Infiniti QX56 (Z62). Manual — part 375
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< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (IPDM E/R)
DIAGNOSIS SYSTEM (IPDM E/R)
Diagnosis Description
INFOID:0000000006349776
AUTO ACTIVE TEST
Description
In auto active test, the IPDM E/R sends a drive signal to the following systems to check their operation.
• Oil pressure warning lamp
• Rear window defogger
• Front wiper (LO, HI)
• Parking lamp
• License plate lamp
• Tail lamp
• Side marker lamp
• Front fog lamp
• Headlamp (LO, HI)
• A/C compressor (magnet clutch)
Operation Procedure
CAUTION:
Never perform auto active test in the following conditions.
• Engine is running.
• CONSULT-III is connected.
1.
Close the hood and lift the wiper arms from the windshield. (Prevent windshield damage due to wiper
operation)
NOTE:
When auto active test is performed with hood opened, sprinkle water on windshield beforehand.
2.
Turn the ignition switch OFF.
3.
Turn the ignition switch ON, and within 20 seconds, press the driver door switch 10 times. Then turn the
ignition switch OFF.
CAUTION:
Close passenger door.
4.
Turn the ignition switch ON within 10 seconds. After that the horn sounds once and the auto active test
starts.
CAUTION:
Engine starts when ignition switch is turned ON while brake pedal is depressed.
5.
The oil pressure warning lamp starts blinking when the auto active test starts.
6.
After a series of the following operations is repeated 3 times, auto active test is completed.
NOTE:
• When auto active test has to be cancelled halfway through test, turn the ignition switch OFF.
• When auto active test is not activated, door switch may be the cause. Check door switch. Refer to
Inspection in Auto Active Test
When auto active test is actuated, the following operation sequence is repeated 3 times.
Operation
sequence
Inspection location
Operation
1
Oil pressure warning lamp
Blinks continuously during operation of auto active test
2
Rear window defogger
10 seconds
3
Front wiper
LO for 5 seconds
→
HI for 5 seconds
4
• Parking lamp
• License plate lamp
• Tail lamp
• Side marker lamp
• Front fog lamp
10 seconds
DIAGNOSIS SYSTEM (IPDM E/R)
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< SYSTEM DESCRIPTION >
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Concept of auto active test
• IPDM E/R starts the auto active test with the door switch signals transmitted by BCM via CAN communica-
tion. Therefore, the CAN communication line between IPDM E/R and BCM is considered normal if the auto
active test starts successfully.
• The auto active test facilitates troubleshooting if any systems controlled by IPDM E/R cannot be operated.
Diagnosis chart in auto active test
5
Headlamp
LO for 10 seconds
→
HI ON
⇔
OFF 5 times
6
A/C compressor (magnet clutch)
ON
⇔
OFF 5 times
Operation
sequence
Inspection location
Operation
JMMIA0492GB
Symptom
Inspection contents
Possible cause
Rear window defogger does not operate
Perform auto active test.
Does the rear window defog-
ger operate?
YES
BCM signal input circuit
NO
• Rear window defogger
• Rear window defogger
ground circuit
• Harness or connector be-
tween IPDM E/R and rear
window defogger
• IPDM E/R
Any of the following components do not operate
• Parking lamp
• License plate lamp
• Tail lamp
• Side marker lamp
• Front fog lamp
• Headlamp (HI, LO)
• Front wiper (HI, LO)
Perform auto active test.
Does the applicable system
operate?
YES
BCM signal input circuit
NO
• Lamp or motor
• Lamp or motor ground cir-
cuit
• Harness or connector be-
tween IPDM E/R and appli-
cable system
• IPDM E/R
A/C compressor does not operate
Perform auto active test.
Does the magnet clutch oper-
ate?
YES
• A/C auto amp. signal input
circuit
• CAN communication signal
between A/C auto amp. and
ECM
• CAN communication signal
between ECM and IPDM E/
R
NO
• Magnet clutch
• Harness or connector be-
tween IPDM E/R and mag-
net clutch
• IPDM E/R
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< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (IPDM E/R)
CONSULT-III Function (IPDM E/R)
INFOID:0000000006349777
APPLICATION ITEM
CONSULT-III performs the following functions via CAN communication with IPDM E/R.
SELF DIAGNOSTIC RESULT
DATA MONITOR
Monitor item
Oil pressure warning lamp does not operate
Perform auto active test.
Does the oil pressure warning
lamp blink?
