Inspection Procedure

CHECK FOR DTC

DTC output area check

Using the Techstream, determine the area that output the DTC.

Result

RESULT CHART

Result	Proceed to
B2654 output from driver seat ECU	A
B2654 output from passenger seat ECU	B

B: Go to step 9

A: Go to Next Step

PERFORM ACTIVE TEST BY TECHSTREAM (POWER SEAT MOTOR FUNCTION)

Select the Active Test, use the Techstream to generate a control command, and then check the power seat motor function.

Driver Seat

DRIVER SEAT ACTIVE TEST REFERENCE CHART

Tester Display	Test Part	Control Range
Headrest Operation	Seat headrest operation	UP/DOWN

OK: Motor operates normally

NG: Go to step 7

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH - FRONT HEADREST MOTOR LH AND BODY GROUND)

Disconnect the e46 switch connector.
Disconnect the e53 motor connector.

Measure the resistance according to the values in the table below.

Standard Resistance

RESISTANCE SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
e46-8 (PVCC) - e53-2 (VCC)	Always	Below 1 Ω
e46-21 (SSRH) - e53-4 (O/P)	Always	Below 1 Ω
e46-18 (SGND) - e53-3 (GND)	Always	Below 1 Ω
e46-8 (PVCC) - Body ground	Always	10 kΩ or higher
e46-21 (SSRH) - Body ground	Always	10 kΩ or higher
e46-18 (SGND) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 1: Identifying e46 Power Seat Switch And e53 Motor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK FRONT SEAT HEADREST ADJUSTER SUB-ASSEMBLY (POSITION CONTROL SENSOR)

Disconnect the e53 motor connector.

Measure the voltage according to the values in the table below.

Standard Voltage

VOLTAGE SPECIFIED CONDITIONS

Tester Connection	Switch Condition	Specified Condition
e53-2 (VCC) - e53-3 (GND)	Headrest switch signal ON	7.2 to 8.8 V

Fig 2: Identifying e53 Motor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE FRONT POWER SEAT SWITCH LH (See REMOVAL )

OK: Go to Next Step

CHECK FRONT SEAT HEADREST ADJUSTER SUB-ASSEMBLY (POSITION CONTROL SENSOR)

Reconnect the e53 motor connector.

Measure the voltage according to the value in the table below.

Standard Voltage

VOLTAGE SPECIFIED CONDITIONS

Tester Connection	Switch Condition	Specified Condition
e53-4 (O/P) - Body ground	Headrest switch signal ON	0 to 8V

Fig 3: Identifying e53 Motor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE FRONT SEAT HEADREST ADJUSTER SUB-ASSEMBLY (See REMOVAL )

OK: Go to Next Step

CHECK FOR DTC
1. Clear the DTC (see DTC CHECK / CLEAR ).
2. Recheck the DTC.
  OK: DTC B2654 is not output.
NG: REPLACE FRONT POWER SEAT SWITCH LH (See REMOVAL )

OK: END (SYSTEM RETURNS TO NORMAL)

CHECK FRONT SEAT HEADREST ADJUSTER SUB-ASSEMBLY (POWER SEAT MOTOR)

Check operation of the power seat motor (headrest motor).

Check if the seat adjuster moves smoothly when the battery is connected to the headrest motor connector terminals.

HEADREST MOTOR ACTIVE TEST REFERENCE CHART

Measurement Condition	Operational Direction
Battery positive (+) → 1 Battery negative (-) → 5	Upward
Battery positive (+) → 5 Battery negative (-) → 1	Downward

Fig 4: Identifying Power Seat Motor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE FRONT SEAT HEADREST ADJUSTER SUB-ASSEMBLY (See REMOVAL )

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH - FRONT HEADREST MOTOR LH)

Disconnect the e45 switch connector.
Disconnect the e53 motor connector.

Measure the resistance according to the values in the table below.

Standard Resistance

RESISTANCE SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
e45-11 (H+) - e53-1 (UP)	Always	Below 1 Ω
e45-8 (H-) - e53-5 (DOWN)	Always	Below 1 Ω

Fig 5: Identifying e45 Power Seat Switch And e53 Motor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE FRONT POWER SEAT SWITCH LH (See REMOVAL )

CHECK VEHICLE

Check the type of headrest.

