Nissan Titan A60. Instruction — part 682

LAN-24

< BASIC INSPECTION >

[CAN FUNDAMENTAL]

DIAGNOSIS AND REPAIR WORKFLOW

On CAN DIAG SUPPORT MNTR (without PAST), “UNKWN” is indicated even though the item is not used

in the trouble diagnosis. For the details of each item on CAN diagnostic support monitor, refer to

LAN-54,

"CAN Diagnostic Support Monitor"

.

f.

Reception item of “M&A”: On “TCM”, “UNKWN” is indicated. This means M&A cannot receive the signal

from TCM. Draw a line to indicate an error between M&A and TCM (line 2-f in the figure below).

g. Reception item of “ADP”: On “TCM”, “UNKWN” is indicated. This means ADP cannot receive the signal

from TCM. Draw a line to indicate an error between ADP and TCM (line 2-g in the figure below).

PKID1216E

LAN

DIAGNOSIS AND REPAIR WORKFLOW

LAN-25

< BASIC INSPECTION >

[CAN FUNDAMENTAL]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

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

< BASIC INSPECTION >

[CAN FUNDAMENTAL]

DIAGNOSIS AND REPAIR WORKFLOW

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-36, "Abbreviation List"

.

PKID1218E

LAN

DIAGNOSIS AND REPAIR WORKFLOW

LAN-27

< BASIC INSPECTION >

[CAN FUNDAMENTAL]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

5. Perform the inspection for the detected error circuit. For the inspection procedure, refer to “MALFUNC-

TION 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.