Infiniti FX35, FX50 (S51). Manual - part 1815

DIAGNOSIS SYSTEM (TCM)

TM-67

< SYSTEM DESCRIPTION >

[7AT: RE7R01A (VQ35HR)]

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DTC Work Support

Item

Description

Check item

1ST GR FNCTN P0731

Following items for “1GR incorrect ratio” can be confirmed.
• Self-diagnosis status (whether the diagnosis is being performed or not)
• Self-diagnostic results (OK or NG)

• Input clutch solenoid 

valve

• Front brake solenoid 

valve

• Direct clutch solenoid 

valve

• High and low reverse 

clutch solenoid valve

• Low brake solenoid 

valve

• 2346 brake solenoid 

valve

• Anti-interlock sole-

noid valve

• Output speed sensor
• Input speed sensor 1, 

2

• Each clutch and brake
• Hydraulic control cir-

cuit

2ND GR FNCTN P0732

Following items for “2GR incorrect ratio” can be confirmed.
• Self-diagnosis status (whether the diagnosis is being performed or not)
• Self-diagnostic results (OK or NG)

3RD GR FNCTN P0733

Following items for “3GR incorrect ratio” can be confirmed.
• Self-diagnosis status (whether the diagnosis is being performed or not)
• Self-diagnostic results (OK or NG)

4TH GR FNCTN P0734

Following items for “4GR incorrect ratio” can be confirmed.
• Self-diagnosis status (whether the diagnosis is being performed or not)
• Self-diagnostic results (OK or NG)

5TH GR FNCTN P0735

Following items for “5GR incorrect ratio” can be confirmed.
• Self-diagnosis status (whether the diagnosis is being performed or not)
• Self-diagnostic results (OK or NG)

6TH GR FNCTN P0729

Following items for “6GR incorrect ratio” can be confirmed.
• Self-diagnosis status (whether the diagnosis is being performed or not)
• Self-diagnostic results (OK or NG)

7TH GR FNCTN P1734

Following items for “7GR incorrect ratio” can be confirmed.
• Self-diagnosis status (whether the diagnosis is being performed or not)
• Self-diagnostic results (OK or NG)

TCC SOL FNCTN CHECK

Following items for “TCC solenoid function” can be confirmed.
• Self-diagnosis status (whether the diagnosis is being performed or not)
• Self-diagnostic results (OK or NG)

• Harness or connec-

tors

• Torque converter 

clutch solenoid valve

• Torque converter
• Input speed sensor 1, 

2

• Hydraulic control cir-

cuit

TM-68

< DTC/CIRCUIT DIAGNOSIS >

[7AT: RE7R01A (VQ35HR)]

U1000 CAN COMM CIRCUIT

DTC/CIRCUIT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000005250024

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 independently). 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.

DTC Logic

INFOID:0000000005250025

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.

>> GO TO 2.

2.

CHECK DTC DETECTION

 With CONSULT-III

1.

Start the engine.

2.

Run engine for at least 2 consecutive seconds at idle speed.

3.

Perform “Self Diagnostic Results” in “TRANSMISSION”.

 With GST

Follow the procedure “With CONSULT-III”

Is “U1000” detected?

YES

>> Go to 

TM-68, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005250026

Go to 

LAN-20, "Trouble Diagnosis Flow Chart"

.

DTC

Trouble diagnosis name

DTC is detected if...

Possible cause

U1000

CAN Communication Line

TCM cannot transmit or receive 
CAN communication signals 
continuously for 2 seconds or 
more when the ignition switch is 
ON.

• Harness or connectors

(CAN communication line is 
open or shorted.)

• TCM

P0615 STARTER RELAY

TM-69

< DTC/CIRCUIT DIAGNOSIS >

[7AT: RE7R01A (VQ35HR)]

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P0615 STARTER RELAY

Description

INFOID:0000000005250027

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

DTC Logic

INFOID:0000000005250028

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.

>> GO TO 2.

2.

CHECK DTC DETECTION

 With CONSULT-III

1.

Shift the selector lever to “P” and “N” positions.

2.

Turn ignition switch ON and wait 2 seconds or more.

3.

Perform “Self Diagnostic Results” in “TRANSMISSION”.

Is “P0615” detected?

YES

>> Go to 

TM-69, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005250029

1.

CHECK STARTER RELAY SIGNAL

1.

Turn ignition switch ON.

2.

Check voltage between IPDM E/R connector terminal and ground.

Is the inspection result normal?

YES

>> Check starter relay circuit. Refer to 

STR-10, "Wiring Diagram - STARTING SYSTEM -"

.

NO

>> GO TO 2.

2.

 CHECK HARNESS BETWEEN A/T ASSEMBLY AND IPDM E/R (PART 1)

1.

Turn ignition switch OFF.

2.

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

3.

Check the continuity between A/T assembly vehicle side harness connector terminal and IPDM E/R vehi-
cle side harness connector terminal.

DTC

Trouble diagnosis name

DTC is detected if...

Possible cause

P0615

Starter Relay Circuit

The starter monitor value is 
OFF when the ignition switch is 
ON at the“ P” and “N” positions.

• Harness or connectors

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

• Starter relay circuit

IPDM E/R connector

Ground

Condition

Voltage (Approx.)

Connector

Terminal

E5

30

Selector lever in “P” and 
“N” positions.

Battery voltage

Selector lever in other 
positions.

0 V

TM-70

< DTC/CIRCUIT DIAGNOSIS >

[7AT: RE7R01A (VQ35HR)]

P0615 STARTER RELAY

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace damaged parts.

3.

CHECK HARNESS BETWEEN A/T ASSEMBLY AND IPDM E/R (PART 2)

Check the continuity between A/T assembly vehicle side harness connector terminal and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace damaged parts.

4.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-36, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace A/T assembly. Refer to 

TM-181, "2WD : Exploded View"

 (2WD), 

TM-184, "AWD :

Exploded View"

 (AWD).

NO

>> Repair or replace damaged parts.

A/T assembly vehicle side harness connector

IPDM E/R vehicle side harness connector

Continuity

Connector

Terminal

Connector

Terminal

F51

9

E5

30

Existed

A/T assembly vehicle side harness connector

Ground

Continuity

Connector

Terminal

F51

9

Not existed