LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Nissan-Datsun >> 2004 >> Sentra SE-R >> Repair and Diagnosis >> External Pages >> Different car >> Section 1492 (Driver Information System) >> Rear Sonar System >> Symptom Chart
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Symptom Chart

WARNING: This page is about a different car, the 2005 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.
PROBLEM SYMPTOM TABLE - REAR SONAR SYSTEM

Symptom Repair order
When the rear sonar system OFF switch is OFF, the indicator lamp does not light and the buzzer does not sound.
  1. Check rear sonar system OFF switch for malfunction. Refer to "REAR SONAR SYSTEM OFF SWITCH ".
  2. Check rear sonar system OFF switch ground circuit.
  3. Check harness and connections between rear sonar system OFF switch and sonar control unit.
  4. Replace sonar control unit. Refer to "SONAR CONTROL UNIT ".
When the rear sonar system OFF switch is OFF, the indicator lamp does not light but buzzer sounds.
  1. Check rear sonar system OFF indicator for malfunction. Refer to "REAR SONAR SYSTEM OFF INDICATOR ".
  2. Check harness and connections between rear sonar system OFF indicator and sonar control unit.
  3. Replace sonar control unit. Refer to "SONAR CONTROL UNIT ".
When the rear sonar system OFF switch is OFF, the sonar buzzer does not sound but indicator lamp lights up.
  1. Check sonar buzzer. Refer to "SONAR BUZZER ".
  2. Check harness and connections between sonar buzzer and sonar control unit.
  3. Replace sonar control unit. Refer to: "SONAR CONTROL UNIT ".
When rear sonar system OFF switch is OFF, the rear sonar system OFF indicator lamp lights up and the sonar buzzer sounds intermittently (for about 4 seconds).
  1. Check harness between rear sonar sensors and sonar control unit for an open condition.
  2. Check rear sonar sensors for malfunction.
  3. Replace sonar control unit. Refer to "SONAR CONTROL UNIT ".
The rear sonar system operates with the rear sonar system OFF switch ON.
  1. Check rear sonar system OFF switch for malfunction. Refer to "REAR SONAR SYSTEM OFF SWITCH ".
  2. Check rear sonar system OFF switch ground circuit.
  3. Check harness and connections between rear sonar system OFF switch and sonar control unit.
  4. Replace sonar control unit. Refer to "SONAR CONTROL UNIT ".
When the selector lever is in the R position and the rear sonar system OFF switch is OFF, the sonar system does not operate.
  1. Check for PNP switch failure. Refer to "" for 4-speed A/T or "Diagnostic Procedure" for 5-speed A/T.
  2. Check harness and connections between sonar control unit and PNP/reverse lamp circuits.
  3. Replace sonar control unit. Refer to "SONAR CONTROL UNIT ".
When the rear sonar system OFF switch is OFF, the indicator lamp lights up and buzzer sounds although there is no obstacle within the detection range.
  1. Check for adhesion of snow, mud, or other foreign objects to rear sonar sensors; dew condensation; etc. Refer to "Pre-diagnosis Inspection ".
  2. Check harness and connections between rear sonar sensors and sonar control unit.
  3. Check rear sonar sensors for malfunction.
  4. Replace sonar control unit. Refer to "SONAR CONTROL UNIT ".
The rear sonar sensors do not operate according to the distance between each sensor and the obstacle. (There is a large error in the obstacle detection distance.)
  1. Check rear sonar sensors for malfunction.
  2. Replace sonar control unit. Refer to "SONAR CONTROL UNIT ".
scientia non olet · About LEMON Manuals