Infiniti FX35 / FX45. Manual - part 762

TROUBLE DIAGNOSES WORK FLOW

LAN-25

< SERVICE INFORMATION >

[CAN FUNDAMENTAL]

C

D

E

F

G

H

I

J

L

M

A

B

LAN

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h.

Reception item of “ABS”: “UNKWN” is not indicated. This indicates normal communication between ABS
and its receiving units. Do not draw any line.

i.

Reception item of “IPDM-E”: “UNKWN” is not indicated. This indicates normal communication between
IPDM-E and its receiving units. Do not draw any line.

3.

Based on information received from “CAN DIAG SUPPORT MNTR”, place a check mark on the known
good CAN communication line between ECM and IPDM-E.

a.

Through the previous procedure, the circuit between ADP splice and TCM has the most amount of lines
(shade 3-a in the figure below).

b.

Place a check mark on the known good lines to establish the error circuit.

PKID1217E

LAN-26

< SERVICE INFORMATION >

[CAN FUNDAMENTAL]

TROUBLE DIAGNOSES WORK FLOW

Reception item of “IPDM-E”: On “ECM”, “OK” is indicated. IPDM-E communicates normally with ECM. Put
a check mark on the normal circuit between ECM and IPDM-E (check mark 3-b in the figure below).

4.

Through the above procedure, the error is detected in the TCM branch line (shaded in the figure below).
NOTE:
For abbreviations, refer to 

LAN-37, "Abbreviation List"

.

PKID1218E

TROUBLE DIAGNOSES WORK FLOW

LAN-27

< SERVICE INFORMATION >

[CAN FUNDAMENTAL]

C

D

E

F

G

H

I

J

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M

A

B

LAN

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P

5.

Perform the inspection for the detected error circuit. For the inspection procedure, refer to 

LAN-68, "Mal-

function Area Chart"

. 

Present Error — Short Circuit —

When the symptoms listed below exist, a short circuit of the CAN communication line is a possible cause.

Received data

Error symptom

• Most the units connected to the CAN communication system go into fail-safe mode or are deactivated.

Inspection procedure

PKID1219E

Item (CONSULT-III)

Indication

ECU list (on the CAN DIAG SUPPORT MNTR)

All Diag on CAN units are not indicated.

CAN DIAG SUPPORT MNTR

“UNKWN” is indicated under “TRANSMIT DIAG” and most reception items.

LAN-28

< SERVICE INFORMATION >

[CAN FUNDAMENTAL]

TROUBLE DIAGNOSES WORK FLOW

• Refer to 

LAN-68, "Malfunction Area Chart"

.

Past Error — Open Circuit —

Review CAN communication signal chart based on information received from the interview with the customer
and on past error information from SELF-DIAG RESULTS and CAN DIAG SUPPORT MNTR.

PKID1220E