Can Communication Control

WARNING: This page is about a different car, the 2011 Nissan 370Z. 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

Control part	Fail-safe operation
Cooling fan	Outputs the pulse duty signal (PWM signal) 100% when the ignition switch is turned ON Outputs 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

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 lamps
Side maker lamp
License plate lamps
Illuminations
Tail lamps

Turns ON the tail lamp relay and the daytime running light relay⁽¹⁾ when the ignition switch is turned ON
Turns OFF the tail lamp relay and the daytime running light relay⁽¹⁾ when the ignition switch is turned OFF

Front wiper

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 failsafe control is activated while the front wiper is set in the AUTO mode and the front wiper motor is operating.

Horn

Horn relay OFF

Ignition relay

The status just before activation of fail-safe is maintained.

Starter motor

Starter control relay OFF

Steering lock unit⁽²⁾

Steering lock relay OFF

⁽¹⁾	With daytime running light system

⁽²⁾	For models with steering lock unit