Infiniti QX56 (JA60). Manual - part 948

TM-94

< COMPONENT DIAGNOSIS >

MAIN POWER SUPPLY AND GROUND CIRCUIT

MAIN POWER SUPPLY AND GROUND CIRCUIT

Diagnosis Procedure

INFOID:0000000005148678

1.

CHECK TCM POWER SOURCE STEP 1

1. Turn ignition switch OFF.

2. Disconnect A/T assembly harness connector.

3. Check voltage between A/T assembly harness connector termi-

nals and ground.

OK or NG

OK

>> GO TO 2.

NG

>> GO TO 3.

2.

CHECK TCM POWER SOURCE STEP 2

1. Disconnect A/T assembly harness connector.

2. Turn ignition switch ON. (Do not start engine.)

3. Check voltage between A/T assembly harness connector termi-

nals and ground.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 3.

3.

DETECT MALFUNCTIONING ITEM

Check the following items:

• Harness for short or open between battery and A/T assembly harness connector terminals 1, 2

• Harness for short or open between ignition switch and A/T assembly harness connector terminal 6

• 10A fuse [No. 3, 4, located in the fuse block (J/B)] and 10A fuse (No. 49, located in the IPDM E/R)

• Ignition switch
OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace damaged parts.

4.

CHECK TCM GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect A/T assembly harness connector.

3. Check continuity between A/T assembly harness connector F9

terminals 5, 10 and ground.

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

OK or NG

OK

>> GO TO 5.

NG

>> Repair open circuit or short to ground or short to power

in harness or connectors.

Item

Connector

Terminal

Voltage

TCM

F9

1 - Ground

Battery voltage

2 - Ground

6 - Ground

0V

SCIA2104E

Item

Connector

Terminal

Voltage

TCM

F9

1 - Ground

Battery voltage

2 - Ground

6 - Ground

SCIA2105E

Continuity should exist.

SCIA2106E

MAIN POWER SUPPLY AND GROUND CIRCUIT

TM-95

< COMPONENT DIAGNOSIS >

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5.

DETECT MALFUNCTIONING ITEM

Check the following items:

• The A/T assembly harness connector terminals for damage or loose connection with harness connector.
OK or NG

OK

>> GO TO 6.

NG

>> Repair or replace damaged parts.

6.

PERFORM SELF-DIAGNOSIS

Perform self-diagnosis. Refer to 

TM-32, "CONSULT-III Function (TRANSMISSION)"

.

OK or NG

OK

>> INSPECTION END

NG-1 >> Self-diagnosis does not activate: GO TO 7.

NG-2 >> DTC is displayed: Check the malfunctioning system. Refer to 

TM-32, "CONSULT-III Function

(TRANSMISSION)"

.

7.

CHECK TERMINAL CORD ASSEMBLY

1. Remove control valve with TCM. Refer to 

TM-172, "Control Valve with TCM and A/T Fluid Temperature

Sensor 2 and Plug"

.

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

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

minals and TCM connector terminals.

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

minals and TCM connector terminals.

5. If OK, check harness for short to ground and short to power.
OK or NG

OK

>> Replace the control valve with TCM. Refer to 

TM-172, "Control Valve with TCM and A/T Fluid

Temperature Sensor 2 and Plug"

.

NG

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

Item

 Connector

Terminal

Continuity

A/T assembly harness con-
nector

F9

1 

Yes

TCM connector 

F502

9

A/T assembly harness con-
nector

F9

2

Yes

TCM connector 

F502

10

A/T assembly harness con-
nector

F9

6

Yes

TCM connector 

F502

4

SCIA5464E

Item

 Connector

Terminal

Continuity

A/T assembly harness con-
nector

F9

5

Yes

TCM connector 

F504

21

A/T assembly harness con-
nector

F9

10

Yes

TCM connector 

F504

22

SCIA5465E

TM-96

< COMPONENT DIAGNOSIS >

CLOSED THROTTLE POSITION AND WIDE OPEN THROTTLE POSITION CIR-

CUIT

CLOSED THROTTLE POSITION AND WIDE OPEN THROTTLE POSITION
CIRCUIT

CONSULT-III Reference Value in Data Monitor Mode

INFOID:0000000005148679

Diagnosis Procedure

INFOID:0000000005148680

1.

CHECK CAN COMMUNICATION LINE

Perform the self-diagnosis. Refer to 

TM-32, "CONSULT-III Function (TRANSMISSION)"

.

Is a malfunction in the CAN communication indicated in the results?

YES

>> Check CAN communication line. Refer to 

TM-40

.

NO

>> GO TO 2.

2.

CHECK THROTTLE POSITION SIGNAL CIRCUIT

With CONSULT-III

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

2. Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.

3. Depress accelerator pedal and read out the value of “CLSD THL POS” and “W/O THL POS”.

OK or NG

OK

>> INSPECTION END

NG

>> Check the following items. If NG, repair or replace damaged parts.

• Perform the self-diagnosis for “ENGINE” with CONSULT-III.

• Open circuit or short to ground or short to power in harness or connectors.

• Pin terminals for damage or loose connection with harness connector.

Item name

Condition 

Display value

CLSD THL POS

Released accelerator pedal.

ON

Fully depressed accelerator pedal.

OFF

W/O THL POS

Fully depressed accelerator pedal.

ON

Released accelerator pedal.

OFF

Accelerator Pedal Operation

Monitor Item

CLSD THL POS

W/O THL POS

Released

ON

OFF

Fully depressed

OFF

ON

BRAKE SIGNAL CIRCUIT

TM-97

< COMPONENT DIAGNOSIS >

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BRAKE SIGNAL CIRCUIT

CONSULT-III Reference Value in Data Monitor Mode

INFOID:0000000005148681

Diagnosis Procedure

INFOID:0000000005148682

1.

CHECK CAN COMMUNICATION LINE

Perform the self-diagnosis. Refer to 

TM-32, "CONSULT-III Function (TRANSMISSION)"

.

Is a malfunction in the CAN communication indicated in the results?

YES

>> Check CAN communication line. Refer to 

TM-40, "Diagnosis Procedure"

.

NO

>> GO TO 2.

2.

CHECK STOP LAMP SWITCH CIRCUIT

With CONSULT-III

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

2. Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.

3. Read out ON/OFF switching action of the “BRAKESW”.
OK or NG

OK

>> INSPECTION END

NG

>> GO TO 3.

3.

CHECK STOP LAMP SWITCH

Check continuity between stop lamp switch terminals 1 and 2.

Check stop lamp switch after adjusting brake pedal — refer to

BR-15, "Inspection and Adjustment"

.

OK or NG

OK

>> Check stop lamp switch circuit.

NG

>> Repair or replace stop lamp switch.

Item name

Condition 

Display value

BRAKESW

Depressed brake pedal.

ON

Released brake pedal.

OFF

Condition

Continuity

When brake pedal is depressed.

Yes

When brake pedal is released.

No

AWDIA0165ZZ