Nissan Titan A60. Manual - part 683

LAN-28

< BASIC INSPECTION >

[CAN FUNDAMENTAL]

DIAGNOSIS AND REPAIR WORKFLOW

• Refer to “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.

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DIAGNOSIS AND REPAIR WORKFLOW

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[CAN FUNDAMENTAL]

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1. SELF-DIAG RESULTS: Inspect the control units indicating “U1000” or “U1001” on SELF-DIAG RESULTS.

2. CAN DIAG SUPPORT MNTR (with PAST): Check the CAN DIAG SUPPORT MNTR (with PAST) of units

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

the possible error circuit.

NOTE:

For the details of each indication on CAN DIAG SUPPORT MNTR, refer to 

LAN-54, "CAN Diagnostic Sup-

port Monitor"

.

a. Reception item of “ECM”: “VDC/TCS/ABS”, “3” is indicated in the “PAST”. This means ECM could not

receive the signal from ABS in the past. Draw a line between ECM and ABS (line 2-a in the figure below).

b. Reception item of “M&A”: “VDC/TCS/ABS”, “3” is indicated in the “PAST”. This means M&A could not

receive the signal from ABS in the past. Draw a line between M&A and ABS (line 2-b in the figure below).

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< BASIC INSPECTION >

[CAN FUNDAMENTAL]

DIAGNOSIS AND REPAIR WORKFLOW

c.

Reception item of “TCM”: “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 figure 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).

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DIAGNOSIS AND REPAIR WORKFLOW

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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-51, "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).

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