Mazda CX 7. Manual - part 232

ON-BOARD DIAGNOSTIC [AW6A-EL, AW6AX-EL]

05-02–37

05-02

3

INSPECT VOLTAGE OF STARTER RELAY NO.2 
CIRCUIT

• Turn the ignition switch to the ON position 

(engine off).

• Shift the selector lever to P or N position.

• Inspect for voltage TCM connector terminal A5 

(wiring harness-side).

• Is the voltage 0 V?

Yes

Go to go to Step 5.

No

Go to the next step.

4

INSPECT TCM CONNECTOR FOR POOR 
CONNECTION

• Disconnect the TCM connector.

• Inspect for poor connection (such as damaged/

pulled-out pins, corrosion).

• Are terminals normal?

Yes

Go to Step 12.

No

Replace the couple component, then go to Step 12.

5

INSPECT VOLTAGE OF STARTER RELAY NO.2 
CIRCUIT

• Shift the selector lever to D range or R position.

• Inspect for voltage TCM connector terminal A5 

(wiring harness-side).

• Is the voltage B+?

Yes

Go to go to Step 12.

No

Go to the next step.

6

INSPECT VOLTAGE OF STARTER RELAY NO.2 
TERMINAL E

• Inspect for voltage starter relay No.2 terminal E 

(wiring harness-side).

• Is the voltage B+?

Yes

Go to the next step.

No

Repair or replace the wiring harness, then go to Step 12.

7

INSPECT STARTER RELAY NO.2 FOR POOR 
CONNECTION

• Turn the ignition switch to the LOCK position.

• Disconnect the starter relay No.2 connector.

• Inspect for poor connection (such as damaged/

pulled-out pins, corrosion).

• Are terminals normal?

Yes

Go to the next step.

No

Replace the couple component, then go to Step 12.

8

INSPECT STARTER RELAY NO.2

• Inspect the starter relay No.2.

(See 09-21-4 RELAY INSPECTION)

• Is the relay normal?

Yes

Go to the next step.

No

Replace the starter relay No.2, then go to Step 12.

9

INSPECT STARTER RELAY NO.2 CIRCUIT FOR 
OPEN CIRCUIT

• Inspect for continuity between TCM connector 

terminal A5 and starter relay No.2 terminal A 
(wiring harness-side).

• Is there continuity?

Yes

Go to the next step.

No

Repair or replace the harness, then go to Step 12.

10

INSPECT STARTER RELAY NO.2 CIRCUIT FOR 
SHORT TO GROUND

• Inspect for continuity between starter relay 

No.2 terminal A (wiring harness-side) and body 
ground.

• Is there continuity?

Yes

Repair or replace the harness, then go to Step 12.

No

Go to the next step.

11

INSPECT STARTER RELAY NO.2 CIRCUIT FOR 
SHORT TO POWER

• Turn the ignition switch to the ON position 

(engine off).

• Inspect the voltage at starter relay No.2 

terminal A (wiring harness-side).

• Is the voltage 0 V?

Yes

Go to the next step.

No

Repair or replace the wiring harness, then go to Step 12.

12

VERIFY TROUBLESHOOTING OF DTC P0817 
COMPLETED

• Make sure to reconnect all the disconnected 

connectors.

• Clear the DTC from the memory using the M-

MDS.

• Drive the vehicle in D range.

• Is same DTC present?

Yes

Replace the TCM, then go to the next step.
 (See 05-17-25 TCM REMOVAL/INSTALLATION[AW6A-EL, 
AW6AX-EL].)

No

Go to the next step.

STEP

INSPECTION

ACTION

1871-1U-06B(05-02).fm  37 ページ  ２００６年３月１５日　水曜日　午前１１時１８分

ON-BOARD DIAGNOSTIC [AW6A-EL, AW6AX-EL]

05-02–38

End Of Sie

DTC P0819[AW6A-EL, AW6AX-EL]

id050211802700

13

VERIFY AFTER REPAIR PROCEDURE

• Perform the “After Repair Procedure”.

 (See 05-02-4 AFTER REPAIR 
PROCEDURE[AW6A-EL, AW6AX-EL].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.
 (See 05-02-5 DTC TABLE[AW6A-EL, AW6AX-EL].)

