Diagnostic Procedure

DTC B1B87:13 (POSITION MEMORY CONTROL MODULE) DIAGNOSTIC PROCEDURE

Step	Inspection		Action
1	INSPECT LIFT MOTOR AND POSITION SENSOR CONNECTOR Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .) Disconnect the lift motor and position sensor connector. Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. Is the connector normal?	Yes	Go to the next step.
1		No	Repair or replace the connector, then go to Step 9.
2	INSPECT POSITION MEMORY CONTROL MODULE CONNECTOR Disconnect the position memory control module connector. Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. Is the connector normal?	Yes	Go to the next step.
2		No	Repair or replace the connector, then go to Step 9.
3	INSPECT LIFT MOTOR AND POSITION SENSOR CIRCUIT FOR SHORT TO GROUND Verify that the lift motor and position sensor and position memory control module connectors are disconnected. Inspect for continuity between the following terminals (wiring harness-side) and body ground: Lift motor and position sensor terminal A Lift motor and position sensor terminal B Lift motor and position sensor terminal C Lift motor and position sensor terminal D Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: Position memory control module terminal 3E-Lift motor and position sensor terminal A Position memory control module terminal 3F-Lift motor and position sensor terminal B Position memory control module terminal 3M-Lift motor and position sensor terminal C Position memory control module terminal 3N-Lift motor and position sensor terminal D If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has a short to ground. Go to Step 9.
3		No	Go to the next step.
4	INSPECT LIFT MOTOR AND POSITION SENSOR CIRCUIT FOR SHORT TO POWER SUPPLY Verify that the lift motor and position sensor and position memory control module connectors are disconnected. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .) Switch the ignition ON (engine off or on). Measure the voltage at the following terminals (wiring harness-side): Lift motor and position sensor terminal A Lift motor and position sensor terminal B Lift motor and position sensor terminal C Lift motor and position sensor terminal D Is the voltage 0 V?	Yes	Go to the next step.
4		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: Position memory control module terminal 3E-Lift motor and position sensor terminal A Position memory control module terminal 3F-Lift motor and position sensor terminal B Position memory control module terminal 3M-Lift motor and position sensor terminal C Position memory control module terminal 3N-Lift motor and position sensor terminal D If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has a short to power supply. Go to Step 9.
5	INSPECT LIFT MOTOR AND POSITION SENSOR CIRCUIT FOR OPEN CIRCUIT Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .) Verify that the lift motor and position sensor and position memory control module connectors are disconnected. Inspect for continuity between the following terminals (wiring harness-side): Position memory control module terminal 3E-Lift motor and position sensor terminal A Position memory control module terminal 3F-Lift motor and position sensor terminal B Position memory control module terminal 3M-Lift motor and position sensor terminal C Position memory control module terminal 3N-Lift motor and position sensor terminal D Is there continuity?	Yes	Go to the next step.
5		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: Position memory control module terminal 3E-Lift motor and position sensor terminal A Position memory control module terminal 3F-Lift motor and position sensor terminal B Position memory control module terminal 3M-Lift motor and position sensor terminal C Position memory control module terminal 3N-Lift motor and position sensor terminal D If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has an open circuit. Go to Step 9.
6	INSPECT LIFT MOTOR Inspect the lift motor. (See LIFT MOTOR INSPECTION .) Is the lift motor normal?	Yes	Go to the next step.
6		No	Replace the front seat, then go to Step 9. (See FRONT SEAT REMOVAL/INSTALLATION .)
7	INSPECT POSITION MEMORY CONTROL MODULE Inspect the position memory control module. (See POSITION MEMORY CONTROL MODULE INSPECTION .) Is the position memory control module normal?	Yes	Go to the next step.
7		No	Replace the position memory control module, then go to Step 9. (See POSITION MEMORY CONTROL MODULE REMOVAL/INSTALLATION .)
8	VERIFY IF MALFUNCTIONING LOCATION IS LIFT POSITION SENSOR DEPENDING ON REPEATABILITY Always reconnect all disconnected connectors. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .) Clear the DTC for the position memory control module using the M-MDS. (See CLEARING DTC (POSITION MEMORY CONTROL MODULE) .) Operate the lift switch of the driver's side power seat switch for 5 s or more. Retrieve the position memory control module DTCs using the M-MDS. (See DTC INSPECTION (POSITION MEMORY CONTROL MODULE) .) Is the same Pending DTC present?	Yes	Replace the front seat, then go to the next step. (See FRONT SEAT REMOVAL/INSTALLATION .)
8		No	Go to Step 10.
9	VERIFY THAT REPAIRS HAVE BEEN COMPLETED Always reconnect all disconnected connectors. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .) Clear the DTC for the position memory control module using the M-MDS. (See CLEARING DTC (POSITION MEMORY CONTROL MODULE) .) Operate the lift switch of the driver's side power seat switch for 5 s or more. Retrieve the position memory control module DTCs using the M-MDS. (See DTC INSPECTION (POSITION MEMORY CONTROL MODULE) .) Is the same Pending DTC present?	Yes	Repeat the inspection from Step 1. If the malfunction recurs, replace the position memory control module. (See POSITION MEMORY CONTROL MODULE REMOVAL/INSTALLATION .) Go to the next step.
9		No	Go to the next step.
10	VERIFY IF OTHER DTCs DISPLAYED Are any other DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE (POSITION MEMORY CONTROL MODULE) .)
10		No	DTC troubleshooting completed.