR CONNECTION • Disconnect the shift solenoid valve B connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Are the connector and terminals normal? | Yes | Go to the next step.
No | Repair or replace the connector and/or terminal, then go to Step 13.
8 | INSPECT RESISTANCE OF SHIFT SOLENOID VALVE B • Inspect the resistance between shift solenoid valve B (part-side) terminal A and body ground. • Is the resistance within 2.2-5.0 ohms? (See SOLENOID VALVE INSPECTION.) | Yes | Repair or replace the control valve body connector harness, then go to Step 13.
No | Verify shift solenoid valve B installation. • If shift solenoid valve B is installed correctly, replace shift solenoid valve B, then go to Step 13. (See SOLENOID VALVE REMOVAL/INSTALLATION.)
9 | INSPECT TCM CONNECTOR FOR POOR CONNECTION • Disconnect the TCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Are the connector and terminals normal? | Yes | Go to the next step.
No | Repair or replace the connector and/or terminal, then go to Step 13.
10 | INSPECT AT SOLENOID VALVE CONNECTOR CIRCUIT FOR OPEN CIRCUIT • Inspect for continuity between the TCM (wiring harness-side) terminal 2S and AT solenoid valve connector (wiring harness-side) terminal F. • Is there continuity between the terminals? | Yes | Go to the next step.
No | Repair or replace the wiring harness, then go to Step 13.
11 | INSPECT AT SOLENOID VALVE CONNECTOR CIRCUIT FOR SHORT TO POWER SUPPLY • Turn the ignition switch to the ON position (engine off). • Inspect the voltage at AT solenoid valve connector (wiring harness-side) terminal F. • Is the voltage 0 V? | Yes | Go to the next step.
No | Repair or replace the wiring harness, then go to Step 13.
12 | INSPECT TCM CIRCUIT FOR SHORT TO GROUND • Turn the ignition switch to the LOCK position. • Inspect for continuity between the TCM (wiring harness-side) terminal 2S and body ground. • Is there continuity? | Yes | Repair or replace the wiring harness, then go to the next step.
No | Go to the next step.
13 | VERIFY TROUBLESHOOTING OF DTC P0763 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the TCM memory using the WDS or equivalent. • Drive the vehicle in D range and make sure that the gears shift smoothly from 1GR to 4GR. • Is the same DTC present? | Yes | Replace the TCM, then go to the next step. (See TCM REMOVAL/INSTALLATION.)
No | Go to the next step.
14 | VERIFY AFTER REPAIR PROCEDURE • Perform the "After Repair Procedure". (See AFTER REPAIR PROCEDURE [RC4A-EL].) • Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [RC4A-EL].)
No | DTC troubleshooting completed.