Nissan Altima 2007-2012 Service Manual: B terminal circuit

Description

The “B” terminal is constantly supplied with battery power.

Diagnosis Procedure

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 depleted.

1.CHECK TERMINAL B POWER SUPPLY VOLTAGE

1. Turn ignition switch OFF.

2. Make sure that starter motor connector F27 terminal B connection is clean and tight.

3. Check voltage between starter motor connector F27 terminal B and ground.

Is there battery voltage present? YES >> GO TO 2

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

2.CHECK BATTERY CABLE (VOLTAGE DROP TEST)

1. Shift CVT selector lever to “P” or “N” position. (CVT models) Press and hold the clutch pedal fully with the control lever in neutral. (M/T models) 2. Check voltage between battery positive terminal and starter motor connector F27 terminal B while cranking the engine.

Is the voltage drop less than 0.5V? YES >> GO TO 3

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

3.CHECK GROUND CIRCUIT STATUS (VOLTAGE DROP TEST)

1. Shift CVT selector lever to “P” or “N” position. (CVT models) Press and hold the clutch pedal fully with the control lever in neutral. (M/T models) 2. Check voltage between battery positive terminal and starter motor connector F27 terminal B while cranking the engine.

Is the voltage drop less than 0.5V? YES >> GO TO 3

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

3.CHECK GROUND CIRCUIT STATUS (VOLTAGE DROP TEST)

1. Shift CVT selector lever to “P” or “N” position. (CVT models) Press and hold the clutch pedal fully with the control lever in neutral. (M/T models) 2. Check voltage between starter motor case and battery negative terminal while cranking the engine.

Is the voltage drop less than 0.2V? YES >> Terminal B circuit is OK. Further inspection necessary.

Refer to STR-29, "Work Flow".

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

    S connector circuit
    Description The starter motor magnetic switch is supplied with power when the ignition switch is turned to the START position while the selector lever is in the P or N position (CVT models) or th ...

    Other materials:

    Sunroof does not operate properly
    Diagnosis Procedure 1. CHECK BCM POWER SUPPLY AND GROUND CIRCUIT Check BCM power supply and ground circuit. Refer to BCS-42, "Diagnosis Procedure". >> GO TO 2 2. CHECK SUNROOF MOTOR ASSEMBLY POWER SUPPLY AND GROUND CIRCUIT Check sunroof motor assembly power supply and grou ...

    Water pump
    Removal and Installation 1. Water pump 2. O-rings WARNING: Never remove the radiator cap when the engine is hot. Serious burns could occur from high pressure coolant escaping from the radiator. CAUTION: • When removing water pump assembly, be careful not to get coolant on drive belt. ...

    Break-in schedule
    CAUTION During the first 1,200 miles (2,000 km), follow these recommendations to obtain maximum engine performance and ensure the future reliability and economy of your new vehicle. Failure to follow these recommendations may result in shortened engine life and reduced engine performance. & ...