Nissan Frontier. Manual - part 970

 

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Nissan Frontier. Manual - part 970

 

 

LAN-30

< BASIC INSPECTION >

[CAN FUNDAMENTAL]

DIAGNOSIS AND REPAIR WORKFLOW

c.

Reception item of “TRANSMISSION”: “VDC/TCS/ABS”, “3” is indicated in the “PAST”. This means TCM

could not receive the signal from ABS in the past. Draw a line between TCM and ABS (line 2-c in the fig-

ure below).

3. CAN DIAG SUPPORT MNTR (without PAST): Check the CAN DIAG SUPPORT MNTR (without PAST) of

units indicating “U1000” or “U1001” on SELF-DIAG RESULTS. Draw a line on the diagnosis sheet to indi-

cate the possible error circuit.

NOTE:

• While an error occurred in the past according to SELF-DIAG RESULTS, it is unclear which signal is not

received. Assume that errors were detected from all reception items.

• Draw a single line among the unit and all reception items. (Work flow differs from CAN DIAG SUPPORT

MNTR (with PAST).)

a. Reception item of “EPS”: Assume that the unit could not receive the signals from ECM, ABS, and M&A.

Draw a line among EPS, ECM, ABS, and M&A (line 3-a in the figure below).

JSMIA0820GB

LAN

DIAGNOSIS AND REPAIR WORKFLOW

LAN-31

< BASIC INSPECTION >

[CAN FUNDAMENTAL]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

b. Reception item of “ABS”: Assume that the unit could not receive the signal from ECM. Draw a line

between ABS and ECM (line 3-b in the figure below).

4. Search for the possible cause using CAN communication signal chart using information from the interview

with the customer.

NOTE:

For the details of CAN communication signal, refer to 

LAN-54, "CAN Communication Signal Chart"

.

a. ABS warning lamp turned ON and speedometer did not move: This means that “ABS warning lamp signal”

and “Vehicle speed signal” could not communicate between M&A and ABS (4-a in the figure below).

JSMIA0821GB

LAN-32

< BASIC INSPECTION >

[CAN FUNDAMENTAL]

DIAGNOSIS AND REPAIR WORKFLOW

b. The tachometer moved normally: This means that “Engine speed signal” could communicate normally

between ECM and M&A (4-b in the figure below).

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

below).

SKIB8895E

LAN

DIAGNOSIS AND REPAIR WORKFLOW

LAN-33

< BASIC INSPECTION >

[CAN FUNDAMENTAL]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

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 below).

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 below).

NOTE:

For abbreviations, refer to 

LAN-36, "Abbreviation List"

.

SKIB8735E

 

 

 

 

 

 

 

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