LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Nissan-Datsun >> 2013 >> Maxima S >> Repair and Diagnosis (Single Page) >> Electrical >> Body Electrical >> Power Control System (IPDM/Er) >> System Description >> Relay Control System >> System Description
April 5, 2026: LEMON Manuals is launched! Read the announcement.

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: IPDM E/R integrated relays cannot be removed.
Control relay Input/output Transmit unit Control part Reference
Headlamp low relay Low beam request signal BCM (CAN) Headlamp low HEADLAMP (LO) CIRCUIT (xenon type) HEADLAMP (LO) CIRCUIT (halogen type)
Headlamp high relay High beam request signal BCM (CAN) Headlamp high HEADLAMP (HI) CIRCUIT (xenon type) HEADLAMP (HI) CIRCUIT (halogen type)
Front fog lamp relay (if equipped) Front fog light request signal BCM (CAN) Front fog lamp (if equipped) FRONT FOG LAMP CIRCUIT (xenon type) FRONT FOG LAMP CIRCUIT (halogen type)
Tail lamp relay Position light request signal BCM (CAN)
  • Parking lamp
  • Side marker lamp
  • License plate lamp
  • Tail lamp
  • Illuminations
PARKING LAMP CIRCUIT (xenon type) PARKING LAMP CIRCUIT (halogen type)
  • Front wiper relay
  • Front wiper high relay
Front wiper request signal BCM (CAN) Front wiper FRONT WIPER MOTOR LO CIRCUIT
Front wiper auto stop signal Front wiper motor
  • Starter relay(1)
  • Starter control relay
Starter control relay signal BCM (CAN) Starter motor SYSTEM DESCRIPTION ,
Starter relay control signal TCM
A/C relay A/C compressor request signal ECM (CAN) A/C compressor (magnet clutch) MAGNET CLUTCH (with color display) or MAGNET CLUTCH (with monochrome display)
Ignition relay - 1 Ignition switch ON signal BCM (CAN) Ignition relay - 1 SYSTEM DESCRIPTION
Vehicle speed signal Combination meter (CAN)
Push-button ignition switch Push-button ignition switch
Fuel pump relay Fuel pump request signal ECM Fuel level sensor unit and fuel pump (fuel pump) FUEL PUMP
ECM relay ECM relay control signal ECM ECM relay POWER SUPPLY AND GROUND CIRCUIT
Throttle control motor relay Throttle control motor relay signal ECM Throttle control motor relay P2100, P2103 THROTTLE CONTROL MOTOR RELAY
Cooling fan relay - 1 Cooling fan request signal ECM (CAN) Cooling fan relay - 1 COOLING FAN
(1) BCM controls the starter relay.