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Home >> Infiniti >> 2018 >> Q70 5.6 Luxe, RWD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission (Symptom Diagnosis & Removal And Installation) (Except Hybrid) >> Symptom Diagnosis >> System Symptom >> Symptom Table >> Symptom Table 1

Symptom Table 1

Symptom

Diagnostic item

Control linkage

Output speed sensor

Vehicle speed signal

Accelerator pedal position sensor

Engine speed signal

Input speed sensor

A/T fluid temperature sensor

Battery voltage

Transmission range switch

Manual mode switch

Stop lamp switch

Line pressure solenoid valve

Torque converter solenoid valve

Low brake solenoid valve

Front brake solenoid valve

High and low reverse clutch solenoid valve

Input clutch solenoid valve

Direct clutch solenoid valve

2346 brake solenoid valve

Anti-interlock solenoid valve

Starter relay

CAN communication

Inspection and Adjustment

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

Diagnosis Procedure

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

Poor performance

Driving performance

Shift point is high in "D" position.

1

2

3

Shift point is low in "D" position.

1

2

Large shock

When shifting gears

→ "D" position

4

7

6

6

5

3

2

3

1

→"R" position

4

7

6

6

5

3

2

1

1GR ↔ 2GR

4

2

5

4

4

3

1

2GR ↔ 3GR

4

2

5

4

4

3

1

3GR ↔ 4GR

4

2

5

4

4

3

3

1

4GR ↔ 5GR

4

2

5

4

4

3

3

1

5GR ↔ 6GR

4

2

5

4

4

3

3

1

6GR ↔ 7GR

4

2

5

4

4

3

3

1

Downshift when accelerator pedal is depressed

3

2

4

3

3

1

Upshift when accelerator pedal is released

3

2

4

3

3

1

Lock-up

4

2

4

4

4

3

1

Judder

Lock-up

2

1

1

4

3

Strange noise

In "R" position

2

1

In "N" position

2

1

In "D" position

2

1

Engine at idle

2

1

Symptom

Diagnostic item

Control linkage

Output speed sensor

Vehicle speed signal

Accelerator pedal position sensor

Engine speed signal

Input speed sensor

A/T fluid temperature sensor

Battery voltage

Transmission range switch

Manual mode switch

Stop lamp switch

Line pressure solenoid valve

Torque converter solenoid valve

Low brake solenoid valve

Front brake solenoid valve

High and low reverse clutch solenoid valve

Input clutch solenoid valve

Direct clutch solenoid valve

2346 brake solenoid valve

Anti-interlock solenoid valve

Starter relay

CAN communication

Inspection and Adjustment

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

Diagnosis Procedure

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

Function trouble

Gear does no change

"D" position

Locks in 1GR

1

1

1

1

Locks in 2GR

Locks in 3GR

Locks in 4GR

Locks in 5GR

1

Locks in 6GR

Locks in 7GR

1GR → 2GR

1

1

1

1

2GR → 3GR

1

3GR → 4GR

2

2

2

2

2

2

2

1

4GR → 5GR

1

1

5GR → 6GR

1

6GR → 7GR

1

1

1

1

1

5GR → 4GR

1

4GR → 3GR

1

1

1

3GR → 2GR

1

1

2GR → 1GR

1

1

1

Does not lock-up

2

2

2

2

4

5

3

2

2

2

2

2

2

2

2

2

1

"M" position

1GR ↔ 2GR

3

3

3

3

2

3

3

3

3

3

3

3

3

3

1

2GR ↔ 3GR

3

3

3

3

2

3

3

3

3

3

3

3

3

3

1

3GR ↔ 4GR

3

3

3

3

2

3

3

3

3

3

3

3

3

3

1

4GR ↔ 5GR

3

3

3

3

2

3

3

3

3

3

3

3

3

3

1

5GR ↔ 6GR

3

3

3

3

2

3

3

3

3

3

3

3

3

3

1

6GR ↔ 7GR

3

3

3

3

2

3

3

3

3

3

3

3

3

3

1

Symptom

Diagnostic item

Control linkage

Output speed sensor

Vehicle speed signal

Accelerator pedal position sensor

Engine speed signal

Input speed sensor

A/T fluid temperature sensor

Battery voltage

Transmission range switch

Manual mode switch

