DTC 23: Swivel Pulse Abnormal: Procedure

1. Disconnect the Q9 power seat motor assembly (swivel motor) connector.
   Fig 1: Checking Q9 Power Seat Motor Assembly (Swivel Motor)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   Q9-1 (SMIN) - Body ground	No. 2 power seat switch assembly (egress switch) off → on	Below 1 V → 11 to 14 V
   Q9-4 (SMOT) - Body ground	No. 2 power seat switch assembly (ingress switch) off → on	Below 1 V → 11 to 14 V
   Q9-3 (SP+) - Body ground	No. 2 power seat switch assembly (ingress or egress switch) on (During seat swivel operation)	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Power Seat Motor Assembly (Swivel Motor))

3. Reconnect the power seat motor assembly (swivel motor) connector.

NG → See step   6 

OK: Go to next step 

1. Using an oscilloscope, check the waveform.
   Fig 2: Checking Power Seat Motor Assembly (Swivel Motor)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK

   Tester Connection	Switch Condition	Specified Condition
   Q3-22 (TRNP) - Body ground	No. 2 power seat switch assembly (ingress or egress switch) on (During seat swivel operation)	Pulse generation

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Position Control ECU Assembly)

NG → See step   3 

OK → See step   7 

1. Disconnect the Q3 position control ECU assembly connector.
2. Disconnect the Q9 power seat motor assembly (swivel motor) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Q3-22 (TRNP) - Q9-5 (SPOP)	Always	Below 1 Ω
   Q9-6 (SP-) - Body ground	Always	Below 1 Ω
   Q3-22 (TRNP) - Body ground	Always	10 kΩ or higher

4. Reconnect the power seat motor assembly (swivel motor) connector.
5. Reconnect the position control ECU assembly connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Temporarily replace the power seat motor assembly (swivel motor) with a new or normally functioning one. Refer to DISASSEMBLY .

NEXT: Go to next step 

1. Confirm that the auto access seat operates correctly. Refer to OPERATION CHECK .

   OK

   Auto access seat operates correctly.

NG → See step   8 

OK → END 

1. Disconnect the Q4 and Q2 position control ECU assembly connectors.
2. Disconnect the Q9 power seat motor assembly (swivel motor) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Q4-10 (TRNO) - Q9-1 (SMIN)	Always	Below 1 Ω
   Q4-11 (TRNI) - Q9-4 (SMOT)	Always	Below 1 Ω
   Q2-3 (SP12) - Q9-3 (SP+)	Always	Below 1 Ω
   Q4-10 (TRNO) - Body ground	Always	10 kΩ or higher
   Q4-11 (TRNI) - Body ground	Always	10 kΩ or higher
   Q2-3 (SP12) - Body ground	Always	10 kΩ or higher

4. Reconnect the power seat motor assembly (swivel motor) connector.
5. Reconnect the position control ECU assembly connectors.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   9