YES
• Harness or connector be-
tween IPDM E/R and oil
pressure switch
• Oil pressure switch
• IPDM E/R
NO
• CAN communication signal
between IPDM E/R and
BCM
• CAN communication signal
between BCM and combi-
nation meter
• Combination meter
Symptom
Inspection contents
Possible cause
Diagnosis mode
Description
Ecu Identification
Allows confirmation of IPDM E/R part number.
Self Diagnostic Result
Displays the diagnosis results judged by IPDM E/R.
Data Monitor
Displays the real-time input/output data from IPDM E/R input/output data.
Active Test
IPDM E/R can provide a drive signal to electronic components to check their operations.
CAN Diag Support Monitor
The results of transmit/receive diagnosis of CAN communication can be read.
Monitor Item
[Unit]
MAIN SIG-
NALS
Description
RAD FAN REQ
[1/2/3/4]
×
Displays the value of the cooling fan speed request signal received from ECM via
CAN communication.
AC COMP REQ
[Off/On]
×
Displays the status of the A/C compressor request signal received from ECM via
CAN communication.
TAIL&CLR REQ
[Off/On]
×
Displays the status of the position light request signal received from BCM via CAN
communication.
HL LO REQ
[Off/On]
×
Displays the status of the low beam request signal received from BCM via CAN
communication.
HL HI REQ
[Off/On]
×
Displays the status of the high beam request signal received from BCM via CAN
communication.
FR FOG REQ
[Off/On]
×
Displays the status of the front fog light request signal received from BCM via
CAN communication.
FR WIP REQ
[Stop/1LOW/Low/Hi]
×
Displays the status of the front wiper request signal received from BCM via CAN
communication.
WIP AUTO STOP
[STOP P/ACT P]
×
Displays the status of the front wiper auto stop signal judged by IPDM E/R.
WIP PROT
[Off/BLOCK]
×
Displays the status of the front wiper fail-safe operation judged by IPDM E/R.
IGN RLY1 -REQ
[Off/On]
Displays the status of the ignition switch ON signal received from BCM via CAN
communication.
IGN RLY
[Off/On]
×
Displays the status of the ignition relay judged by IPDM E/R.
DIAGNOSIS SYSTEM (IPDM E/R)
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< SYSTEM DESCRIPTION >
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ACTIVE TEST
Test item
PUSH SW
[Off/On]
Displays the status of the push-button ignition switch judged by IPDM E/R.
INTER/NP SW
[Off/On]
Displays the status of the shift position judged by IPDM E/R.
ST RLY CONT
[Off/On]
Displays the status of the starter relay status signal received from BCM via CAN
communication.
IHBT RLY -REQ
[Off/On]
Displays the status of the starter control relay signal received from BCM via CAN
communication.
ST/INHI RLY
[Off/ ST ON/INHI ON/UNKWN]
Displays the status of the starter relay and starter control relay judged by IPDM
E/R.
DETENT SW
[Off/On]
Displays the status of the A/T shift selector (detention switch) judged by IPDM E/
R.
S/L RLY -REQ
[Off/On]
Displays the status of the steering lock relay signal received from BCM via CAN
communication.
S/L STATE
[LOCK/UNLK/UNKWN]
Displays the status of the steering lock judged by IPDM E/R.
OIL P SW
[Open/Close]
Displays the status of the oil pressure switch judged by IPDM E/R.
HOOD SW
[Off/On]
Displays the status of the hood switch judged by IPDM E/R.
HL WASHER REQ
[Off/On]
Displays the status of the headlamp washer request signal received from BCM via
CAN communication.
THFT HRN REQ
[Off/On]
Displays the status of the theft warning horn request signal received from BCM
via CAN communication.
HORN CHIRP
[Off/On]
Displays the status of the horn reminder signal received from BCM via CAN com-
munication.
Monitor Item
[Unit]
MAIN SIG-
NALS
Description
Test item
Operation
Description
CORNERING LAMP
LH
NOTE:
This item is indicated, but cannot be tested.
RH
HORN
On
Operates horn relay for 20 ms.
REAR DEFOGGER
Off
OFF
On
Operates the rear window defogger relay.
FRONT WIPER
Off
OFF
Lo
Operates the front wiper relay.
Hi
Operates the front wiper relay and front wiper high relay.
MOTOR FAN*
1
OFF
2
Transmits 50% pulse duty signal (PWM signal) to the cooling fan control module.
3
Transmits 75% pulse duty signal (PWM signal) to the cooling fan control module.
4
Transmits 100% pulse duty signal (PWM signal) to the cooling fan control mod-
ule.
HEAD LAMP WASHER
On
Operates the headlamp washer relay for 1 second.
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