21. Reclining Pulse Abnormal

SEAT: AUTO ACCESS SEAT SYSTEM: 21: Reclining Pulse Abnormal
21 - Reclining Pulse Abnormal

DESCRIPTION

When the power seat switch assembly (reclining switch) or No. 2 power seat switch assembly (reclining switch) have been operated, the position control ECU assembly outputs driving voltage to drive the rear seat with adjuster frame assembly LH (reclining motor). When the rear seat with adjuster frame assembly LH (reclining motor) is driven, its pulse sensor sends the seat position information via pulse signal to the position control ECU assembly. Based on this signal, the position control ECU assembly stores the seat reclining angular position.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* When there is a malfunction in the auto access seat, use independent operation mode to ingress the auto access seat. In this case, until the auto access seat has completed the ingress operation, do not disconnect the cable from the negative battery terminal.
* When there is a malfunction in the auto access seat, before beginning the troubleshooting procedure, first perform initialization Auto Access Seat System and verify the auto access seat operation. If the seat is still malfunctioning, perform the troubleshooting procedure.
* After inspecting and repairing the auto access seat, be sure to perform initialization Auto Access Seat System.
* After performing initialization, be sure to inspect the operation of the auto access seat Operation Check.

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY)

(a) Disconnect the R5 rear seat with adjuster frame assembly LH (reclining motor) connector.





(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





Text in Illustration





(c) Reconnect the rear seat with adjuster frame assembly LH (reclining motor) connector.

NG -- CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - RECLINING MOTOR)
OK -- Continue to next step.

2. INSPECT REAR SEAT WITH ADJUSTER FRAME ASSEMBLY LH (RECLINING MOTOR)

(a) Using an oscilloscope, check the waveform.





OK:





Text in Illustration





NG -- CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - RECLINING MOTOR)

OK -- REPLACE POSITION CONTROL ECU ASSEMBLY Disassembly

3. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - RECLINING MOTOR)

(a) Disconnect the Q3 position control ECU assembly connector.

(b) Disconnect the R5 rear seat with adjuster frame assembly LH (reclining motor) connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





(d) Reconnect the rear seat with adjuster frame assembly LH (reclining motor) connector.

(e) Reconnect the position control ECU assembly connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. REPLACE REAR SEAT WITH ADJUSTER FRAME ASSEMBLY LH (RECLINING MOTOR)

(a) Temporarily replace the rear seat with adjuster frame assembly (reclining motor) with a new or normally functioning one Disassembly.

NEXT -- Continue to next step.

5. CHECK OPERATION

(a) Confirm that the auto access seat operates correctly Operation Check.

OK:

Auto access seat operates correctly.

NG -- REPLACE POSITION CONTROL ECU ASSEMBLY Disassembly

OK -- END

6. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - RECLINING MOTOR)

(a) Disconnect the Q3 and Q2 position control ECU assembly connectors.

(b) Disconnect the R5 rear seat with adjuster frame assembly (reclining motor) connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





(d) Reconnect the rear seat with adjuster frame assembly (reclining motor) connector.

(e) Reconnect the position control ECU assembly connectors.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE POSITION CONTROL ECU ASSEMBLY Disassembly