Nissan Frontier. Manual - part 969

LAN-26

< BASIC INSPECTION >

[CAN FUNDAMENTAL]

DIAGNOSIS AND REPAIR WORKFLOW

Reception item of “IPDM E/R”: 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"

.

JSMIA0817GB

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DIAGNOSIS AND REPAIR WORKFLOW

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< BASIC INSPECTION >

[CAN FUNDAMENTAL]

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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)

Indication

SELF-DIAG RESULTS

All Diag on CAN units are not indicated.

CAN DIAG SUPPORT MNTR

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

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< 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.

JSMIA0818GB

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DIAGNOSIS AND REPAIR WORKFLOW

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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-56, "CAN Diagnostic Sup-

port Monitor"

.

a. Reception item of “ENGINE”: “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 “METER/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).

JSMIA0819GB