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Home >> Infiniti >> 2010 >> G37 Base, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 268 (Power Control System) >> IPDM E/R (With I-Key) >> System >> Relay Control System >> RELAY CONTROL SYSTEM : Fail-Safe >> Can Communication Control
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Can Communication Control

WARNING: This page is about a different car, the 2011 Nissan Juke. However, it is still accessible from the selected car via links, so may be relevant.

When CAN communication with ECM and BCM is impossible, IPDM E/R performs fail-safe control. After CAN communication recovers normally, it also returns to normal control.

If No CAN Communication Is Available With ECM

FAIL-SAFE OPERATION CHART

Control part Fail-safe operation
Cooling fan
  • Transmits the pulse duty signal (PWM signal) 100% when the ignition switch is turned ON.
  • Transmits the pulse duty signal (PWM signal) 0% when the ignition switch is turned OFF.
A/C compressor A/C relay OFF
Alternator Outputs the power generation command signal (PWM signal) 0%

If No CAN Communication Is Available With BCM

FAIL-SAFE OPERATION CHART

Control part Fail-safe operation
Headlamp
  • Turns ON the headlamp low relay when the ignition switch is turned ON
  • Turns OFF the headlamp low relay when the ignition switch is turned OFF
  • Headlamp high relay OFF
  • Parking lamp
  • License plate lamp
  • Illumination
  • Tail lamp
  • Side marker lamp
  • Turns ON the tail lamp relay when the ignition switch is turned ON
  • Turns OFF the tail lamp relay when the ignition switch is turned OFF
Front wiper motor
  • The status just before activation of fail-safe control is maintained until the ignition switch is turned OFF while the front wiper is operating at LO or HI speed.
  • The wiper is operated at LO speed until the ignition switch is turned OFF if the fail-safe control is activated while the front wiper is set in the INT mode and the front wiper motor is operating.
  • Returns automatically wiper to stop position when ignition switch is turned ON if fail-safe control is activated while front wiper motor is operated and wiper stop in the other position than stop position.
  • The status is held at service position if the fail-safe control is activated while the service position function is operating.
Front fog lamp Front fog lamp relay OFF
Rear window defogger Rear window defogger relay OFF
Horn Horn OFF
Ignition relay The status just before activation of fail-safe is maintained.
Starter motor Starter control relay OFF
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