RESULT CHART

Result	Proceed to
w/ Folding headrest	A
w/ Normal headrest	B

B: Go to step 17

A: Go to Next Step

PERFORM ACTIVE TEST BY TECHSTREAM (POWER SEAT MOTOR FUNCTION)

Select the Active Test, use the Techstream to generate a control command, and then check the power seat motor function.

Passenger Seat

PASSENGER SEAT ACTIVE TEST REFERENCE CHART

Tester Display	Test Part	Control Range
Headrest Operation	Seat headrest operation	UP/DOWN

OK: Motor operates normally

NG: Go to step 15

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH RH - FRONT HEADREST POSITION SENSOR RH AND BODY GROUND)

Disconnect the e20 switch connector.
Disconnect the e23 sensor connector.

Measure the resistance according to the values in the table below.

Standard Resistance

RESISTANCE SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
e20-8 (PVCC) - e23-3 (VCC)	Always	Below 1 Ω
e20-21 (SSRH) - e23-1 (O/P)	Always	Below 1 Ω
e20-18 (SGND) - e23-2 (GND)	Always	Below 1 Ω
e20-8 (PVCC) - Body ground	Always	10 kΩ or higher
e20-21 (SSRH) - Body ground	Always	10 kΩ or higher
e20-18 (SGND) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 6: Identifying e20 Power Seat Switch And e23 Sensor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK FRONT SEAT HEADREST ADJUSTER (POSITION CONTROL SENSOR)

Disconnect the e23 sensor connector.

Measure the voltage according to the values in the table below.

Standard Voltage

VOLTAGE SPECIFIED CONDITIONS

Tester Connection	Switch Condition	Specified Condition
e23-3 (VCC) - e23-2 (GND)	Headrest switch signal ON	7.2 to 8.8 V

Fig 7: Identifying e23 Sensor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE FRONT POWER SEAT SWITCH RH (See REMOVAL )

OK: Go to Next Step

CHECK FRONT SEAT HEADREST ADJUSTER (POSITION CONTROL SENSOR)

Reconnect the e23 sensor connector.

Measure the voltage according to the value in the table below.

Standard Voltage

VOLTAGE SPECIFIED CONDITIONS

Tester Connection	Switch Condition	Specified Condition
e23-1 (O/P) - Body ground	Headrest switch signal ON	0 to 8V

Fig 8: Identifying e23 Sensor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE FRONT SEAT HEADREST ADJUSTER (See REMOVAL )

OK: Go to Next Step

CHECK FOR DTC
1. Clear the DTC (see DTC CHECK / CLEAR ).
2. Recheck the DTC.
  OK: DTC B2654 is not output.
NG: REPLACE FRONT POWER SEAT SWITCH RH (See REMOVAL )

OK: END (SYSTEM RETURNS TO NORMAL)

CHECK POWER SEAT MOTOR ASSEMBLY

Check operation of the power seat motor (headrest motor).

Check if the seat adjuster moves smoothly when the battery is connected to the headrest motor connector terminals.

HEADREST MOTOR OPERATION CHART

Measurement Condition	Operational Direction
Battery positive (+) → 1 Battery negative (-) → 2	Upward
Battery positive (+) → 2 Battery negative (-) → 1	Downward

Fig 9: Identifying Power Seat Motor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE POWER SEAT MOTOR ASSEMBLY (See REMOVAL )

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH RH - POWER SEAT MOTOR)

Disconnect the e18 switch connector.
Disconnect the e26 motor connector.

Measure the resistance according to the values in the table below.

Standard Resistance

RESISTANCE SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
e18-11 (H+) - e26-1	Always	Below 1 Ω
e18-8 (H-) - e26-2	Always	Below 1 Ω

Fig 10: Identifying e18 Power Seat Switch And e26 Motor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE FRONT POWER SEAT SWITCH RH (See REMOVAL )

PERFORM ACTIVE TEST BY TECHSTREAM (POWER SEAT MOTOR FUNCTION)

Select the Active Test, use the Techstream to generate a control command, and then check the power seat motor function.

