Seat Memory Switch Circuit Inspection

WARNING: This page is about a different car, the 2004 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FUNCTION
With CONSULT-II

With "SET SW, MEMORY SW1, MEMORY SW2" on the DATA MONITOR, operate the switch to check ON/OFF operation.

Fig 1: Checking Function
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: View Of Consult-II Screens
Courtesy of NISSAN MOTOR CO., U.S.A.

Without CONSULT-II

Carry out "switch monitor" in the self-diagnosis function, and operate "Setting switch, memory switch 1, memory switch 2" to check. Refer to SWITCH MONITOR .

OK or NG
1. OK: System is OK.
2. NG: GO TO 2.
CHECK SEAT MEMORY SWITCH
1. Turn ignition switch OFF
2. Disconnect seat memory switch connector.
3. Operate the setting switch and memory switch.
4. Check continuity between seat memory switch connector and body ground.
  
  Fig 3: Checking Seat Memory Switch (1 Of 2)
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 4: Checking Seat Memory Switch (2 Of 2)
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 3.
2. NG: Replace seat memory switch.
CHECK HARNESS CONTINUITY
1. Disconnect BCM connector.
2. Check continuity between BCM connector M4 terminals 39 (G), 43 (OR/L), 50 (P/L) and seat memory switch connector D3 terminals 1 (G), 2 (OR/L), 3 (P/L).
  
  Fig 5: Checking Harness Continuity
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  39 (G) - 1 (G): Continuity should exist.
  
  43 (OR/L) - 2 (OR/L): Continuity should exist.
  
  50 (P/L) - 3 (P/L): Continuity should exist.
3. Check continuity between BCM connector M4 terminals 39 (G), 43 (OR/L), 50 (P/L) and body ground.
  39 (G) - Ground: Continuity should not exist.
  
  43 (OR/L) - Ground: Continuity should not exist.
  
  50 (P/L) - Ground: Continuity should not exist.
OK or NG
1. OK: GO TO 4.
2. NG: Repair or replace harness between BCM and seat memory switch.
CHECK SEAT MEMORY SWITCH GROUND CIRCUIT
Check continuity at harness between seat memory switch D3 terminal 4 (B) and body ground.

4 (B) - Ground: Continuity should exist.

Fig 6: Checking Seat Memory Switch Ground Circuit
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK: Replace BCM
2. NG: Repair or replace harness between seat memory switch and body ground.