Infiniti QX56 (JA60). Manual - part 498

DIAGNOSIS SYSTEM (BCM)

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< FUNCTION DIAGNOSIS >

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Monitor Item

[Unit]

Description

TURN SIGNAL R 
[OFF/ON]

Displays the status of the TURN RH switch in combination switch judged by BCM with the combination switch 
reading function

TURN SIGNAL L 
[OFF/ON]

Displays the status of the TURN LH switch in combination switch judged by BCM with the combination switch 
reading function

HI BEAM SW 
[OFF/ON]

Displays the status of the HI BEAM switch in combination switch judged by BCM with the combination switch 
reading function

HEAD LAMP SW1
[OFF/ON]

Displays the status of the HEADLAMP switch in combination switch judged by BCM with the combination 
switch reading function

HEAD LAMP SW2
[OFF/ON]

Displays the status of the HEADLAMP switch in combination switch judged by BCM with the combination 
switch reading function

LIGHT SW 1ST
[OFF/ON]

Displays the status of the HEADLAMP switch in combination switch judged by BCM with the combination 
switch reading function

PASSING SW
[OFF/ON]

Displays the status of the PASSING switch in combination switch judged by BCM with the combination switch 
reading function

AUTO LIGHT SW
[OFF/ON]

Displays the status of the AUTO LIGHT switch in combination switch judged by BCM with the combination 
switch reading function

FR FOG SW
[OFF/ON]

Displays the status of the FR FOG switch in combination switch judged by BCM with the combination switch 
reading function

FR WIPER HI
[OFF/ON]

Displays the status of the FR WIPER HI switch in combination switch judged by BCM with the combination 
switch reading function

FR WIPER LOW
[OFF/ON]

Displays the status of the FR WIPER LOW switch in combination switch judged by BCM with the combination 
switch reading function

FR WIPER INT
[OFF/ON]

Displays the status of the FR WIPER INT switch in combination switch judged by BCM with the combination 
switch reading function

FR WASHER SW
[OFF/ON]

Displays the status of the FR WASHER switch in combination switch judged by BCM with the combination 
switch reading function

INT VOLUME
[1 - 7]

Displays the status of wiper intermittent dial position judged by BCM with the combination switch reading 
function

RR WIPER ON
[OFF/ON]

Displays the status of the RR WIPER switch in combination switch judged by BCM with the combination 
switch reading function

RR WIPER INT
[OFF/ON]

Displays the status of the RR WIPER INT switch in combination switch judged by BCM with the combination 
switch reading function

RR WASHER SW
[OFF/ON]

Displays the status of the RR WASHER switch in combination switch judged by BCM with the combination 
switch reading function

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< FUNCTION DIAGNOSIS >

DIAGNOSIS SYSTEM (IPDM E/R)

DIAGNOSIS SYSTEM (IPDM E/R)

Diagnosis Description

INFOID:0000000005369886

AUTO ACTIVE TEST

Description

In auto active test mode, the IPDM E/R sends a drive signal to the following systems to check their operation.

• Oil pressure low/coolant pressure high warning indicator

• Oil pressure gauge

• Rear window defogger

• Front wipers

• Tail, license and parking lamps

• Front fog lamps

• Headlamps (Hi, Lo)

• A/C compressor (magnetic clutch)

• Cooling fan

Operation Procedure

1. Close the hood and front door RH, and lift the wiper arms from the windshield (to prevent windshield dam-

age due to wiper operation).

NOTE:

When auto active test is performed with hood opened, sprinkle water on windshield before hand.

2. Turn ignition switch OFF.
3. Turn the ignition switch ON and, within 20 seconds, press the front door switch LH 10 times. Then turn the

ignition switch OFF.

4. Turn the ignition switch ON within 10 seconds. After that the horn sounds once and the auto active test

starts.

5. After a series of the following operations is repeated 3 times, auto active test is completed.
NOTE:

When auto active test mode has to be cancelled halfway through test, turn ignition switch OFF.

CAUTION:

• If auto active test mode cannot be actuated, check door switch system. Refer to 

DLK-71, "Descrip-

tion"

.

• Do not start the engine.

Inspection in Auto Active Test Mode

When auto active test mode is actuated, the following 7 steps are repeated 3 times.

Operation 
sequence

Inspection Location

Operation

1

Rear window defogger

10 seconds 

2

Front wipers

LO for 5 seconds 

→ HI for 5 seconds

WKIA4655E

DIAGNOSIS SYSTEM (IPDM E/R)

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< FUNCTION DIAGNOSIS >

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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 mode

3

Tail, license and parking lamps

10 seconds

4

Front fog lamps

10 seconds

5

Headlamps

LO for 10 seconds 

→ HI on-off for 5 seconds

6

A/C compressor (magnet clutch)

ON 

⇔ OFF 5 times

7

Cooling fan

10 seconds

Operation 
sequence

Inspection Location

Operation

WKIA5163E

Symptom

Inspection contents

Possible cause

Oil pressure low warning indicator does not operate

Perform auto active test.
Does the oil pressure low 
warning indicator operate?

YES

• IPDM E/R signal input cir-

cuit

• ECM signal input circuit
• CAN communication signal 

between ECM and combi-
nation meter

NO

• CAN communication signal 

between IPDM E/R, BCM 
and combination meter

Oil pressure gauge does not operate

Perform auto active test.
Does the oil pressure gauge 
operate?

YES

IPDM E/R signal input circuit

NO

• CAN communication signal 

between IPDM E/R, BCM 
and combination meter

Rear window defogger does not operate

Perform auto active test.
Does the rear window defog-
ger operate?

YES

BCM signal input circuit

NO

• Harness or connector be-

tween A/C and AV switch 
assembly and AV control 
unit

• CAN communication signal 

between BCM and IPDM E/
R

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< FUNCTION DIAGNOSIS >

DIAGNOSIS SYSTEM (IPDM E/R)

CONSULT - III Function (IPDM E/R)

INFOID:0000000005369887

APPLICATION ITEM

CONSULT-III performs the following functions via CAN communication with IPDM E/R.

SELF DIAGNOSTIC

Refer to 

PCS-32, "DTC Index"

.

DATA MONITOR

Monitor item

Any of the following components do not operate

• Front wipers
• Tail  lamps
• License plate lamps
• Parking lamps
• Front  fog  lamps
• Headlamps (Hi, Lo)

Perform auto active test.
Does the applicable system 
operate?

YES

BCM signal input system

NO

• Lamp or front wiper motor 

malfunction

• Lamp or front wiper motor 

ground circuit

• Harness or connector be-

tween IPDM E/R and appli-
cable system

• IPDM E/R (integrated relay 

malfunction)

A/C compressor does not operate

Perform auto active test.
Does the A/C compressor op-
erate?

YES

• BCM signal input circuit
• CAN communication signal 

between BCM and ECM

• CAN communication signal 

between ECM and IPDM E/
R

NO

• Magnetic clutch malfunction
• Harness or connector be-

tween IPDM E/R and mag-
netic clutch

• IPDM E/R (integrated relay 

malfunction)

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 motor malfunc-

tion

• Harness or connector be-

tween IPDM E/R and cool-
ing fan

• IPDM E/R (integrated relay 

malfunction)

Symptom

Inspection contents

Possible cause

Diagnosis mode

Description

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

MOTOR FAN REQ
[1/2/3/4]

×

Displays the status of the cooling fan speed request signal received from ECM via 
CAN communication.

A/C COMP REQ
[OFF/ON]

×

Displays the status of the A/C request signal received from AV control unit via 
CAN communication.