Mazda 6. Manual — part 309

S–130

TROUBLESHOOTING [KEYLESS ENTRY SYSTEM]

End Of Sie

ON-BOARD DIAGNOSTIC FUNCTION

A6E778269000W04

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3

• Did customer use keyless entry system in

particular area, such as being near TV
towers, power plants, power lines, or
factories?

Yes

Attempt to lock/unlock doors with transmitter in
non-interference area.

If system operates:

• Area of operation is bad. Explain effect of outside

interference on transmitter to customer.

If system does not operate:

• Go to next step.

No

Go to next step.

4

• Are any of the following after-market

electrical parts on the vehicle?
— Cellular phone
— Radio-wave equipment
— Remote engine starter
— TV, etc.

Yes

Disconnect after-market electrical part connectors and
attempt to lock/unlock doors with transmitter.

If system operates:

• After-market electrical parts are interfering with keyless

entry system.

If system does not operate:

• Go to next step.

No

Go to next step.

5

• Perform on-board diagnostic function.

(See

S–130 ON-BOARD DIAGNOSTIC

FUNCTION

.)

• Does on-board diagnostic function work?

Yes

Go to next step.

No

• Go to Step 1 of NO. 1 ONE OR MORE ON-BOARD

DIAGNOSTIC FUNCTIONS INOPERATIVE.

• Go to Step 1 of NO. 2 ALL ON-BOARD DIAGNOSTIC

FUNCTIONS INOPERATIVE.

6

• Attempt to reprogram transmitter ID code.

• Can transmitter ID code be reprogrammed?

Yes

System is normal now.

No

Go to Step 1 of troubleshooting NO. 3 TRANSMITTER ID
CODE CANNOT BE REPROGRAMMED.

STEP

INSPECTION

ACTION

A6E7782W003

TROUBLESHOOTING [KEYLESS ENTRY SYSTEM]

S–131

S

TROUBLESHOOTING INDEX

A6E778269000W05

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NO. 1 ONE OR MORE ON-BOARD DIAGNOSTIC FUNCTIONS INOPERATIVE

A6E778269000W06

• When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while

doing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions. If
there is a problem, check to make sure connectors, terminals and wiring harnesses are connected correctly
and undamaged.

Diagnostic procedure

Note

• For with theft-deterrent system, follow the procedure from Step 4.

No.

TROUBLESHOOTING ITEM

DESCRIPTION

PAGE

1

One or more on-board
diagnostic functions inoperative.

• Malfunction in hazard warning light system

(except vehicle with theft-deterrent system), or
door lock linkage system, driver’s door key
cylinder switch system.

(See

S–131 NO. 1 ONE OR

MORE ON-BOARD DIAGNOSTIC
FUNCTIONS INOPERATIVE

)

2

All on-board diagnostic
functions inoperative.

• Malfunction in door lock timer unit power

supply circuit, door switch circuit, cargo
compartment light circuit or door lock timer
unit ground circuit.

(See

S–132 NO. 2 ALL

ON-BOARD DIAGNOSTIC
FUNCTIONS INOPERATIVE

)

3

Transmitter ID code cannot be
reprogrammed.

• Malfunction in transmitter battery, transmitter,

door lock timer unit bracket, door lock timer
unit bracket ground screw or door lock timer
unit circuit.

(See

S–133 NO. 3

TRANSMITTER ID CODE
CANNOT BE REPROGRAMMED

)

1

One or more on-board diagnostic functions inoperative

DESCRIPTION

• Malfunction in hazard warning light system, or door lock linkage system, driver’s door key cylinder

switch system.

POSSIBLE

CAUSE

• Malfunction in hazard warning light system

— Hazard warning light circuit
— Door lock timer unit malfunction
— Malfunction in wiring harness between door lock timer unit and flasher unit

• Malfunction in door lock linkage

• Malfunction in door lock timer unit door lock/unlock signal circuit

— Door lock timer unit malfunction

STEP

INSPECTION

ACTION

1

INSPECT HAZARD WARNING LIGHT
OPERATION DURING ON-BOARD
DIAGNOSIS

• Did hazard warning lights flash during on-

board diagnostic function operation?

Yes

Go to Step 4.

No

Go to next step.

2

INSPECT HAZARD WARNING LIGHT
CIRCUIT

• Do hazard warning lights flash when hazard

warning switch is on?

Yes

Go to next step.

No

Inspect hazard warning light circuit.

