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.
B - ground Battery voltage
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 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-3, "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 the ...
Other materials:
Self-diagnosis function
Diagnosis Description
SELF-DIAGNOSIS SYSTEM
The self-diagnosis system is built into the front air control to quickly
locate the cause of malfunctions.
SELF-DIAGNOSIS FUNCTION
The self-diagnosis system diagnoses sensors, door motors, blower motor, etc.
by system line. Refer to applicable
se ...
P0127 IAT sensor
Description
The intake air temperature sensor is built-into mass air flow sensor
(1). The sensor detects intake air temperature and transmits a signal
to the ECM.
The temperature sensing unit uses a thermistor which is sensitive to
the change in temperature. Electrical resistance of the ther ...
On-vehicle repair
POWER WINDOW MAIN SWITCH
Removal and Installation
REMOVAL
1. Remove the power window main switch finisher (2). Refer to
INT-34, "Removal and Installation".
2. Power window main switch (1) is removed from power window
main switch finisher (2) using a suitable tool (A).
CAUTION: ...