Stop lamp switch

Line pressure solenoid valve

Torque converter clutch solenoid valve

Low brake solenoid valve

Front brake solenoid valve

High and low reverse clutch solenoid valve

Input clutch solenoid valve

Direct clutch solenoid valve

2346 brake solenoid valve

Anti-interlock solenoid valve

Starter relay

CAN communication

Inspection and Adjustment

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

Diagnosis Procedure

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

Function trouble

Poor shifting

Slip

When shifting gears

1GR ↔ 2GR

3

3

3

4

2

2

1

2GR ↔ 3GR

3

3

3

4

2

2

1

3GR ↔ 4GR

3

3

3

4

2

2

2

2

1

4GR ↔ 5GR

3

3

3

4

2

2

2

1

5GR ↔ 6GR

3

3

3

4

2

2

2

1

6GR ↔ 7GR

3

3

3

4

2

2

2

1

Engine brake does not work

"D" position → "M" position

5

5

5

6

4

2

3

3

3

1

"M" position

7GR → 6GR

5

5

5

6

4

2

3

3

3

1

6GR → 5GR

5

5

5

6

4

2

3

3

3

1

5GR → 4GR

5

5

5

6

4

2

3

3

3

1

4GR → 3GR

5

5

5

6

4

2

3

3

3

3

1

3GR → 2GR

5

5

5

6

4

2

3

3

3

1

2GR → 1GR

5

5

5

6

4

2

3

3

3

1

Function trouble

Poor power transmission

Slip

With selector lever in "D" position, acceleration is extremely poor.

5

3

3

3

4

2

2

2

1

With selector lever in "R" position, acceleration is extremely poor.

5

3

3

3

4

2

2

2

1

While starting off by accelerating in 1GR, engine races.

3

3

3

4

2

2

2

1

While accelerating in 2GR, engine races.

3

3

3

4

2

2

2

2

1

While accelerating in 3GR, engine races.

3

3

3

4

2

2

2

2

1

While accelerating in 4GR, engine races.

3

3

3

4

2

2

2

2

1

While accelerating in 5GR, engine races.

3

3

3

4

2

2

2

2

2

1

While accelerating in 6GR, engine races.

3

3

3

4

2

2

2

2

2

1

While accelerating in 7GR, engine races.

3

3

3

4

2

2

2

2

2

1

Lock-up

3

3

3

4

2

2

1

No creep at all.

1

1

1

1

1

1

1

1

1

Extremely large creep.

1

Symptom

Diagnostic item

Control linkage

Output speed sensor

Vehicle speed signal

Accelerator pedal position sensor

Engine speed signal

Input speed sensor

A/T fluid temperature sensor

Battery voltage

Transmission range switch

Manual mode switch

Stop lamp switch

Line pressure solenoid valve

Torque converter clutch solenoid valve

Low brake solenoid valve

Front brake solenoid valve

High and low reverse clutch solenoid valve

Input clutch solenoid valve

Direct clutch solenoid valve

2346 brake solenoid valve

Anti-interlock solenoid valve

Starter relay

CAN communication

Inspection and Adjustment

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

Diagnosis Procedure

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

DTC Logic

Function trouble

Power transmission cannot be performed

Vehicle cannot run in all position.

3

2

1

1

1

1

1

1

1

1

1

Driving is not possible in "D" position.

3

2

1

1

1

1

1

1

1

1

1

Driving is not possible in "R" position.

3

2

1

1

1

Engine stall

4

5

5

6

3

2

1

Engine stalls when selector lever shifted "N" → "D" or "R".

4

5

5

3

2

1

Engine does not start in "N" or "P" position.

3

1

2

1

Engine starts in position other than "N" or "P".

3

2

1

Poor operation

Vehicle does not enter parking condition.

1

2

Parking condition is not cancelled.

1

2

Vehicle runs with A/T in "P" position.

1

2

Vehicle moves forward with the "R" position.

1

2

Vehicle runs with A/T in "N" position.

1

2

Vehicle moves backward with the "D" position.

1

2
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