Infiniti M35/M45 Y50. Manual — part 847

TROUBLE DIAGNOSES WORK FLOW

LAN-37

[CAN FUNDAMENTAL]

C

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LAN

5.

Fill out the diagnosis sheet based on information from step 4.

a.

The ABS warning lamp turned ON and speedometer did not move: Assume that a possible cause is no
communication between M&A and ABS. Draw a line between M&A and ABS. (Line 5-a in the figure).

b.

The tachometer moved normally: Put check marks between ECM and M&A. The circuit between ECM and
M&A is functioning properly (check marks 5-b in the figure).

SKIB8735E

LAN-38

[CAN FUNDAMENTAL]

TROUBLE DIAGNOSES WORK FLOW

6.

The circuit which has the most amount of lines are the possible cause. Error is detected from ABS actua-
tor and electric unit (control unit) branch line (shaded in the figure).

NOTE:
For abbreviations, refer to

LAN-41, "Abbreviation List"

.

7.

Perform the inspection procedure for the possible cause. Refer to

LAN-82, "Malfunction Area Chart"

.

SKIB8896E

TROUBLE DIAGNOSES WORK FLOW

LAN-39

[CAN FUNDAMENTAL]

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LAN

Past Error — Short Circuit —

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

Item (CONSULT-II)

Indication

Inspection procedure

SELF-DIAG RESULTS

“U1000” and “U1001” is indicated in the past for most units.

Refer to

LAN-82, "Malfunction

Area Chart"

.

CAN DIAG SUPPORT MNTR

Only on CAN DIAG SUPPORT MNTR (with PAST), “1 - 39” is
indicated on “PAST” of “TRANSMIT DIAG” and the reception
item.

SKIB8897E

LAN-40

[CAN]

INDEX FOR DTC

[CAN]

INDEX FOR DTC

PFP:00004

DTC No. Index

NKS004FM

DTC

Self-diagnosis item

(CONSULT-II indication)

DTC detection condition

Inspection

U1000

CAN COMM CIRCUIT

When ECM is not transmitting or receiving CAN
communication signal of OBD (emission-related
diagnosis) for 2 seconds or more.

Refer to

LAN-41, "HOW

TO USE THIS SEC-
TION"

.

When a control unit (except for ECM) is not
transmitting or receiving CAN communication
signal for 2 seconds or more.

U1001

CAN COMM CIRCUIT

When ECM is not transmitting or receiving CAN
communication signal other than OBD (emis-
sion-related diagnosis) for 2 seconds or more.

U1002

SYSTEM COMM

When a control unit is not transmitting or receiv-
ing CAN communication signal for 2 seconds or
less.

Start the inspection.
Refer to the applicable
section of the indicated
control unit.

U1010

CONTROL UNIT [CAN]

When an error is detected during the initial diag-
nosis for CAN controller of each control unit.

Replace the control unit
indicating “U1010”.