Home/Nissan/Altima/Nissan Altima L31 (2001-2004)/Repair manual/Headlights/Automatic Headlight Systems: Diagnosis
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Automatic Headlight Systems: Diagnosis Nissan Altima L31

Headlights 13 illustrations ~254 words

HOW TO PROCEED WITH TROUBLE DIAGNOSIS

  1. Confirm the malfunction symptom or customer complaint.
  2. Understand system description. See «DESCRIPTION & OPERATION»(ref-153106-S13978069712003031700000) .
  3. Conduct pre-inspection. See «INSPECTION BEFORE DIAGNOSIS»(ref-153106-S01455327482003031700000) .
  4. Find cause of malfunction by following the symptoms in trouble diagnosis and repair or replace as necessary. See «TROUBLE DIAGNOSIS BY SYMPTOM»(ref-153106-S08884690902003031700000) .
  5. Does automatic light system operate normally? If it operates normally, go to next step. If it does not operate normally, go to step 4.
  6. Inspection End.

BCM Power/Ground Circuit Inspection

For BCM power and ground circuit inspection (Scheme 2)- (Scheme 4).

Scheme 2

Scheme 2: BCM Power/Ground Circuit Inspection

Scheme 3

Scheme 3

Scheme 4

Scheme 4

ACTIVE TEST

Operation Procedure

  1. Touch "HEADLIGHT" on "SELECT TEST ITEM" screen.
  2. Touch "ACTIVE TEST" on "SELECT DIAG MODE" screen.
  3. Touch item to be tested and check operation of the selected item. (Scheme 5)
  4. During the operation check, touching "BACK" deactivates the operation.

Scheme 5

Scheme 5

TROUBLE DIAGNOSIS BY SYMPTOM

Note. For work support, see WORK SUPPORT . For light switch inspection, see LIGHT SWITCH INSPECTION . For auto light sensor system inspection, see AUTO LIGHT SENSOR SYSTEM INSPECTION . For CAN communication inspection using CONSULT-II, see CAN COMMUNICATION INSPECTION USING CONSULT-II .

For trouble diagnosis by symptom (Scheme 6)

Scheme 6

Scheme 6: TROUBLE DIAGNOSIS BY SYMPTOM

LIGHT SWITCH INSPECTION

For light switch inspection (Scheme 7)

Scheme 7

Scheme 7: LIGHT SWITCH INSPECTION

AUTO LIGHT SENSOR SYSTEM INSPECTION

Note. For connector symbol explanation, see HOW TO READ CONNECTOR SYMBOLS .

For auto light sensor system inspection (Scheme 8)- (Scheme 12).

Scheme 8

Scheme 8: AUTO LIGHT SENSOR SYSTEM INSPECTION

Scheme 9

Scheme 9

Scheme 10

Scheme 10

Scheme 11

Scheme 11

Scheme 12

Scheme 12

Scheme 13

Scheme 13: PIN VOLTAGE TESTS

Scheme 14

Scheme 14: HOW TO READ CONNECTOR SYMBOLS