DTC B1B87:13 [POSITION MEMORY CONTROL SYSTEM]

id0902z8998500

DTC B1B87:13 | Rear tilt motor speed/position sensor communication fault
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DETECTION CONDITION | • Position memory control module reads signal stop from position sensor 4 times when rear tilt motor energization current is normal • Position memory control module reads that rear tilt motor energization current is at 1 A or less 4 times when motor is operating
POSSIBLE CAUSE | • Position sensor malfunction • Short to ground in wiring harness between the following terminals: ― Rear tilt motor terminal C—Position memory control module terminal 4M ― Rear tilt motor terminal A—Position memory control module terminal 4N • Rear tilt motor malfunction • Short to ground in wiring harness between the following terminals: ― Rear tilt motor terminal D—Position memory control module terminal 4E ― Rear tilt motor terminal E—Position memory control module terminal 4F • Position memory control module malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | INSPECT REAR TILT MOTOR CONNECTOR CONDITION • Turn the ignition switch to OFF position. • Disconnect the negative battery cable. • Disconnect rear tilt motor connector. • Inspect the connector and terminals (corrosion, damage, pin disconnection). • Is there any malfunction? | Yes | Repair or replace the connector or terminals, then go to the next step.
No | Go to the next step.
2 | INSPECT POSITON SENSOR • Inspect the position sensor. (See REAR TILT MOTOR INSPECTION.) • Is the position sensor normal? | Yes | Go to the next step.
No | Replace the front seat slide adjuster, then go to the next step. (See FRONT SEAT SLIDE ADJUSTER REMOVAL/INSTALLATION.)
3 | INSPECT POSITON MEMORY CONTROL MODULE CONNECTOR CONDITION • Disconnect position memory control module connector. • Inspect the connector and terminals (corrosion, damage, pin disconnection). • Is there any malfunction? | Yes | Repair or replace the connector or terminals, then go to the next step.
No | Go to the next step.
4 | INSPECT POSITION MEMORY CONTROL MODULE CIRCUIT FOR OPEN CIRCUIT • Position memory control module and rear tilt motor connectors are disconnected. • Inspect for continuity between the following terminals (wiring harness-side): ― Rear tilt motor terminal C—Position memory control module terminal 4M ― Rear tilt motor terminal A—Position memory control module terminal 4N • Is there continuity? | Yes | Go to the next step.
No | Repair or replace the wiring harness for possible open circuit, then go to the next step.
5 | INSPECT REAR TILT MOTOR • Inspect the rear tilt motor. (See REAR TILT MOTOR INSPECTION.) • Is the rear tilt motor normal? | Yes | Go to the next step.
No | Replace the front seat slide adjuster, then go to the next step. (See FRONT SEAT SLIDE ADJUSTER REMOVAL/INSTALLATION.)
6 | INSPECT POSITION MEMORY CONTROL MODULE CIRCUIT FOR OPEN CIRCUIT • Position memory control module and rear tilt motor connectors are disconnected. • Inspect for continuity between the following terminals (wiring harness-side): ― Rear tilt motor terminal D—Position memory control module terminal 4E ― Rear tilt motor terminal E—Position memory control module terminal 4F • Is there continuity? | Yes | Go to the next step.
No | Repair or replace the wiring harness for possible open circuit, then go to the next step.
7 | VERIFY TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Reconnect the negative battery cable. • Clear the DTC using the M-MDS. (See CLEARING DTC [POSITION MEMORY CONTROL SYSTEM].) • Switch the ignition to ON. • Perform the DTC inspection using the M-MDS. (See DTC INSPECTION [POSITION MEMORY CONTROL SYSTEM].) • Is the same DTC present? | Yes | Replace the front seat slide adjuster. (See FRONT SEAT SLIDE ADJUSTER REMOVAL/INSTALLATION.)
No | DTC troubleshooting completed.