Mazda Protege 5. Manual - part 226

ON-BOARD DIAGNOSTIC 

05–02–32

DTC P0741

A3U050201030W16

Diagnostic procedure

DTC P0741

Torque converter clutch (TCC) stuck OFF

DETECTION 

CONDITION

•

When all conditions below satisfied.
— ATF temperature 20 

°°°°

C {68 

°°°°

F} or above.

— Driving in 4GR at D range.
— Engine run.
— Turbine speed within 225—4,988 rpm.
— Vehicle speed within 60—100 km/h {37—62 mph}.
— TCC operation
— Shift solenoid A duty value exceeds 99%
— Power or normal mode
— Difference between engine speed and turbine speed more than 100 rpm
— Any of the following not generated: DTC P0500, P0705, P0706, P0710, P0715, P0751, P0752, P0753, 

P0756, P0757, P0758, P0761, P0762, P0763, P0766, P0767, P0768, P0771, P0772, P0773.

Diagnostic support note:

•

This is a continuous monitor (CCM).

•

MIL does not illuminate if PCM detects the above malfunction conditions during first drive cycle.

•

PENDING CODE is not available.

•

FREEZE FRAME DATA is not available.

•

O/D OFF indicator light flashes.

•

DTC is stored in the PCM memory.

POSSIBLE 

CAUSE

•

ATF level low

•

Deteriorated ATF

•

Shift solenoids A, B, C, D, E, and pressure control solenoid stuck

•

Line pressure low

•

2-4 brake band slipping

•

3-4 clutch slipping

•

Control valve stuck.

•

PCM malfunction

STEP

INSPECTION

ACTION

1

VERIFY RELATED REPAIR INFORMATION 
AVAILABILITY

•

Check for related Service Bulletins availability.

•

Is any related repair information available?

Yes Perform repair or diagnosis according to available repair 

information.

•

If vehicle is not repaired, go to next step.

No

Go to next step.

2

CHECK ATF CONDITION

•

Turn ignition key to OFF.

•

Check ATF condition.
— Clear red: Normal
— Milky: Water mixed in fluid
— Reddish brown: Deteriorated ATF

•

Is it okay?

(See 05–17–17 Automatic Transaxle Fluid (ATF) 
Condition Inspection.)

Yes Go to next step.

No

If ATF color milky or reddish brown, replace ATF, then go to 
Step 4.
(See 05–17–18 AUTOMATIC TRANSAXLE FLUID (ATF) 
REPLACEMENT.)

3

CHECK ATF LEVEL

•

Start engine.

•

Warm up ATX.

•

Is ATF level within specification?

(See 05–17–18 Automatic Transaxle Fluid (ATF) 
Level Inspection.)

Yes Go to next step.

No

Adjust ATF level, then go to Step 6.
(See 05–17–18 Automatic Transaxle Fluid (ATF) Level 
Inspection.)

4

INSPECT LINE PRESSURE

•

Start engine.

•

Measure line pressure.

Specification
FS engine
Idle: 330—470 kPa {3.4—4.7 kgf/cm

2

, 49—66 

psi}
Stall: 1,160—1,320 kPa {11.9—13.4 kgf/cm

2

, 

170—190 psi}
ZM engine
Idle: 330—470 kPa {3.4—4.7 kgf/cm

2

, 49—66 

psi}
Stall: 1,200—1,360 kPa {12.3—13.8 kgf/cm

2

, 

175—169 psi}

•

Is line pressure within specification?

(See 05–17–12 Line Pressure Test.)

Yes Go to next step.

No

•

All ranges: Replace oil pump or control valve body, then 
go to Step 6.

•

Any ranges: Replace ATX, then go to Step 6.

(See 05–17–31 AUTOMATIC TRANSAXLE (ATX) 
REMOVAL/INSTALLATION.)
(See ATX Workshop Manual FN4A-EL (9999-95-FN4A-
99).)

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ON-BOARD DIAGNOSTIC 

05–02–33

05–02

End Of Sie

DTC P0742

A3U050201030W17

5

CHECK OPERATION OF EACH VALVE AND 
EACH SPRING

•

Turn ignition key to OFF.

•

Remove control valve body.

•

Disassemble control valve body.

•

Is each valve operation okay and is return 
spring okay?

