Mazda 6. Manual - part 219

TROUBLESHOOTING 

K–117

K

NO.1 VEHICLE DOES NOT MOVE IN D, S, L RANGES, OR IN R POSITION

A6E568001030W05

Diagnostic procedure

End Of Sie

NO.2 VEHICLE MOVES IN N POSITION

A6E568001030W06

Diagnostic procedure

1

Vehicle does not move in D, S, L ranges, or in R position

DESCRIPTION

• Vehicle does not move when AP depressed.

POSSIBLE 

CAUSE

• If the vehicle does not move in D, S, L ranges or R position, basically, the malfunction is in the ATX. 

(Vehicle will move even with a malfunction in the PCM.) Since a malfunction is in the sensor circuit or 
output circuit is the cause of the malfunction in the ATX, inspect the sensors, output circuit, and the 
related harnesses.
1. Clutch slipped, worn (D, S, L ranges-Forward clutch, R position-Reverse clutch, Low and reverse 

brake)

• Line pressure low

• Shift solenoid D malfunction

• Shift solenoid E malfunction

• Shift solenoid A malfunction

• Shift solenoid B malfunction

• Pressure control solenoid malfunction

• Body GND malfunction

• Control valve body malfunction

2. Selector lever malfunction
3. Parking mechanism not properly operation
4. Torque converter malfunction

Note

• Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic 

and Automatic Transaxle Basic Inspection are conducted.

STEP

INSPECTION

ACTION

1

When vehicle is stopped on a flat, level road and 
engine is off, does vehicle move when pushed? 
(in D, S ranges or N, R positions and brake is 
released)

Yes

Go to next step.

No

Check for parking mechanism. (See ATX workshop manual 
(FN4A-EL) [1623-10-98E].) (See ATX workshop manual 
supplement (FN4A-EL) [1746-1*-02C].)

2

Disconnect PCM.
Is resistance between ground terminal at PCM 
connector and body ground less than 5.0 
ohms?

Yes

Go to next step.

No

Repair open ground circuit.

3

Check LPS PID value using WDS or equivalent.
Is LPS PID value okay? 
(See 

F–45 PCM INSPECTION

.)

Yes

Overhaul control valve body and repair or replace any 
defective parts. If problem remains, overhaul transaxle and 
repair or replace any defective parts. (See ATX workshop 
manual (FN4A-EL) [1623-10-98E].) (See ATX workshop 
manual supplement (FN4A-EL) [1746-1*-02C].)

No

Repair or replace any defective parts.

2

Vehicle moves in N position

DESCRIPTION

• Vehicle creeps in N position.

• Vehicle creeps if brake pedal is not depressed in N position.

POSSIBLE 

CAUSE

• If the vehicle moves in N position, basically, the malfunction is in the ATX. Since a malfunction in the 

sensor circuit or output circuit is the cause of the malfunction in the ATX, inspect the sensors, output 
circuit, and the related harnesses.
1. Clutch burned (Forward clutch)

• Control valve body malfunction

2. Selector lever position disparity (Although the selector indicator shows N position, hydraulic circuit 

shows D range or R position)

Note

• Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic 

and Automatic Transaxle Basic Inspection are conducted.

STEP

INSPECTION

ACTION

1

Does vehicle creep when selector lever is moved 
slightly in N position?

Yes

Go to next step.

No

Adjust selector lever. (See 

K–46–3 SELECTOR CABLE 

ADJUSTMENT

.)

K–118

TROUBLESHOOTING 

End Of Sie

NO.3 VEHICLE MOVES IN P POSITION, OR PARKING GEAR DOES NOT DISENGAGE WHEN P IS 
DISENGAGED

A6E568001030W07

End Of Sie

NO.4 EXCESSIVE CREEP

A6E568001030W08

End Of Sie

NO.5 NO CREEP AT ALL

A6E568001030W09

Diagnostic procedure

2

Disconnect PCM.
Is resistance between ground terminal at PCM 
connector and body ground less than 5.0 
ohms?

Yes

Go to next step.

No

Repair open ground circuit.
Reconnect PCM.

3

Check LPS PID value using WDS or equivalent.
Is LPS PID value okay?
(See 

F–45 PCM INSPECTION

.)

Yes

Overhaul control valve body and repair or replace any 
defective parts.
If problem remains, overhaul transaxle and repair or replace 
any defective parts.
(See ATX workshop manual (FN4A-EL) [1623-10-98E].) 
(See ATX workshop manual supplement (FN4A-EL)
 [1746-1*-02C].)

