Check Lumbar Support Circuit

1. Turn ignition switch OFF.
2. Disconnect lumbar support switch connector.
3. Check voltage between lumbar support switch connector and ground.
   VOLTAGE SPECIFICATION
   
   

   Terminals			Voltage (V) (Approx.)
   (+)		(-)
   Lumbar support switch connector	Terminal
   B212	55	Ground	Battery voltage

OK or NG 

OK: GO TO 2.

NG: Repair or replace harness between fuse block (J/B) and lumbar support switch.

Fig 1: Checking Voltage Between Lumbar Support Switch Connector And Ground

Check continuity lumbar support switch connector.

Fig 2: Checking Continuity Lumbar Support Switch Connector

OK or NG 

OK: GO TO 3.

NG: Replace lumbar support switch.

1. Disconnect lumbar support motor connector.
2. Check continuity between lumbar support switch connector and lumbar support motor connector.
   CONTINUITY SPECIFICATION
   
   

   A		B		Continuity
   Lumbar support switch connector	Terminal	Lumbar support motor connector	Terminal
   B212	57	B211	57	Yes
   	58		58

3. Check continuity between lumbar support switch connector and ground.
   Fig 3: Checking Continuity Between Lumbar Support Switch Connector And Lumbar Support Motor Connector

   
   CONTINUITY SPECIFICATION
   
   

   A		Ground	Continuity
   Lumbar support switch connector	Terminal
   B212	57		No
   	58

OK or NG 

OK: GO TO 4.

NG: Repair or replace harness.

Check continuity between lumbar support switch connector and ground.

OK or NG 

OK: Check the condition of the harness and connector.

NG: Repair or replace harness between lumbar support switch and ground.

Fig 4: Checking Continuity Between Lumbar Support Switch Connector And Ground