Question about 1997 Nissan Maxima

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First, I notice the speedometer and tac. are not functioning, Interior lights are dim, ac controls turned of aswellas cruise control shuts off. Not sure if its alternator or voltage reg. or what else it could be? Engine runs fine. Last night I drove in the dark until it completly shut down. Waited about 5min. Started right up, every thing functioned fine until I put it in drive and turned on head lights. Made it a few more blocks to friends drive way in the dark. Thanks for any info. Cal

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  • Nissan Master
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Check wire between the alternator and battery for good connection. (larger red wire connected to the alternator that is always "hot")You are correct in assuming that the alternator is not charging. Not sure if the regulator is integral with the alternator on yours but they should be replaced together as often failure of one weakens the other. Before replacing, have the system tested (including battery condition after being fully charged) check for voltage and load test).
A weak battery will cause the alternator to work overtime...if battery is bad, it can cause the new alternator to quickly fail again.

Posted on May 21, 2011

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This is very complex , first thing is have the vehicle checked for DTC'S - diagnostic trouble codes stored in the BCM , PCM !
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The engine control module (ECM)


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The clutch pedal position (CPP) sensor, if equipped with a manual transmission


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The throttle actuator control (TAC) motor


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The body control module (BCM) monitors the signal circuit of the cruise control switches, which are located on the steering wheel. The BCM relays the cruise control switch status to the engine control module (ECM) via the GMLAN serial data circuit. The ECM uses the status of the cruise control switch to determine when to capture and maintain the vehicle speed. The ECM monitors the vehicle speed signal circuit in order to determine the desired vehicle speed. The ECM uses the TAC motor in order to maintain the vehicle speed. For further information on the TAC system, refer to Throttle Actuator Control (TAC) System Description for the 2.2L engine or to Throttle Actuator Control (TAC) System Description for the 2.4L engine.
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The throttle actuator control (TAC) system delivers improved throttle response and greater reliability and eliminates the need for mechanical cable. The TAC system performs the following functions:
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Accelerator pedal position (APP) sensing


?€¢
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?€¢
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?€¢
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?€¢
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?€¢
The throttle body assembly


?€¢
The TAC module


?€¢
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1 Answer

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