Nissan Maxima. Manual — part 1145

TM-44

< DTC/CIRCUIT DIAGNOSIS >

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U1010 CONTROL UNIT (CAN)

U1010 CONTROL UNIT (CAN)

Description

INFOID:0000000010113460

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-

tiplex communication line with high data communication speed and excellent malfunction detection ability.

Many electronic control units are equipped onto a vehicle, and each control unit shares information and links

with other control units during operation (not independent). In CAN communication, control units are con-

nected with 2 communication lines (CAN-H and CAN-L) allowing a high rate of information transmission with

less wiring. Each control unit transmits/receives data but selectively reads required data only.

DTC Logic

INFOID:0000000010113461

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

NOTE:

If “DTC CONFIRMATION PROCEDURE” has been previously performed, always turn ignition switch OFF.

Then wait at least 10 seconds before performing the next test.

1.

CHECK DTC DETECTION

With CONSULT

1. Turn ignition switch ON.

2. Start engine and wait for at least 6 seconds.

3. Perform “SELF-DIAG RESULTS” mode for “TRANSMISSION”.

With GST

Follow the procedure “With CONSULT”.
Is “U1010” detected?

YES

>> Go to

TM-44, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to

GI-41, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000010113462

1.

CHECK INTERMITTENT INCIDENT

Refer to

GI-41, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace the TCM. Refer to

TM-168, "Exploded View"

.

NO

>> Repair or replace damaged parts.

DTC

Trouble diagnosis name

DTC is detected if...

Possible cause

U1010

TCM Communication Mal-
function

When detecting error during the initial diag-
nosis of CAN controller to TCM.

TCM

P0615 STARTER RELAY

TM-45

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P0615 STARTER RELAY

Description

INFOID:0000000010113463

• TCM controls starter relay in IPDM E/R.

• TCM switches starter relay ON at “P” or “N” position and allows to crank engine.

• Then it prohibits cranking other than at “P” or “N” position.

DTC Logic

INFOID:0000000010113464

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe speed.

NOTE:

Immediately after performing any “DTC CONFIRMATION PROCEDURE”, always turn ignition switch OFF.

Then wait at least 10 seconds before performing the next test.

1.

CHECK DTC DETECTION

With CONSULT

1. Turn ignition switch ON.

2. Perform “Self Diagnostic Results” in “TRANSMISSION”.
Is “P0615” detected?

YES

>> Go to

TM-45, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to

GI-41, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000010113465

Regarding Wiring Diagram information, refer to

TM-126, "Wiring Diagram"

.

1.

CHECK STARTER RELAY SIGNAL

1. Turn ignition switch ON.

2. Disconnect IPDM E/R connector.

3. Check voltage between IPDM E/R vehicle side harness connec-

tor terminal and ground.

Is the inspection result normal?

YES

>> Check starter relay and starter control relay. Refer to

PCS-11, "Diagnosis Description"

.

NO

>> GO TO 2.

2.

CHECK HARNESS BETWEEN TCM AND IPDM E/R (PART 1)

DTC

Trouble diagnosis name

DTC is detected if...

Possible cause

P0615

Starter Relay Circuit

If this signal is ON other than in “P” or “N” po-
sition, this is judged to be a malfunction.
(And if it is OFF in “P” or “N” position, this too
is judged to be a malfunction.)

• Harness or connectors

(Starter relay and TCM circuit is open or
shorted.)

• Starter relay circuit

IPDM E/R vehicle side

harness connector

Ground

Condition

Voltage

(Approx.)

Connector

Terminal

F10

72

Selector lever in “P” and
“N” positions

Battery voltage

Selector lever in other
positions

0V

AWDIA0085ZZ

TM-46

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P0615 STARTER RELAY

1. Turn ignition switch OFF.

2. Disconnect TCM connector.

3. Check continuity between TCM vehicle side harness connector

terminal and IPDM E/R vehicle side harness connector terminal.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace damaged parts.

3.

CHECK HARNESS BETWEEN TCM AND IPDM E/R (PART 2)

Check continuity between TCM vehicle side harness connector ter-

minal and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace damaged parts.

4.

DETECT MALFUNCTIONING ITEMS

Check TCM connector pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?

YES

>> Replace TCM. Refer to

TM-168, "Exploded View"

.

NO

>> Repair or replace damaged parts.

TCM vehicle side harness con-

nector

IPDM E/R vehicle side harness

connector

Continuity

Connector

Terminal

Connector

Terminal

F15 (A)

20

F10 (B)

72

Existed

AWDIA0086ZZ

TCM vehicle side harness connector

Ground

Continuity

Connector

Terminal

F15

20

Not existed

AWDIA0087ZZ

P0703 BRAKE SWITCH B

TM-47

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P0703 BRAKE SWITCH B

Description

INFOID:0000000010113466

BCM detects ON/OFF state of the stop lamp switch and transmits the data to the TCM via CAN communica-

tion by converting the data to a signal.

DTC Logic

INFOID:0000000010113467

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe speed.

NOTE:

Immediately after performing any “DTC CONFIRMATION PROCEDURE”, always turn ignition switch OFF.

Then wait at least 10 seconds before performing the next test.

1.

CHECK DTC DETECTION

With CONSULT

1. Turn ignition switch ON.

2. Start engine.

3. Drive vehicle for at least 3 consecutive seconds.

4. Perform “Self Diagnostic Results” in “TRANSMISSION”.
Is “P0703” detected?

YES

>> Go to

TM-47, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to

GI-41, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000010113468

Regarding Wiring Diagram information, refer to

TM-126, "Wiring Diagram"

.

1.

CHECK STOP LAMP SWITCH CIRCUIT

1. Check and adjust the installation position of stop lamp switch. Refer to

BR-14, "Inspection and Adjust-

ment"

.

2. Disconnect BCM connector.

3. Check voltage between BCM vehicle side harness connector

terminal and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 2.

2.

CHECK HARNESS BETWEEN STOP LAMP SWITCH AND BCM (PART 1)

DTC

Trouble diagnosis name

DTC is detected if...

Possible cause

P0703

Brake Switch B Circuit

When the brake switch does not switch to
ON or OFF.

• Harness or connectors
- (Stop lamp switch, and BCM circuit are

open or shorted.)

- (CAN communication line is open or

shorted.)

• Stop lamp switch

BCM vehicle side harness

connector

Ground

Condition

Voltage

(Approx.)

Connector

Terminal

M18

26

Depressed
brake pedal

Battery voltage

Released
brake pedal

0V

AWDIA0088ZZ