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Home >> Nissan-Datsun >> 2012 >> Quest SL >> Repair and Diagnosis >> Electrical >> Body Electrical >> Power Control System >> IPDM E/R >> System Description >> System >> Relay Control System System Diagram >> RELAY CONTROL SYSTEM: System Description
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RELAY CONTROL SYSTEM: System Description

IPDM E/R activates the internal control circuit to perform the relay ON-OFF control according to the input signals from various sensors and the request signals received from control units via CAN communication.

CAUTION: To prevent damage to the parts, IPDM E/R integrated relays cannot be removed.
Control relay Input/output Transmit unit Control part Refer to
Headlamp low relay Low beam request signal BCM (CAN) Headlamp (LO)
Headlamp high relay High beam request signal BCM (CAN) Headlamp (HI)
Front fog lamp relay Front fog light request signal BCM (CAN) Front fog lamp
Tail lamp relay Position light request signal BCM (CAN)
  • Parking lamp
  • license plate lamp
  • Tail lamp
  • Side marker lamp
Illumination ILLUMINATION CONTROL SYSTEM: SYSTEM DESCRIPTION
  • Front wiper relay
  • Front wiper high relay
Front wiper request signal BCM (CAN) Front wiper motor SYSTEM
Front wiper stop position signal Front wiper motor
Horn relay
  • Theft warning horn request signal
  • Horn reminder signal
BCM (CAN)
  • Horn (high)
  • Horn (low)
VEHICLE SECURITY SYSTEM: SYSTEM DIAGRAM
  • Starter relay(1)
  • Starter control relay
Starter control relay signal BCM (CAN) Starter motor SYSTEM DESCRIPTION
Starter relay control signal TCM
Starter motor relay cut off signal ECM (CAN) STARTER MOTOR DRIVE CONTROL: SYSTEM DIAGRAM
A/C relay A/C compressor request signal ECM (CAN) A/C compressor (magnet clutch)
  • Cooling fan relay-1
  • Cooling fan relay-2
  • Cooling fan relay-3
Cooling fan speed request signal ECM (CAN)
  • Cooling fan motor-1
  • Cooling fan motor-2
COAST OPERATION
Ignition relay Ignition switch ON signal BCM (CAN) Each control unit, sensor, actuator and relay (ignition power supply) B2098 IGNITION RELAY ON STUCK 
Vehicle speed signal Combination meter (CAN)
Push-button ignition switch signal Push-button ignition switch
Daytime running light relay Daytime running light request signal BCM (CAN) Headlamp (HI)
(1) BCM controls the starter relay.