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Nissan Sentra Service Manual: Both doors mirror defogger don’t operate but rear window defogger operates

Nissan Sentra Service Manual / Driver controls / Defogger / Symptom diagnosis / Both doors mirror defogger don’t operate but rear window defogger operates

Diagnosis procedure

Regarding Wiring Diagram information, refer to DEF-20, "Wiring Diagram".

1. Check door mirror defogger fuse

Check if the following fuse in fuse block (J/B) is blown.

Is the inspection result normal?


Is the inspection result normal? Yes >> go to 2.

No >> replace the blown fuse after repairing the affected circuit.

2. Check door mirror defogger power supply circuit

Check door mirror defogger power supply and ground circuit.

Refer to def-35, "component function check" (driver side) or def-37, "component function check" (passenger side).

Is the inspection result normal? Yes >> go to 3.

No >> repair or replace the malfunctioning parts.

3. Check both door mirror defogger

  1. Check door mirror lh. Refer to def-36, "component inspection".
  2. Check door mirror RH. Refer to DEF-38, "Component Inspection".

Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-39, "Intermittent Incident".

NO >> Repair or replace the malfunctioning parts.

Rear window defogger does not operate but both door mirror defoggers operate
Diagnosis procedure 1. Check rear window defogger power supply and ground circuit Check rear window defogger power supply and ground circuit. Refer to DEF-32, "Component Function Check" ...

Driver side door mirror defogger does not operate
Diagnosis procedure 1. Check door mirror defogger lh Check door mirror defogger LH. Refer to DEF-35, "Component Function Check". Is the inspection result normal? YES >> Refer ...

Other materials:

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A-bag branch line circuit
Diagnosis procedure Warning: Always observe the following items for preventing accidental activation. Before servicing, turn ignition switch off, disconnect battery negative terminal, and wait 3 minutes or more. (To discharge backup capacitor.) Never use unspecified tester or other me ...

P0604 ECM
DTC Logic DTC DETECTION LOGIC DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detecting condition Possible cause P0604 ECM [Internal control module random access memory (RAM) error] Malfunction in the internal RAM of ECM. ECM DTC CON ...

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