No

DTC troubleshooting completed.

STEP

INSPECTION

ACTION

DTC P0819

Manual switch/up switch/down switch circuit malfunction (open circuit/short circuit)

DETECTION 

CONDITION

• Any of the following conditions are detected for 10 s or more when engine is running:

— 5 V detected at TCM terminals A7 when in any position except D or M range.

— 0 V detected at TCM terminal A7 when 5 V are input to TCM terminal A3 or A4.

Diagnostic support note:

• The MIL does not illuminate if the TCM detects the above malfunction condition during the first drive cycle.

• A PENDING CODE is not available.

• FREEZE FRAME DATA is available.

• The AT warning light illuminates.

• The DTC is stored in the TCM memory.

POSSIBLE 

CAUSE

• M range switch malfunction

• Up switch malfunction

• Down switch malfunction.

• Open circuit in wiring harness between selector lever component terminal A and TCM terminal A3

• Open circuit in wiring harness between selector lever component terminal B and TCM terminal A4

• Open circuit in wiring harness between selector lever component terminal C and TCM terminal A7

• Open circuit in wiring harness between selector lever component terminal D and ground

• Short to ground in wiring harness between selector lever component terminal A and TCM terminal A3

• Short to ground in wiring harness between selector lever component terminal B and TCM terminal A4

• Short to ground in wiring harness between selector lever component terminal C and TCM terminal A7

• Damaged connector between selector lever component and TCM

• TCM malfunction

A

A3

SELECTOR LEVER COMPONENT 

WIRING HARNESS-SIDE CONNECTOR

TCM

SELECTOR LEVER 
COMPONENT

M RANGE 
SWITCH

UP 
SWITCH

DOWN 
SWITCH

B

C

D

A4

A7

A

B

C

D

4

3

5

4

3

5

4

3

5

6

7

9

8

A7

A4

A3

5

6

9

6

9

TCM WIRING HARNESS-SIDE CONNECTOR 

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ON-BOARD DIAGNOSTIC [AW6A-EL, AW6AX-EL]

05-02–39

05-02

Diagnostic procedure

STEP

INSPECTION

ACTION

1

VERIFY FREEZE FRAME DATA HAS BEEN 
RECORDED

• Has the FREEZE FRAME DATA been 

recorded?

Yes

Go to the next step.

No

Record the FREEZE FRAME DATA on the repair order, 
then go to the next step.

2

VERIFY RELATED REPAIR INFORMATION 
AVAILABILITY

• Verify related Service Bulletins and/or on-line 

repair information availability.

• Is any related repair information available?

Yes

Perform repair or diagnosis according to the available 
repair information.

• If the vehicle is not repaired, go to the next step.

No

Go to the next step.

3

INSPECT VOLTAGE OF M RANGE SWITCH, UP 
SWITCH, AND DOWN SWITCH CIRCUIT

• Turn the ignition switch to the ON position. 

(engine off)

• Shift the selector lever to any except M range.

• Inspect for voltage between TCM connector 

terminals (wiring harness-side)

— Terminal A7 and ground (M range switch)

— Terminal A3 and ground (up switch)

— Terminal A4 and ground (down switch)

• Is the voltage B+?

Yes

Go to go to Step 10.

No

Go to the next step.

4

INSPECT TCM CONNECTOR FOR POOR 
CONNECTION

• Disconnect the TCM connector.

• Inspect for poor connection (such as damaged/

pulled-out pins, corrosion).

• Are terminals normal?

Yes

Go to the next step.

No

Replace the couple component, then go to Step 10.

5

INSPECT SELECTOR LEVER COMPONENT 
FOR POOR CONNECTION

• Disconnect the selector lever component 

connector.

• Inspect for poor connection (such as damaged/

pulled-out pins, corrosion).

• Are terminals normal?

Yes

Go to the next step.

No

Replace the couple component, then go to Step 10.

6

INSPECT M RANGE SWITCH, UP SWITCH, AND 
DOWN SWITCH CIRCUIT FOR SHORT TO 
GROUND

• Inspect for continuity between selector lever 

component terminals (wiring harness-side) and 
body ground.