(See 05–17–36 CONTROL VALVE BODY 
REMOVAL/INSTALLATION.)
(See ATX Workshop Manual FN4A-EL (9999-95-
FN4A-99).)

Yes Replace ATX, then go to next step

(See ATX Workshop Manual FN4A-EL (9999-95-FN4A-
99).)

No

Repair or replace shift valve and return spring, then go to 
next step.
(See 05–17–36 CONTROL VALVE BODY REMOVAL/
INSTALLATION.)
(See ATX Workshop Manual FN4A-EL (9999-95-FN4A-
99).)

6

VERIFY TROUBLESHOOTING OF DTC P0741 
COMPLETED

•

Make sure to reconnect all disconnected 
connectors.

•

Clear DTC from memory using WDS or 
equivalent.

•

Start engine.

•

Warm up engine and ATX.

•

Drive vehicle under following conditions for 15 
seconds or more.
— ATF temperature: 20 

°°°°

C {68 

°°°°

F} or above

— Drive in D range, 4th gear (TCC operation)
— Vehicle speed (VSS PID): within 60—100 

km/h {37—62 mph}

•

Are any DTCs present?

Yes Replace PCM, then go to next step.

(See 01–40A–7 PCM REMOVAL/INSTALLATION [ZM].)
(See 01–40B–7 PCM REMOVAL/INSTALLATION [FS].)

No

Go to next step.

7

VERIFY AFTER REPAIR PROCEDURE

•

Perform “After Repair Procedure”.

(See 05–02–6 AFTER REPAIR PROCEDURE.)

•

Are any DTCs present?

Yes Go to applicable DTC inspection.

No

Troubleshooting completed.

STEP

INSPECTION

ACTION

DTC P0742

Torque converter clutch (TCC) stuck ON

DETECTION 

CONDITION

•

All of following conditions satisfied under each of following throttle conditions.
— ATF temperature 20 

°°°°

C {68 

°°°°

F} or above.

— Driving in 4GR at D range.
— Engine run.
— Turbine speed within 225—4,988 rpm.
— Vehicle speed below 70 km/h {43 mph}.
— Torque converter clutch (TCC) no operation
— Difference between engine speed and turbine speed below 50 rpm
— DTC P0734 not output

•

Throttle conditions.
— FS engine

•

Throttle opening angle (TP PID) above 6.25% and 10 seconds or more have passed.

•

Throttle opening angle (TP PID) within 3.13—6.25% and 3 seconds or more have passed.

•

Throttle opening angle at closed throttle position and 10 seconds or more have passed.

—  ZM engine

•

Throttle opening angle (TP PID) above 7.03% and 10 seconds or more have passed.

•

Throttle opening angle (TP PID) within 1.56—7.03% and 3 seconds or more have passed.

•

Throttle opening angle at closed throttle position and 10 seconds or more have passed.

Diagnostic support note:

•

This is a continuous monitor (CCM).

•

MIL does not illuminate if PCM detects the above malfunction conditions during first drive cycle.

•

PENDING CODE is not available.

•

FREEZE FRAME DATA is not available.

•

O/D OFF indicator light flashes.

•

DTC is stored in the PCM memory.

POSSIBLE 

CAUSE

•

ATF level low

•

Deteriorated ATF

•

Shift solenoids A, B, C, D, E, and pressure control solenoid stuck

•

Line pressure low

•

2-4 brake band slipping

•

3-4 clutch slipping

•

Control valve stuck

•

PCM malfunction

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ON-BOARD DIAGNOSTIC 

05–02–34

Diagnostic procedure

STEP

INSPECTION

ACTION

1

VERIFY RELATED REPAIR INFORMATION 
AVAILABILITY

•

Check for related Service Bulletins availability.

•

Is any related repair information available?

Yes Perform repair or diagnosis according to available repair 

information.

•

If vehicle is not repaired, go to next step.

No

Go to next step.

2

CHECK ATF CONDITION

•

Turn ignition key to OFF.

•

Check ATF condition.
— Clear red: Normal
— Milky: Water mixed in fluid
— Reddish brown: Deteriorated ATF

•

Is it okay?

(See 05–17–17 Automatic Transaxle Fluid (ATF) 
Condition Inspection.)

Yes Go to next step.

No

If ATF color milky or reddish brown, replace ATF, then go to 
Step 4.
(See 05–17–18 AUTOMATIC TRANSAXLE FLUID (ATF) 
REPLACEMENT.)

