LDW Switch Circuit Inspection

CHECK OPERATION OF LDW SYSTEM ON INDICATOR
1. Turn ignition switch ON.
2. Check LDW system ON indicator operation when LDW switch is ON/OFF.
OK or NG

OK : INSPECTION END

NG : GO TO 2.
CHECK LDW SWITCH SIGNAL INPUT
Check voltage between LDW camera unit harness connector R9 terminal 9 and ground.

9 - Ground

When LDW switch is pressed : Approx. 0 V

When LDW switch is released : Approx. 5 V

OK or NG

OK : GO TO 6.

NG : GO TO 3.

Fig 1: Identifying Voltage Between LDW Camera Unit Harness Connector R9 Terminal And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK LDW SWITCH GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect LDW switch connector.
3. Check continuity between LDW switch connector M96 terminal 6 and ground.
  6 - Ground : Continuity should exist.
OK or NG

OK : GO TO 4.

NG : Repair harness or connector.

Fig 2: Identifying Continuity Between LDW Switch Connector M96 Terminal 6 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK LDW SWITCH SIGNAL INPUT CIRCUIT
1. Disconnect LDW camera unit connector.
2. Check continuity between LDW camera unit harness connector R9 terminal 9 and LDW switch harness connector M96 terminal 7.
  9 - 7 : Continuity should exist.
3. Check continuity between LDW camera unit harness connector R9 terminal 9 and ground.
  9 - Ground : Continuity should not exist.
OK or NG

OK : GO TO 5.

NG : Repair harness or connector.

Fig 3: Identifying Continuity Between LDW Camera Unit Harness Connector R9 Terminal 9 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK LDW SWITCH
Check LDW switch. Refer to

OK or NG

OK : Replace LDW camera unit.

NG : Replace LDW switch.
CHECK OPERATION OF LDW SYSTEM ON INDICATOR
Check LDW system ON indicator operation "SYSTEM ON LAMP DRIVE" in "ACTIVE TEST" mode with CONSULT-II.

"SYSTEM ON LAMP DRIVE"

Touch "ON" : LDW system ON indicator illuminates.

Touch "OFF" : LDW system ON indicator turns OFF.

NOTE: Perform "SYSTEM ON LAMP DRIVE" when LDW system ON indicator turns OFF.

OK or NG

OK : Replace LDW camera unit.

NG : GO TO 7.

Fig 4: Displaying Active Test
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK LDW SYSTEM ON INDICATOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect LDW switch connector.
3. Turn ignition switch ON.
4. Check voltage between LDW switch harness connector M96 terminal 3 and ground.
  3 - Ground : Battery voltage
OK or NG

OK : GO TO 8.

NG : Check harness between fuse and LDW switch.

Fig 5: Identifying Voltage Between LDW Switch Harness Connector M96 Terminal 3 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK LDW SYSTEM ON INDICATOR SIGNAL CIRCUIT
1. Disconnect LDW camera unit connector.
2. Check continuity between LDW camera unit harness connector R9 terminal 4 and LDW switch harness connector M96 terminal 2.
  4 - 2 : Continuity should exist.
3. Check continuity between LDW camera unit harness connector R9 terminal 4 and ground.
  4 - Ground : Continuity should not exist.
OK or NG

OK : GO TO 9.

NG : Repair harness or connector.

Fig 6: Identifying Continuity Between LDW Camera Unit Harness Connector R9 Terminal 4 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK LDW SYSTEM ON INDICATOR
1. Connect LDW switch connector.
2. Turn ignition switch ON.
3. Apply ground to LDW switch terminal 2.
4. Check condition of the LDW system ON indicator.
  2 - Ground : LDW system ON indicator should illuminate.
OK or NG

OK : Replace LDW camera unit.

NG : Replace LDW switch.

Fig 7: Identifying LDW System On Indicator
Courtesy of NISSAN MOTOR CO., U.S.A.