Passenger Seat

PASSENGER SEAT ACTIVE TEST REFERENCE CHART

Tester Display	Test Part	Control Range
Headrest Operation	Seat headrest operation	UP/DOWN

OK: Motor operates normally

NG: Go to step 22

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH RH - FRONT HEADREST MOTOR RH AND BODY GROUND)

Disconnect the e20 switch connector.
Disconnect the e25 motor connector.

Measure the resistance according to the values in the table below.

Standard Resistance

RESISTANCE SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
e20-8 (PVCC) - e25-2 (VCC)	Always	Below 1 Ω
e20-21 (SSRH) - e25-4 (O/P)	Always	Below 1 Ω
e20-18 (SGND) - e25-3 (GND)	Always	Below 1 Ω
e20-8 (PVCC) - Body ground	Always	10 kΩ or higher
e20-21 (SSRH) - Body ground	Always	10 kΩ or higher
e20-18 (SGND) - Body ground	Always	10 kΩ or higher

Fig 11: Identifying e20 Power Seat Switch And e25 Motor Connector Terminals

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

CHECK FRONT SEAT HEADREST ADJUSTER SUB-ASSEMBLY (POSITION CONTROL SENSOR)

Disconnect the e25 sensor connector.

Measure the voltage according to the values in the table below.

Standard Voltage

VOLTAGE SPECIFIED CONDITIONS

Tester Connection	Switch Condition	Specified Condition
e25-2 (VCC) - e25-3 (GND)	Headrest switch signal ON	7.2 to 8.8 V V

Fig 12: Identifying e25 Sensor Connector Terminals

NG: REPLACE FRONT POWER SEAT SWITCH RH (See REMOVAL )

OK: Go to Next Step

CHECK FRONT SEAT HEADREST ADJUSTER SUB-ASSEMBLY (POSITION CONTROL SENSOR)

Reconnect the e25 sensor connector.

Measure the voltage according to the value in the table below.

Standard Voltage

VOLTAGE SPECIFIED CONDITIONS

Tester Connection	Switch Condition	Specified Condition
e25 (O/P) - Body ground	Headrest switch signal ON	0 to 8V

Fig 13: Identifying e25 Sensor Connector Terminals

NG: REPLACE FRONT SEAT HEADREST ADJUSTER SUB-ASSEMBLY (See REMOVAL )

OK: Go to Next Step

CHECK FOR DTC
1. Clear the DTC (see DTC CHECK / CLEAR ).
2. Recheck the DTC.
  OK: DTC B2654 is not output.
NG: REPLACE FRONT POWER SEAT SWITCH RH (See REMOVAL )

OK: END (SYSTEM RETURNS TO NORMAL)

CHECK FRONT SEAT HEADREST ADJUSTER SUB-ASSEMBLY (POWER SEAT MOTOR)

Check operation of the power seat motor (headrest motor).

Check if the seat adjuster moves smoothly when the battery is connected to the headrest motor connector terminals.

HEADREST MOTOR OPERATION CHART

Measurement Condition	Operational Direction
Battery positive (+) → 1 Battery negative (-) → 5	Upward
Battery positive (+) → 5 Battery negative (-) → 1	Downward

Fig 14: Identifying Power Seat Motor Connector Terminals

NG: REPLACE FRONT SEAT HEADREST ADJUSTER SUB-ASSEMBLY (See REMOVAL )

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH RH - FRONT HEADREST MOTOR RH)

Disconnect the e18 switch connector.
Disconnect the e25 motor connector.

Measure the resistance according to the values in the table below.

Standard Resistance

RESISTANCE SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
e18-11 (H+) - e25-1 (UP)	Always	Below 1 Ω
e18-8 (H-) - e25-5 (DOWN)	Always	Below 1 Ω

Fig 15: Identifying e18 Power Seat Switch And e25 Motor Connector Terminals

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE FRONT POWER SEAT SWITCH RH (See REMOVAL )