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Nissan Titan. Manual - part 591

U0100 LOST COMMUNICATION (ECM A)

TM-47

< DTC/CIRCUIT DIAGNOSIS >

DTC/CIRCUIT DIAGNOSIS

U0100 LOST COMMUNICATION (ECM A)

Description

INFOID:0000000009885703

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 line, CAN L line) allowing a high rate of information transmission

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

On Board Diagnosis Logic

INFOID:0000000009885704

• This is an OBD-II self-diagnostic item.

• Diagnostic trouble code “U0100” with CONSULT is detected when TCM is unable to receive the CAN com-

munications signal from ECM.

Possible Cause

INFOID:0000000009885705

• ECM

• Harness or connectors

(CAN communication line is open or shorted.)

DTC Confirmation Procedure

INFOID:0000000009885706

NOTE:

If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF”

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

After the repair, perform the following procedure to confirm the malfunction is eliminated.

WITH CONSULT

1. Turn ignition switch “ON”. (Do not start engine.)

2. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT.

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

4. If DTC is detected, go to

TM-47, "Diagnosis Procedure"

WITH GST

Follow the procedure “WITH CONSULT”.

Diagnosis Procedure

INFOID:0000000009885707

CHECK CAN COMMUNICATION CIRCUIT

With CONSULT

1. Turn ignition switch “ON” and start engine.

2. Select “SELF-DIAG RESULTS” mode for “TRANSMISSION” with CONSULT.
Is “U0100” detected?

YES

>> Go to LAN section. Refer to

LAN-14, "Trouble Diagnosis Flow Chart"

>> INSPECTION END

TM-48

< DTC/CIRCUIT DIAGNOSIS >

U1000 CAN COMM CIRCUIT

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000009885708

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 line, CAN L line) allowing a high rate of information transmission

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

On Board Diagnosis Logic

INFOID:0000000009885709

• This is an OBD-II self-diagnostic item.

• Diagnostic trouble code “U1000” with CONSULT or 17th judgment flicker without CONSULT is detected

when TCM cannot communicate to other control units.

Possible Cause

INFOID:0000000009885710

Harness or connectors

(CAN communication line is open or shorted.)

DTC Confirmation Procedure

INFOID:0000000009885711

NOTE:

If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF”

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

After the repair, perform the following procedure to confirm the malfunction is eliminated.

WITH CONSULT

1. Turn ignition switch “ON”. (Do not start engine.)

2. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT.

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

4. If DTC is detected, go to

TM-48, "Diagnosis Procedure"

WITH GST

Follow the procedure “WITH CONSULT”.

Diagnosis Procedure

INFOID:0000000009885712

CHECK CAN COMMUNICATION CIRCUIT

With CONSULT

1. Turn ignition switch “ON” and start engine.

2. Select “SELF-DIAG RESULTS” mode for “TRANSMISSION” with CONSULT.
Is “U1000” detected?

YES

>> Go to LAN section. Refer to

LAN-14, "Trouble Diagnosis Flow Chart"

>> INSPECTION END

P0615 STARTER RELAY

TM-49

< DTC/CIRCUIT DIAGNOSIS >

P0615 STARTER RELAY

Description

INFOID:0000000009885713

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

CONSULT Reference Value in Data Monitor Mode

INFOID:0000000009885714

On Board Diagnosis Logic

INFOID:0000000009885715

• This is not an OBD-II self-diagnostic item.

• Diagnostic trouble code “P0615” with CONSULT is detected when starter relay is switched “ON” other than

at “P” or “N” position. (Or when switched “OFF” at “P” or “N” position).

Possible Cause

INFOID:0000000009885716

• Harness or connectors

(The starter relay and TCM circuit is open or shorted.)

• Starter relay

DTC Confirmation Procedure

INFOID:0000000009885717

NOTE:

If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF”

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

After the repair, perform the following procedure to confirm the malfunction is eliminated.

WITH CONSULT

1. Turn ignition switch “ON”. (Do not start engine.)

2. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT.

3. Start engine.

4. Drive vehicle for at least 2 consecutive seconds.

5. If DTC is detected, go to

TM-49, "Diagnosis Procedure"

Diagnosis Procedure

INFOID:0000000009885718

CHECK STARTER RELAY

With CONSULT

1. Turn ignition switch “ON”. (Do not start engine.)

2. Select “SELECTION FROM MENU” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT

and check monitor “STARTER RELAY” ON/OFF.

Without CONSULT

1. Turn ignition switch “ON”. (Do not start engine.)

Item name

Condition

Display value

STARTER RELAY

Selector lever in “N”,“P” position.

Selector lever in other position.

OFF

Item name

Condition

Display value

STARTER RELAY

Selector lever in "N'', "P'' positions.

Selector lever in other positions.

OFF

TM-50

< DTC/CIRCUIT DIAGNOSIS >

P0615 STARTER RELAY

2. Check voltage between the IPDM E/R connector and ground.

OK or NG

>> GO TO 5.

>> GO TO 2.

CHECK HARNESS BETWEEN A/T ASSEMBLY HARNESS CONNECTOR AND IPDM E/R CONECTOR.

1. Turn ignition switch OFF.

2. Disconnect A/T assembly harness connector and IPDM E/R connector.

3. Check continuity between A/T assembly harness connector and

IPDM E/R connector.

4. If OK, check harness for short to ground and short to power.

5. Reinstall any part removed.
OK or NG

>> GO TO 3.

>> Repair open circuit or short to ground or short to power in harness or connectors.

CHECK TERMINAL CORD ASSEMBLY

1. Remove control valve with TCM. Refer to

TM-201, "Control Valve with TCM"

2. Disconnect A/T assembly harness connector and TCM connector.

3. Check continuity between A/T assembly harness connector ter-

minal and TCM connector terminal.

4. If OK, check harness for short to ground and short to power.

5. Reinstall any part removed.
OK or NG

>> GO TO 4.

>> Replace open circuit or short to ground and short to power in harness or connectors.

DETECT MALFUNCTIONING ITEM

Check the following items:

• Starter relay, Refer to

STR-10, "System Description"

• IPDM E/R, Refer to

PCS-18, "Physical Values"

OK or NG

>> Replace the control valve with TCM. Refer to

TM-201, "Control Valve with TCM"

>> Repair or replace damaged parts.

Item

Connector

Terminal

Shift position

Voltage (Approx.)

Starter re-
lay

E122

Ground

"N'' and "P''

Battery voltage

"R'' and "D''

LCIA0320E

Item

Connector

Terminal

Continuity

A/T assembly harness con-
nector (floor shift)

Yes

A/T assembly harness con-
nector (column shift)

F17

IPDM E/R connector

E122

WCIA0427E

Item

Connector

Terminal

Continuity

A/T assembly har-
ness connector
(floor shift)

Yes

A/T assembly har-
ness connector
(column shift)

F17

TCM connector

F502

SCIA5440E

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