— Terminal C and body ground (M range 

switch)

— Terminal A and body ground (up switch)

— Terminal B and body ground (down switch)

• Is there continuity?

Yes

Repair or replace the harness, then go to Step 10.

No

Go to the next step.

7

INSPECT M RANGE SWITCH, UP SWITCH, AND 
DOWN SWITCH

• Inspect the M range switch, up switch, and 

down switch.
(See 05-18-6 SELECTOR LEVER 
COMPONENT INSPECTION)

• Are the switches normal?

Yes

Go to the next step.

No

Replace the selector lever, then go to Step 10.
(See 05-18-7 SELECTOR LEVER COMPONENT 
REMOVAL/INSTALLATION.)

8

INSPECT M RANGE SWITCH, UP SWITCH, AND 
DOWN SWITCH CIRCUIT FOR OPEN CIRCUIT

• Inspect for continuity between selector lever 

component terminal D (wiring harness-side) 
and body ground.

• Is there continuity?

Yes

Go to the next step.

No

Repair or replace the harness, then go to Step 10.

1871-1U-06B(05-02).fm  39 ページ  ２００６年３月１５日　水曜日　午前１１時１８分

ON-BOARD DIAGNOSTIC [AW6A-EL, AW6AX-EL]

05-02–40

End Of Sie

DTC P0882[AW6A-EL, AW6AX-EL]

id050211802800

9

INSPECT M RANGE SWITCH, UP SWITCH, AND 
DOWN SWITCH CIRCUIT FOR OPEN CIRCUIT

• Inspect for continuity between TCM connector 

terminals and selector lever component 
terminals (wiring harness-side).

— Terminal A7 and terminal C (M range switch)

— Terminal A3 and terminal A (up switch)

— Terminal A4 and terminal B (down switch)

• Is there continuity?

Yes

Go to the next step.

No

Repair or replace the harness, then go to the next step.

10

VERIFY TROUBLESHOOTING OF DTC P0819 
COMPLETED

• Make sure to reconnect all the disconnected 

connectors.

• Clear the DTC from the memory using the M-

MDS.

• Drive the vehicle in M range, and change gears 

by shifting the selector lever (operating the up 
and down switches).

• Is same DTC present?

Yes

Replace the TCM, then go to the next step.
 (See 05-17-25 TCM REMOVAL/INSTALLATION[AW6A-EL, 
AW6AX-EL].)

No

Go to the next step.

11

VERIFY AFTER REPAIR PROCEDURE

• Perform the “After Repair Procedure”.

 (See 05-02-4 AFTER REPAIR 
PROCEDURE[AW6A-EL, AW6AX-EL].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.
 (See 05-02-5 DTC TABLE[AW6A-EL, AW6AX-EL].)

No

DTC troubleshooting completed.

STEP

INSPECTION

ACTION

DTC P0882

TCM B+ low

DETECTION 

CONDITION

• Voltage of less than 9 V detected at TCM terminals A1 and A11 when engine is running.

Diagnostic support note:

• This is a continuous monitor (CCM).

• The MIL does not illuminate if the TCM detects the above malfunction condition during the first drive cycle.

• A PENDING CODE is not available.

• FREEZE FRAME DATA is available.

• The AT warning light not illuminates.

• The DTC is stored in the TCM memory.

POSSIBLE 

CAUSE

• Melted METER IG 15 A fuse

• Melted TCM 10 A fuse

• Open circuit in wiring harness between TCM 10 A fuse and TCM terminal A1

• Open circuit in wiring harness between METER IG 15 A fuse and TCM terminal A11

• Open circuit in wiring harness between TCM terminal A9 and body ground

• Short to ground in wiring harness between TCM 10 A fuse and TCM terminal A1

• Short to ground in wiring harness between ROOM 15 A fuse and TCM terminal A11

• Poor connection of TCM connector

• TCM malfunction

TCM

A1

3

IG1

B+

A11

METER IG 15 A 
FUSE

TCM 10 A 
FUSE

A9

8

5

3

6

A1

A11

A9

7

7

4

7

4

5 6

TCM WIRING HARNESS-

SIDE CONNECTOR 

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