*3

CHECK TO SEE WHETHER MALFUNCTION
IS IN WIRING HARNESS (BETWEEN DOOR
LOCK TIMER UNIT AND FLASHER UNIT) OR
DOOR LOCK TIMER UNIT

• Measure voltage at door lock timer unit

connector terminal I (24 pin) during on-board
diagnostic function operation.
— When hazard warning light flashed:

B+

⇔below 1.0 V

• Is voltage as above?

Yes

Recheck malfunction symptoms, then repeat from Step 1 if
malfunction reoccurs.

No

• Inspect wiring harness between door lock timer unit and

flasher unit.
— If wiring harness is OK, replace door lock timer unit

and reprogram transmitter ID code, then go to Step 7.

— If wiring harness malfunction, repair wiring harness,

then go to Step 7.

4

MAKE SURE THAT ALL DOORS LOCK AND
UNLOCK DURING ON-BOARD DIAGNOSIS

• Did all doors unlock and lock during on-

board diagnostic function operation?

Yes

Recheck malfunction symptoms, then repeat from Step 1 if
malfunction reoccurs.

No

Go to next step.

5

INSPECT DOOR LOCK LINKAGE

• Operate door lock knob and make sure door

locks and unlocks manually.

• Does every door lock system work?

Yes

Go to next step.

No

Inspect door lock linkage.

S–132

TROUBLESHOOTING [KEYLESS ENTRY SYSTEM]

End Of Sie

NO. 2 ALL ON-BOARD DIAGNOSTIC FUNCTIONS INOPERATIVE

A6E778269000W07

• When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while

doing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions. If
there is a problem, check to make sure connectors, terminals and wiring harnesses are connected correctly
and undamaged.

Diagnostic procedure

*6

CHECK TO SEE WHETHER MALFUNCTION
IS IN DOOR LOCK ACTUATOR, DOOR LOCK
TIMER UNIT GROUND CIRCUIT OR
ELSEWHERE

• Measure voltage at door lock timer unit

connector terminal C, D (6 pin) during on-
board diagnostic function operation.
— All door locked: below 1.0 V

→B+→below

1.0 V (terminal D, 6 pin)

— All door unlocked: B+

→below 1.0 V→B+

(terminal C, 6 pin)

• Is voltage as above?

Yes

Recheck malfunction symptoms, then repeat from Step 1 if
malfunction reoccurs.

No

• Inspect door lock timer unit connector.

• Inspect wiring harness between door lock timer unit and

door lock actuator.
— If above parts are OK, go to next step.
— If above parts malfunction, repair malfunction part.

7

RECHECK MALFUNCTION SYMPTOM AFTER
REPAIR

• Does keyless entry system operate

properly?

Yes

Troubleshooting completed.
Explain repairs to customer.

No

Recheck malfunction symptoms, then repeat from Step 1 if
malfunction reoccurs.

STEP

INSPECTION

ACTION

2

All on-board diagnostic functions inoperative

DESCRIPTION

• Malfunction in door lock timer unit power supply circuit, door switch circuit, cargo compartment light

circuit or door lock timer unit ground circuit.

POSSIBLE

CAUSE

• Malfunction in IG1, B+ signal circuit of door lock timer unit

— Door lock timer unit power supply fuse malfunction
— Malfunction in wiring harness between door lock timer unit power supply fuse(s) and door lock timer

unit itself

• Malfunction in door lock timer unit's door open/closed signal circuit

— Door switch system malfunction
— Door lock timer unit malfunction
— Malfunction in wiring harness between door lock timer unit and door switch

• Malfunction in door lock timer unit's liftgate or trunk lid open/closed signal circuit

— Cargo compartment light switch system malfunction
— Door lock timer unit malfunction
— Malfunction in wiring harness between door lock timer unit and cargo compartment light switch

• Malfunction in door lock timer unit GND signal circuit

— Malfunction in wiring harness between door lock timer unit and ground

STEP

INSPECTION

ACTION

1

INSPECT DOOR LOCK TIMER UNIT POWER
SUPPLY FUSES

• Are door lock timer unit power supply fuses

okay?

Yes

Go to next step.

No

Check for a short to ground on blown fuse's circuit. Repair
or replace as necessary.
Install appropriate amperage fuse.

2

INSPECT DOOR SWITCH INSTALLATION

• Are door switches installed securely?

Yes

Go to next step.

No

Install door switch(es) securely, then go back to Step 5 of
keyless entry system preliminary inspection.

