Symptom 5. 4LO Indicator Lamp Does Not Turn ON

WARNING: This page is about a different car, the 2003 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM: When 4WD shift switch is set from "4H" to "4LO" position, 4LO indicator lamp does not turn ON.

CHECK TRANSFER CONTROL UNIT POWER SUPPLY CIRCUIT

Fig 1: Identifying 4WD Shift Indicator Lamp Display
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: Locating 4WD Shift Switch
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 3: Identifying 4LO Indicator Lamp (Meter) Connection With Transfer Control Unit
Courtesy of NISSAN MOTOR CO., U.S.A.
1. Disconnect battery negative terminal (-), then transfer control unit connector.
2. Connect battery negative terminal (-) and turn ignition switch "ON" (with engine stopped).
3. Check voltage across transfer control unit body-side connector terminals 47, 16 and body ground.
  Voltage: Battery voltage
OK or NG
1. OK: GO TO 2.
2. NG:
  Check the following.
  - Continuity between battery and transfer control unit
  - Ignition switch (Refer to "POWER SUPPLY ROUTING ".)
  - No. 24 fuse (7.5A), No. 8 fuse (10A) and No. 18 fuse (10A)
CHECK TRANSFER CONTROL UNIT GROUND CIRCUIT
1. Turn ignition switch "OFF", and disconnect transfer control unit connector.
2. Check for continuity between transfer control unit body-side connector terminals 6, 45 and body ground.
  Continuity should exist.
OK or NG
1. OK: GO TO 3.
2. NG:
  Check the following.
  - Continuity between transfer control unit and body ground
CHECK 4LO INDICATOR LAMP CIRCUIT
Disconnect battery negative terminal (-) and check the following items:
1. Check condition of 4LO indicator lamp.
2. Check continuity between battery and 4LO indicator lamp.
3. Check continuity between 4LO indicator lamp and transfer control unit connector terminal 12.
4. Check condition of ATP switch.
5. Check condition of neutral-4LO switch.
6. Check continuity between neutral-4LO switch ground terminal 6 and body ground.
OK or NG
1. OK: GO TO 4.
2. NG: Check the following.
  - 4LO indicator lamp
  - Neutral-4LO switch Refer to "ATP SWITCH, NEUTRAL-4LO SWITCH AND WAIT DETECTION SWITCH ", "COMPONENT INSPECTION".
CHECK PROCEDURES FROM THE BEGINNING
Check again.

OK or NG
1. OK: INSPECTION END
2. NG:
  1. Perform transfer control unit input/output signal inspection. Refer to "TRANSFER CONTROL UNIT INSPECTION TABLE ", "TROUBLE DIAGNOSIS - GENERAL DESCRIPTION".
  2. If NG, recheck transfer control unit pin terminals for damage or loose connection with harness connector.