No

Repair or replace any defective parts.

STEP

INSPECTION

ACTION

3

Vehicle moves in P position, or parking gear does not disengage when P is disengaged

DESCRIPTION

• Vehicle rolls on a downward slope in P position.

• Tires are locked when P is disengaged. Vehicle does not move in D, S, L ranges, and R position when 

AP is depressed, and engine remains in stall condition.

POSSIBLE 

CAUSE

1. Parking mechanism malfunction (May have effect on noise or shock from transaxle)
2. Improper adjustment of selector lever
3. If vehicle moves in N position, perform No.2 "Vehicle moves in N position" 

4

Excessive creep

DESCRIPTION

• Vehicle accelerates in D, S, L ranges, and R position without depressing accelerator  pedal.

POSSIBLE 

CAUSE

1. Engine idle speed high (transaxle system is not cause of problem)
2. Go to No.7 “Fast idle/runs on” (See 

F–198 NO.7 SLOW RETURN TO IDLE

.)

5

No creep at all

DESCRIPTION

• Either the transaxle is stuck in 3GR position, or there is clutch circuit slippage 

POSSIBLE 

CAUSE

• Either transaxle is stuck in 3GR or 4GR position, or clutch circuit slippage due to a stuck 3–4 clutch is 

stuck.
1. Clutch burned

• Line pressure low

• Shift solenoid D malfunction

• Shift solenoid A malfunction

• Shift solenoid B malfunction

• Shift solenoid C malfunction

• Pressure control solenoid malfunction

• Body GND malfunction

• Control valve body malfunction

2. Transaxle fixed in 3GR (Operation of fail-safe function)

• Short or open circuit in wiring

• Poor connection of connector

• The electronic parts of output and input system is malfunction

3. The engine torque is not start

• Torque converter is malfunction

Note

• Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic 

and Automatic Transaxle Basic Inspection are conducted.

STEP

INSPECTION

ACTION

1

• Does vehicle creep in any range/position?

Yes

Go to next step.

No

Inspect or adjust selector lever.
(See 

K–46–3 SELECTOR LEVER REMOVAL/

INSTALLATION

.)

TROUBLESHOOTING 

K–119

K

End Of Sie

NO.6 LOW MAXIMUM SPEED AND POOR ACCELERATION

A6E568001030W10

Diagnostic procedure

2

Check the value at the following PID using the 
WDS or equivalent.
(See 

F–45 PCM INSPECTION

.)

• TP

Is PID value okay?

Yes

Go to next step.

No

Repair or replace any defective parts.

3

Disconnect PCM.
Is resistance between ground terminal at PCM 
connector and body ground less than 5.0 
ohms?

Yes

Go to next step.

No

Repair open ground circuit.

4

Check LPS PID value.
Is LPS PID value okay?
(See 

F–45 PCM INSPECTION

.)

Yes

Overhaul control valve body and repair or replace any 
defective parts.
If problem remains, overhaul transaxle and repair or replace 
any defective parts. (See ATX workshop manual (FN4A-EL) 
[1623-10-98E].) (See ATX workshop manual supplement 
(FN4A-EL) [1746-1*-02C].)

No

Repair or replace any defective parts.

STEP

INSPECTION

ACTION

6

Low maximum speed and poor acceleration

DESCRIPTION

• Vehicle acceleration is poor at start.

• Delayed acceleration when accelerator pedal is depressed while driving.

POSSIBLE 

CAUSE

• If the clutch is stuck or does not stay in 3GR, the malfunction is in engine circuit.

1. Clutch slipped, burned

• Line pressure low

• Shift solenoid D malfunction

• Shift solenoid E malfunction

• Shift solenoid A malfunction

• Shift solenoid B malfunction

• Shift solenoid C malfunction

• Pressure control solenoid malfunction

• Body GND malfunction

• Control valve body malfunction

2. Signal malfunction

• Vehicle speed sensor malfunction

• Sensor GND malfunction

• TP sensor malfunction

• Input/turbine speed sensor malfunction

3. Transaxle fixed in 3GR (Operation of fail-safe function)

• Short or open circuit in wiring

• Poor connection of connector

• The electronic parts of output and input system have malfunction

4. Insufficient starting torque (Suspected when in-gear condition, shift control and engine circuit are 

normal)

• The torque converter have malfunction (Poor operation, stuck)

5. Engagement of TCC operation range (Operation of fail-safe function)

• Transaxle fluid temperature sensor malfunction (Short or open circuit)

6. Transaxle fixed in HOLD mode

• HOLD switch malfunction

7. TR switch adjustment incorrect

Note

• Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic 

and Automatic Transaxle Basic Inspection are conducted.