3

CHECK ATF LEVEL

•

Start engine.

•

Warm up ATX.

•

Is ATF level within specification?

(See 05–17–18 Automatic Transaxle Fluid (ATF) 
Level Inspection.)

Yes Go to next step.

No

Adjust ATF level, then go to Step 6.
(See 05–17–18 Automatic Transaxle Fluid (ATF) Level 
Inspection.)

4

INSPECT LINE PRESSURE

•

Start engine.

•

Measure line pressure.

Specification
FS engine
Idle: 330—470 kPa {3.4—4.7 kgf/cm

2

, 49—66 

psi}
Stall: 1,160—1,320 kPa {11.9—13.4 kgf/cm

2

, 

170—190 psi}
ZM engine
Idle: 330—470 kPa {3.4—4.7 kgf/cm

2

, 49—66 

psi}
Stall: 1,200—1,360 kPa {12.3—13.8 kgf/cm

2

, 

175—196 psi}

•

Is line pressure within specification?

(See 05–17–12 Line Pressure Test.)

Yes Go to next step.

No

•

All ranges: Replace oil pump or control valve body, then 
go to Step 6.

•

Any ranges: Replace ATX, then go to Step 6.

(See 05–17–31 AUTOMATIC TRANSAXLE (ATX) 
REMOVAL/INSTALLATION.)
(See ATX Workshop Manual FN4A-EL (9999-95-FN4A-
99).)

5

CHECK OPERATION OF EACH VALVE AND 
EACH SPRING

•

Turn ignition key to OFF.

•

Remove control valve body.

•

Disassemble control valve body.

•

Is each valve operation okay and is return 
spring okay?

(See 05–17–36 CONTROL VALVE BODY 
REMOVAL/INSTALLATION.)
(See ATX Workshop Manual FN4A-EL (9999-95-
FN4A-99).)

Yes Replace ATX, then go to next step

(See ATX Workshop Manual FN4A-EL (9999-95-FN4A-
99).)

No

Repair or replace shift valve and return spring, then go to 
next step.
(See 05–17–36 CONTROL VALVE BODY REMOVAL/
INSTALLATION.)
(See ATX Workshop Manual FN4A-EL (9999-95-FN4A-
99).)

1712-1U-01G(05-02).fm  34 ページ  ２００１年６月２９日 金曜日 午後４時３５分

ON-BOARD DIAGNOSTIC 

05–02–35

05–02

End Of Sie

6

VERIFY TROUBLESHOOTING OF DTC P0742 
COMPLETED

•

Make sure to reconnect all disconnected 
connectors.

•

Clear DTC from memory using WDS or 
equivalent.

•

Start engine.

•

Warm up engine and ATX.

•

Drive vehicle under following.
— ATF temperature: 20 

°°°°

C {68 

°°°°

F} or above

— Drive in D range, 4th gear (TCC operation)
— Vehicle speed: below 70 km/h {43 mph}.

•

Throttle conditions
— FS engine

•

Throttle opening angle (TP PID) above 
6.25% and 10 seconds or more have 
passed.

•

Throttle opening angle (TP PID) within 
3.13—6.25% and 3 seconds or more 
have passed.

•

Throttle opening angle at closed throttle 
position and 10 seconds or more have 
passed.

— ZM engine

•

Throttle opening angle (TP PID) 7.03% 
and 10 seconds or more have passed.

•

Throttle opening angle (TP PID) within 
1.56—7.03% and 3 seconds or more 
have passed.

•

Throttle opening angle at closed throttle 
position and 10 seconds or more have 
passed.

•

Are any DTCs present?

Yes Replace PCM, then go to next step.

(See 01–40A–7 PCM REMOVAL/INSTALLATION [ZM].)
(See 01–40B–7 PCM REMOVAL/INSTALLATION [FS].)

No

Go to next step.

7

VERIFY AFTER REPAIR PROCEDURE

•

Perform “After Repair Procedure”.

(See 05–02–6 AFTER REPAIR PROCEDURE.)

•

Are any DTCs present?

Yes Go to applicable DTC inspection.

No

Troubleshooting completed.

STEP

INSPECTION

ACTION

1712-1U-01G(05-02).fm  35 ページ  ２００１年６月２９日 金曜日 午後４時３５分