Infiniti QX56 (JA60). Manual - part 934

TM-38

< FUNCTION DIAGNOSIS >

DIAGNOSIS SYSTEM (TCM)

Does A/T CHECK indicator lamp come on for about 2 seconds?

YES

>> GO TO 2.

NO

>> GO TO 

TM-121, "Symptom Table"

.

2.

JUDGMENT PROCEDURE STEP 1

1. Turn ignition switch OFF.

2. Keep pressing shift lock release button.

3. Move selector lever from “P” to “D” position.

4. Release accelerator pedal. (Set the closed throttle position signal “ON”.)

5. Depress brake pedal. (Stop lamp switch signal “ON”.)

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

7. Wait 3 seconds.

8. Move the selector lever from “D” to “3” position.

9. Release brake pedal. (Stop lamp switch signal “OFF”.)

10. Move the selector lever from “3” to “2” position.

11. Depress brake pedal. (Stop lamp switch signal “ON”.)

12. Depress accelerator pedal fully and release it.

>> GO TO 3.

3.

CHECK SELF-DIAGNOSIS CODE

Check A/T CHECK indicator lamp.

Refer to "Judgment Self-diagnosis Code".

If the system does not go into self-diagnostics. Refer to 

TM-45, "Diagnosis Procedure"

, 

TM-96, "Diagnosis

Procedure"

, 

TM-97, "Diagnosis Procedure"

.

>> DIAGNOSIS END

Judgment Self-diagnosis Code

If there is a malfunction, the lamp lights up for the time corresponding to the suspect circuit.

JPDIA0024GB

DIAGNOSIS SYSTEM (TCM)

TM-39

< FUNCTION DIAGNOSIS >

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Erase Self-diagnosis

• In order to make it easier to find the cause of hard-to-duplicate malfunctions, malfunction information is

stored into the control unit as necessary during use by the user. This memory is not erased no matter how

many times the ignition switch is turned ON and OFF. 

• However, this information is erased by turning ignition switch OFF after executing self-diagnostics or by

erasing the memory using the CONSULT-III.

No.

Malfunctioning item

No.

Malfunctioning item

1

Output speed sensor 

TM-50

12

Interlock 

TM-78

2

Direct clutch solenoid 

TM-86

13

1st engine braking 

TM-80

3

Torque converter 

TM-65

, 

TM-67

14

Starter relay 

TM-41

4

Line pressure solenoid 

TM-69

15

Accelerator pedal position sensor 

TM-71

5

Input clutch solenoid 

TM-82

16

Engine speed 

TM-53

6

Front brake solenoid 

TM-84

17

CAN communication line 

TM-40

7

Low coast brake solenoid 

TM-90

, 

TM-92

18

1GR incorrect ratio 

TM-55

8

High and low reverse clutch solenoid 

TM-88

19

2GR incorrect ratio 

TM-57

9

Transmission range switch 

TM-45

20

3GR incorrect ratio 

TM-59

10

A/T fluid temperature sensor 

TM-73

21

4GR incorrect ratio 

TM-61

11

Input speed sensor 

TM-48

22

5GR incorrect ratio 

TM-63

TM-40

< COMPONENT DIAGNOSIS >

U1000 CAN COMM CIRCUIT

COMPONENT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000005148528

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:0000000005148529

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

• Diagnostic trouble code “U1000 CAN COMM CIRCUIT” with CONSULT-III is detected when TCM cannot

communicate to other control units.

Possible Cause

INFOID:0000000005148530

Harness or connectors

(CAN communication line is open or shorted.)

DTC Confirmation Procedure

INFOID:0000000005148531

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-III

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

2. Select “DATA MONITOR” mode for “ENGINE” with CONSULT-III.

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

4. If DTC is detected, go to 

TM-40, "Diagnosis Procedure"

.

 WITH GST

Follow the procedure “WITH CONSULT-III”.

Diagnosis Procedure

INFOID:0000000005148532

1.

CHECK CAN COMMUNICATION CIRCUIT

With CONSULT-III

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

2. Select “SELF-DIAG RESULTS” mode for “TRANSMISSION” with CONSULT-III.
Is any malfunction of the “U1000” indicated?

YES

>> Go to LAN section. Refer to 

LAN-14, "Trouble Diagnosis Flow Chart"

.

NO

>> INSPECTION END

P0615 STARTER RELAY

TM-41

< COMPONENT DIAGNOSIS >

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P0615 STARTER RELAY

Description

INFOID:0000000005148533

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

CONSULT-III Reference Value in Data Monitor Mode

INFOID:0000000005148534

On Board Diagnosis Logic

INFOID:0000000005148535

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

• Diagnostic trouble code “P0615 STARTER RELAY” with CONSULT-III 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:0000000005148536

• Harness or connectors

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

• Sarter relay

DTC Confirmation Procedure

INFOID:0000000005148537

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-III

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

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

3. Start engine.

4. Drive vehicle for at least 2 consecutive seconds.

5. If DTC is detected, go to 

TM-41, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005148538

1.

CHECK STARTER RELAY

With CONSULT-III

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

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

and check monitor “STARTER RELAY” ON/OFF.

Without CONSULT-III

Item name

Condition 

Display value

STARTER RELAY

Selector lever in “N”,“P” position.

ON

Selector lever in other position.

OFF

Item name

Condition 

Display value

STARTER RELAY

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

ON

Selector lever in other positions.

OFF