STEP

INSPECTION

ACTION

1

With ignition switch at ON, does HOLD indicator 
light indication correspond to HOLD switch 
operation?

Yes

Go to next step.

No

Go to No.26 "HOLD INDICATOR LIGHT DOES NOT 
ILLUMINATE WHEN HOLD SWITCH IS TURNED ON.". 
No.27 "HOLD INDICATOR LIGHT ILLUMINATES WHEN 
HOLD SWITCH IS NOT TURNED ON."

2

Go to No.12 "Lack/loss of power".
(See 

F–207 NO.12 LACK/LOSS OF 

POWER-ACCELERATION/CRUISE

.) Does CIS 

system okay?

Yes

Go to next step.

No

Repair or replace any defective parts.

K–120

TROUBLESHOOTING 

End Of Sie

NO.7 NO SHIFTING

A6E568001030W11

End Of Sie

NO.8 DOES NOT SHIFT TO FOURTH GEAR (4GR)

A6E568001030W12

3

Disconnect solenoid connector.
Does vehicle operate as follows?

D, S ranges: 3GR (fixed) L range: 1GR (fixed) 

R position: Reverse

Yes

Go to next step.

No

Overhaul control valve body and repair or replace any 
defective parts. If problem remains, overhaul transaxle and 
repair or replace any defective  parts.
(See ATX workshop manual (FN4A-EL) [1623-10-98E].) 
(See ATX workshop manual supplement (FN4A-EL)
 [1746-1*-02C].)

4

Drive vehicle in D, S, and L ranges except HOLD 
mode. Does vehicle start from stop in first gear?

Yes

Go to next step.

No

Check the value at the following PIDs using the WDS or 
equivalent.
(See 

F–45 PCM INSPECTION

.)

• TP

• VSS

• TSS

• TR

Repair or replace any defective parts.

5

Check the value at the following PIDs using the 
WDS or equivalent. 
(See 

F–45 PCM INSPECTION

.)

• SSA/SS1

• SSB/SS2

• SSC/SS3

Are PID values okay?

Yes

Go to next step.

No

Check the value at the following PIDs using the NGS tester. 
(See 

F–45 PCM INSPECTION

.)

• TP

• VSS

• TSS

Repair or replace any defective parts.

6

Perform the stall test. (See 

K–7 Stall Test

.)

Is stall speed okay?

Yes

Reverify symptoms of malfunction.

No

Overhaul transaxle and repair or replace any defective 
parts. (See ATX workshop manual (FN4A-EL)
 [1623-10-98E].) (See ATX workshop manual supplement 
(FN4A-EL) [1746-1*-02C].)

STEP

INSPECTION

ACTION

7

No shifting

DESCRIPTION

• Single shift range only.

• Sometimes it shifts correctly.

POSSIBLE 

CAUSE

• When the gear position is fixed in 3GR due to the fail-safe operation, the malfunction is in the ATX.

• Perform malfunction diagnosis according to No.6 "Low maximum speed and poor acceleration".

1. Clutch slippage, burned

• Line pressure low

• Shift solenoid D malfunction

• Shift solenoid E malfunction

• Shift solenoid A malfunction

• Shift solenoid B malfunction

• Shift solenoid C malfunction

• Pressure control solenoid malfunction

• Body GND malfunction

• Control valve body malfunction

2. Signal malfunction

• Vehicle speed sensor malfunction

• Sensor GND malfunction

• TP sensor malfunction

• Input/turbine speed sensor malfunction

3. Transaxle fixed in 3GR (Operation in fail-safe function)

• Short or open circuit in wiring

• Poor connection of connector

• Disconnected shift solenoid connector

• Poor ground of shift solenoid

4. Transaxle fixed in HOLD mode

• HOLD switch malfunction

8

Does not shift to fourth gear (4GR)

DESCRIPTION

• Vehicle does not upshift from 3GR to 4GR even though vehicle speed increased.

• Vehicle does not shift to 4GR even though accelerator pedal is released in D range at 60 km/h {37 

mph}.