Nissan Maxima. Manual — part 883
PCS-12
< SYSTEM DESCRIPTION >
[IPDM E/R]
DIAGNOSIS SYSTEM (IPDM E/R)
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 mode
AWMIA1321GB
Symptom
Inspection contents
Possible cause
Any of the following components do not operate
• Parking lamps
• Side marker lamps
• License plate lamps
• Tail lamps
• Front fog lamps (if equipped)
• Headlamp (HI, LO)
• Front wiper
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
• Combination meter signal
input circuit
• CAN communication signal
between combination meter
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
PCS
DIAGNOSIS SYSTEM (IPDM E/R)
PCS-13
< SYSTEM DESCRIPTION >
[IPDM E/R]
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CONSULT Function (IPDM E/R)
INFOID:0000000009467100
APPLICATION ITEM
CONSULT performs the following functions via CAN communication with IPDM E/R.
ECU IDENTIFICATION
The IPDM E/R part number is displayed.
SELF DIAGNOSTIC RESULT
DATA MONITOR
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
Cooling fan does not operate
Perform auto active test.
Does the cooling fan operate?
YES
• ECM signal input circuit
• CAN communication signal
between ECM and IPDM E/
R
NO
• Cooling fan
• Harness or connector be-
tween cooling fan and cool-
ing fan relays
• Cooling fan relays
• Harness or connector be-
tween IPDM E/R and cool-
ing fan relays
• IPDM E/R
Symptom
Inspection contents
Possible cause
Direct Diagnostic Mode
Description
ECU Identification
The IPDM E/R part number is displayed.
Self Diagnostic Result
The IPDM E/R self diagnostic results are displayed.
Data Monitor
The IPDM E/R input/output data is displayed in real time.
Active Test
The IPDM E/R activates outputs to test components.
CAN Diag Support Mntr
The result of transmit/receive diagnosis of CAN communication is diplayed.
Monitor Item [Unit]
Main
Signals
Description
MOTOR FAN REQ [1/2/3/4]
×
Indicates cooling fan speed signal received from ECM on CAN communication
line
AC COMP REQ [On/Off]
×
Indicates A/C compressor request signal received from ECM on CAN commu-
nication line
TAIL&CLR REQ [On/Off]
×
Indicates position light request signal received from BCM on CAN communica-
tion line
HL LO REQ [On/Off]
×
Indicates low beam request signal received from BCM on CAN communication
line
PCS-14
< SYSTEM DESCRIPTION >
[IPDM E/R]
DIAGNOSIS SYSTEM (IPDM E/R)
ACTIVE TEST
CAN DIAG SUPPORT MNTR
LAN-12, "CAN Diagnostic Support Monitor"
.
HL HI REQ [On/Off]
×
Indicates high beam request signal received from BCM on CAN communication
line
FR FOG REQ [On/Off]
×
Indicates front fog light request signal received from BCM on CAN communica-
tion line
FR WIP REQ [Stop/1LOW/Low/Hi]
×
Indicates front wiper request signal received from BCM on CAN communication
line
WIP AUTO STOP [STOP P/ACT P]
×
Indicates condition of front wiper auto stop signal
WIP PROT [Off/BLOCK]
×
Indicates condition of front wiper fail-safe operation
IGN RLY1 -REQ [On/Off]
Indicates ignition switch ON signal received from BCM on CAN communication
line
IGN RLY [On/Off]
×
Indicates condition of ignition relay-1
PUSH SW [On/Off]
Indicates condition of push-button ignition switch
INTER/NP SW [On/Off]
Indicates condition of CVT shift position
ST RLY CONT [On/Off]
Indicates starter relay status signal received from BCM on CAN communication
line
IHBT RLY -REQ [On/Off]
Indicates starter control relay signal received from BCM on CAN communication
line
ST/INHI RLY [Off/ ST /INHI]
Indicates condition of starter relay and starter control relay
DETENT SW [On/Off]
Indicates condition of CVT shift selector (park position switch)
DTRL REQ [Off]
Indicates daytime light request signal received from BCM on CAN communica-
tion line
OIL P SW [Open/Close]
Indicates condition of oil pressure switch
THFT HRN REQ [On/Off]
Indicates theft warning horn request signal received from BCM on CAN commu-
nication line
HORN CHIRP [On/Off]
Indicates horn reminder signal received from BCM on CAN communication line
Monitor Item [Unit]
Main
Signals
Description
Test item
Description
HORN
This test is able to check horn operation [On].
FRONT WIPER
This test is able to check wiper motor operation [Hi/Lo/Off].
MOTOR FAN
This test is able to check cooling fan operation [4/3/2/1].
EXTERNAL LAMPS
This test is able to check external lamp operation [Fog/Hi/Lo/Tail/Off].
PCS
U1000 CAN COMM CIRCUIT
PCS-15
< DTC/CIRCUIT DIAGNOSIS >
[IPDM E/R]
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DTC/CIRCUIT DIAGNOSIS
U1000 CAN COMM CIRCUIT
Description
INFOID:0000000009467101
.
DTC Logic
INFOID:0000000009467102
DTC DETECTION LOGIC
Diagnosis Procedure
INFOID:0000000009467103
1.
PERFORM SELF DIAGNOSTIC
1. Turn ignition switch ON and wait for 2 seconds or more.
2. Check “Self Diagnostic Result” of IPDM E/R.
Is “CAN COMM CIRCUIT” displayed?
YES
>> Refer to
LAN-15, "Trouble Diagnosis Flow Chart"
NO
>> Refer to
GI-41, "Intermittent Incident"
.
DTC
CONSULT Display
DTC Detection Condition
Possible Cause
U1000
CAN COMM CIRCUIT
When any listed module cannot communi-
cate with CAN communication signal con-
tinuously for 2 seconds or more
In CAN communication system, any item (or items)
of the following listed below is malfunctioning.
• Transmission
• Receiving (ECM)
• Receiving (METER/M&A)
• Receiving (BCM)
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