2009 Infiniti QX56 AWDFACTORY OEM SERVICE PROCEDURE

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.
IPDM E/R INTEGRATED RELAYS REFERENCE

Control relay Input/output Transmit unit Control part Reference
Front fog lamp relay Front fog lamp request signal BCM (CAN) Front fog lamps FRONT FOG LAMP
  • Headlamp high relay
  • Headlamp low relay
  • High beam request signal
  • Low beam request signal
 BCM (CAN)
  • Headlamp high
  • Headlamp low
 HEADLAMP
HEADLAMP
Tail lamp relay Position light request signal BCM (CAN)
  • Parking lamps
  • License plate lamps
  • Tail lamps
  • Trailer tow relay
  • Illumination system
 PARKING, LICENSE PLATE AND TAIL LAMPS
  • Front wiper relay
  • Front wiper high relay
 Front wiper request signal BCM (CAN) Front wiper motor FRONT WIPER AND WASHER SYSTEM
Rear window defogger relay Rear window defogger request signal BCM (CAN) Rear window defogger REAR WIPER AND WASHER SYSTEM
A/C relay A/C request signal
  • BCM (CAN)
  • ECM (CAN)
 A/C compressor DIAGNOSIS SYSTEM (HVAC)
Starter relay Ignition switch START signal TCM Starter motor FUNCTION DIAGNOSIS
Cooling fan relay Cooling fan request signal ECM (CAN) Cooling fan relay COOLING FAN CONTROL
Heated mirror relay Heated mirror request signal BCM (CAN) Door mirrors FUNCTION DIAGNOSIS
ECM relay ECM relay control signal ECM (CAN) ECM relay FUNCTION DIAGNOSIS
Throttle control motor relay Throttle control motor control signal ECM (CAN) Throttle control motor relay MULTIPORT FUEL INJECTION SYSTEM
Fuel pump relay Fuel pump request signal ECM (CAN) Fuel pump MULTIPORT FUEL INJECTION SYSTEM
Ignition relay Ignition switch ON signal Ignition switch Ignition relay ELECTRIC IGNITION SYSTEM
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.