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Nissan Sentra Service Manual: B terminal circuit

Nissan Sentra Service Manual / Engine / Starting system / DTC/circuit diagnosis / B terminal circuit

Description

Terminal “B” is constantly supplied with battery power.

Diagnosis Procedure

Regarding Wiring Diagram information, refer to STR-10, "Wiring Diagram" (with Intelligent Key system) or STR-15, "Wiring Diagram" (without Intelligent Key system).

CAUTION:

Perform diagnosis under the condition that the engine cannot start by the following procedure.

  1. Remove fuel pump fuse.

  2. Crank or start the engine (where possible) until the fuel pressure is released.

1.CHECK “B” TERMINAL CIRCUIT

  1. Turn ignition switch OFF
  2. Check that starter motor B” terminal connection is clean and tight.
  3. Check voltage between starter motor connector F27 and ground.

Is the inspection result normal?


Is the inspection result normal? YES >> GO TO 2.

NO >> Check harness between battery and starter motor for open circuit.

2.CHECK BATTERY CABLE CONNECTION STATUS (VOLTAGE DROP TEST)

  1. Shift selector lever to P (Park) or N (Neutral) position (CVT Models) or the clutch pedal is depressed (M/T Models).
  2. Check voltage between battery positive terminal and starter motor B terminal.

Is the inspection result normal?


Is the inspection result normal? YES >> GO TO 3.

NO >> Check harness between the battery and starter motor for continuity.

3.CHECK GROUND CIRCUIT STATUS (VOLTAGE DROP TEST)

  1. Shift selector lever to P (Pack) or N (Neutral) position (CVT Models) or the clutch pedal is depressed (M/T Models).
  2. Check voltage between starter motor case and battery negative terminal.

Is the inspection result normal?


Is the inspection result normal? YES >> “B” terminal circuit is OK. Further inspection is necessary. Refer to STR-20, "Work Flow (With GR8-1200 NI)" or STR-24, "Work Flow (Without GR8-1200 NI)".

NO >> Check the starter motor case to engine mounting for high resistance.

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