DTC B1B93:13 [POSITION MEMORY CONTROL SYSTEM]

id0902z8999000

DTC B1B93:13

Recliner motor speed/position sensor communication fault

DETECTION CONDITION

•  Position memory control module reads signal stop from position sensor 4 times when recliner motor energization current is normal

•  Position memory control module reads that recliner 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:

―  Recliner motor terminal D—Position memory control module terminal 4O

―  Recliner motor terminal C—Position memory control module terminal 4P

•  Recliner motor malfunction

•  Short to ground in wiring harness between the following terminals:

―  Recliner motor terminal A—Position memory control module terminal 4H

―  Recliner motor terminal E—Position memory control module terminal 4G

•  Position memory control module malfunction

DTC B1B93:13	Recliner motor speed/position sensor communication fault
DETECTION CONDITION	• Position memory control module reads signal stop from position sensor 4 times when recliner motor energization current is normal • Position memory control module reads that recliner 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: ― Recliner motor terminal D—Position memory control module terminal 4O ― Recliner motor terminal C—Position memory control module terminal 4P • Recliner motor malfunction • Short to ground in wiring harness between the following terminals: ― Recliner motor terminal A—Position memory control module terminal 4H ― Recliner motor terminal E—Position memory control module terminal 4G • Position memory control module malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	INSPECT RECLINER MOTOR CONNECTOR CONDITION • Turn the ignition switch to OFF position. • Disconnect the negative battery cable. • Disconnect recliner 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.
1		No	Go to the next step.
2	INSPECT POSITON SENSOR • Inspect the position sensor. (See RECLINER MOTOR INSPECTION.) • Is the position sensor normal?	Yes	Go to the next step.
2		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.
3		No	Go to the next step.
4	INSPECT POSITION MEMORY CONTROL MODULE CIRCUIT FOR OPEN CIRCUIT • Position memory control module and recliner motor connectors are disconnected. • Inspect for continuity between the following terminals (wiring harness-side): ― Recliner motor terminal D—Position memory control module terminal 4O ― Recliner motor terminal C—Position memory control module terminal 4P • Is there continuity?	Yes	Go to the next step.
4		No	Repair or replace the wiring harness for possible open circuit, then go to the next step.
5	INSPECT RECLINER MOTOR • Inspect the recliner motor. (See RECLINER MOTOR INSPECTION.) • Is the recliner motor normal?	Yes	Go to the next step.
5		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 recliner motor connectors are disconnected. • Inspect for continuity between the following terminals (wiring harness-side): ― Recliner motor terminal A—Position memory control module terminal 4H ― Recliner motor terminal E—Position memory control module terminal 4G • Is there continuity?	Yes	Go to the next step.
6		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.)
7		No	DTC troubleshooting completed.