*3

CHECK TO SEE WHETHER MALFUNCTION
IS IN WIRING HARNESS (LACK OF
CONTINUITY BETWEEN FUSE BLOCK AND
DOOR LOCK TIMER UNIT) OR ELSEWHERE

• Turn ignition switch to ON position.

• Measure voltage at following door lock timer

unit terminals:
— IG1 signal (Terminal B (24 pin))
— B+ signal (Terminal A (24 pin))

• Is voltage B+?

Yes

Go to next step.

No

Repair wiring harness between fuse block and door lock
timer unit, then go to Step 8.

TROUBLESHOOTING [KEYLESS ENTRY SYSTEM]

S–133

S

End Of Sie

NO. 3 TRANSMITTER ID CODE CANNOT BE REPROGRAMMED

A6E778269000W08

Diagnostic procedure

*4

CHECK TO SEE WHETHER MALFUNCTION
IS IN WIRING HARNESS (SHORT TO B+
BETWEEN FUSE BLOCK AND DOOR LOCK
TIMER UNIT, OR BETWEEN DOOR LOCK
TIMER UNIT AND GROUND) OR
ELSEWHERE

• Turn ignition switch to LOCK position.

• Disconnect door lock timer unit connector.

• Measure voltage at following door lock timer

unit connector terminals:
— IG1 signal (Terminal B (24 pin))

• Is voltage B+?

Yes

Repair malfunctioning wiring harness, then go to Step 8.

No

Go to next step.

*5

CHECK TO SEE WHETHER MALFUNCTION
IS IN WIRING HARNESS (LACK OF
CONTINUITY BETWEEN DOOR LOCK TIMER
UNIT AND GROUND) OR ELSEWHERE

• Is there continuity between door lock timer

unit connector terminal W (24 pin) and
ground?

Yes

Go to next step.

No

Repair wiring harness between door lock timer unit and
ground, then go to Step 8.

6

INSPECT FOR CHECK CODE 04 IN
INSTRUMENT CLUSTER

• Inspect door switch using instrument cluster

input/output check mode.
(See Section T)

• Does DTC 04 function properly?

Yes

Go to next step.

No

Repair door switch system using DTC 04 inspection
procedure, then go to Step 8.

7

INSPECT DOOR LOCK TIMER UNIT OR
WIRING HARNESS (BETWEEN DOOR LOCK
TIMER UNIT AND DOOR SWITCHES, CARGO
COMPARTMENT LIGHT SWITCH FOR
CONTINUITY)

• Open the driver-side door.

• Is there continuity between door lock timer

unit connector terminal K, G (24 pin) and
ground?

Yes

Replace door lock timer unit and reprogram door lock timer
unit ID code, then go to next step.

No

Repair wiring harness between door lock timer unit and door
switch(es), cargo compartment light switch then go to next
step.

8

RECHECK MALFUNCTION SYMPTOM AFTER
REPAIR

• Does keyless entry system operate

properly?

Yes

Troubleshooting completed.
Explain repairs to customer.

No

Recheck malfunction symptoms, then repeat from Step 1 if
malfunction reoccurs.

STEP

INSPECTION

ACTION

3

Transmitter ID code cannot be reprogrammed

DESCRIPTION

• Malfunction in transmitter battery, transmitter door lock timer unit bracket, door lock timer unit bracket

ground screw or door lock timer unit circuit.

POSSIBLE

CAUSE

• Malfunction in transmitter battery, transmitter, door lock timer unit bracket, door lock timer unit bracket

ground screw or door lock timer unit circuit
— Transmitter battery, transmitter, door lock timer unit bracket, door lock timer unit bracket ground

screw or door lock timer unit malfunction

STEP

INSPECTION

ACTION

1

INSPECT TRANSMITTER BATTERY
INSTALLATION AND TYPE

• Visually inspect transmitter battery.

• Are below items okay?

— Transmitter battery installation (correct

polarity)

— Battery type (CR2025)

Yes

Go to next step.

No

Set transmitter battery properly or replace with specified
transmitter battery (CR2025), then go to Step 8.

2

INSPECT TRANSMITTER BATTERY
TERMINALS FOR RUST AND POOR
CONNECTION

• Visually inspect transmitter.

— Is there rust on transmitter battery

terminals (positive or negative pole)?

— Is there poor connection between

terminals and battery?

Yes

Replace transmitter battery or repair transmitter battery
terminal, then go to Step 8.

No

Go to next step.