Nissan Versa Sedan. Instruction - part 608
PCS-18
< ECU DIAGNOSIS INFORMATION >
[IPDM E/R (WITH I-KEY)]
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Fail-safe
INFOID:0000000009266415
CAN COMMUNICATION CONTROL
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
If No CAN Communication Is Available With BCM
IGNITION RELAY MALFUNCTION DETECTION FUNCTION
• IPDM E/R monitors the voltage at the contact circuit and excitation coil circuit of the ignition relay inside it.
• IPDM E/R judges the ignition relay error if the voltage differs between the contact circuit and the excitation
coil circuit.
• If the ignition relay cannot turn OFF due to contact seizure, it activates the tail lamp relay for 10 minutes to
alert the user to the ignition relay malfunction when the ignition switch is turned OFF.
81
BR
Push-button ignition
switch
Input
ON
Press the push-button igni-
tion switch
0 – 1 V
Release the push button ig-
nition switch
9 – 16 V
90
L
Ignition relay power
supply
Input
ON
Ignition switch OFF or ACC
9 – 16 V
Ignition switch ON
0 – 1 V
Terminal
Wire
color
Circuit
Input/
Output
Ignition
switch
Condition
Value
Control part
Fail-safe operation
Cooling fan
• The cooling fan relay turn ON when the ignition switch is turned ON (Cooling fan HI operation)
• The cooling fan relay turn OFF when the ignition switch is turned OFF
A/C compressor
A/C relay OFF
Alternator
Outputs the power generation command signal (PWM signal) 0%
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
• 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.
Front fog lamp
Front fog lamp relay OFF
Horn
Horn OFF
Ignition relay
The status just before activation of fail-safe is maintained.
Starter motor
Starter control relay OFF
DTC
Ignition switch
Ignition relay
Tail lamp relay
—
ON
ON
—
—
OFF
OFF
—