Mazda Xedos 6. Handbuch - teil 178

General information

Electronic control unit (ECU) incorporates self-diagnosis function.
ABS warning lamp will illuminate in the event of system failure.
Trouble codes can be accessed with suitable code reader connected to the data link connector (DLC) or diagnostic socket

Fig. 1

For DLC or diagnostic socket location refer to System layout and components.

Accessing trouble codes

Ensure ignition switched OFF.
Bridge data link connector (DLC) terminals TBS and GND

Fig. 2

Connect LED test lamp between terminals FBS and GND

Fig. 3

Switch ignition ON.
Check that LED flashes.
Long flashes indicate the 'tens' of the trouble code

Fig. 4

[A].

Short flashes indicate the 'units' of the trouble code

Fig. 4

[C].

A short pause separates each flash

Fig. 4

[B].

A long pause separates each trouble code

Fig. 4

[D].

For example: Trouble code 12 displayed

Fig. 4

Count warning lamp flashes. Compare with trouble code table.
Switch ignition OFF.
Remove bridge wire.

Erasing trouble codes

Bridge data link connector (DLC) terminals TBS and GND

Fig. 2

Switch ignition ON.
Any stored trouble codes should be indicated.
Depress and release brake pedal 10 times within 10 seconds.
Remove bridge wire.

Trouble code identification

Trouble code

Fault location

Wheel speed sensor, right front

Wheel speed sensor, left front

Wheel speed sensor, right rear

Wheel speed sensor, left rear

Wheel speed sensors

Hydraulic modulator - harness (626/MX-6

6/94)

Hydraulic modulator - harness (Xedos 6

4/94)

Hydraulic modulator solenoid valve, RH front

Hydraulic modulator solenoid valve, LH front

Hydraulic modulator solenoid valve, RH rear

Hydraulic modulator solenoid valve, LH rear

Hydraulic modulator

Brake line - RH front, LH rear

Hydraulic modulator

Brake line - LH front, RH rear

System relay

Pump motor

Pump motor relay

Electronic control unit (ECU)

Manufacturer: Mazda

Model: Xedos 6 (CA) 2,0

Engine code: KF

Output: 103 (140) 6000

Tuned for: R-Cat

Year: 1995-00

© Autodata Limited 2004

26.03.2007

V5.500-

Supply voltage - battery, alternator

ABS warning lamp

Correct operating sequence -

1994

Switch ignition ON.
Lamp illuminates.
Start engine.
Lamp extinguishes.

Correct operating sequence - 1994

Switch ignition ON.
Lamp illuminates.
Lamp extinguishes after 3 seconds.

General test procedures

NOTE: Due to small size of ECU harness multi-plug pins it is advisable to use a breakout box.

Warning lamp circuit

Checking -

Fig. 5

Switch ignition ON.
Check warning lamp illuminates.
If not: Switch ignition OFF.
Check fuses.
Disconnect relay module multi-plug.
Disconnect ECU multi-plugs.
Connect breakout box to 18-pin ECU harness multi-plug.
Bridge breakout box terminal 2L and earth.
Switch ignition ON.
Check warning lamp illuminates.
If not: Switch ignition OFF.
Check bulb and wiring.

Wheel speed sensors

Preparatory conditions

Check wheel bearings for excessive play. Adjust or replace as necessary.
Check wheel speed sensors for mechanical security.
Inspect wheel speed sensor rings visually for damage and cleanliness.

Checking air gap

Technical Data

Air gap

0,3-1,1 mm

Tightening torque 16-23 Nm

No adjustment of wheel speed sensor air gaps is possible.
If removed or replaced: Tighten fixing to specified torque.

Checking resistance - front -

Fig. 6

Fig. 7

Manufacturer: Mazda

Model: Xedos 6 (CA) 2,0

Engine code: KF

Output: 103 (140) 6000

Tuned for: R-Cat

Year: 1995-00

© Autodata Limited 2004

26.03.2007

V5.500-

Technical Data

Terminals Wheel speed sensor Resistance

2O & 2P

Left hand

1600-2000

Ω

2N & 2M

Right hand

1600-2000

Ω

Ensure ignition switched OFF.
Disconnect ECU multi-plugs.
Connect breakout box to 18-pin harness multi-plug.
Check resistance between breakout box terminals

Fig. 6

If resistance not as specified:
Disconnect relevant wheel speed sensor multi-plug.
Check resistance between wheel speed sensor terminals

Fig. 7

If resistance as specified: Check wiring.
If resistance not as specified: Suspect faulty wheel speed sensor.
Repeat test for other wheel speed sensor.

Checking resistance - rear -

Fig. 6

Fig. 7

Technical Data

Terminals Wheel speed sensor Resistance

2R & 2Q

Left hand

1600-2000

Ω

2S & 2T

Right hand

1600-2000

Ω

Ensure ignition switched OFF.
Disconnect ECU multi-plugs.
Connect breakout box to 18-pin harness multi-plug.
Check resistance between breakout box terminals

Fig. 6

If resistance not as specified:
Disconnect relevant wheel speed sensor multi-plug.
Check resistance between wheel speed sensor terminals

Fig. 7

If resistance as specified: Check wiring.
If resistance not as specified: Suspect faulty wheel speed sensor.
Repeat test for other wheel speed sensor.

Checking voltage - front -

Fig. 8

Fig. 9

Technical Data

Terminals Wheel speed sensor

Voltage

626/MX-6

2O & 2P

Left hand

0,25-3,0 V ac

2N & 2M

Right hand

0,25-3,0 V ac

Xedos 6

2O & 2P

Left hand

0,25-1,2 V ac

2N & 2M

Right hand

0,25-1,2 V ac

Ensure ignition switched OFF.
Raise vehicle.
Disconnect ECU multi-plugs.
Connect breakout box to 18-pin harness multi-plug.
Adjust voltmeter to measure alternating current.
Turn road wheel at 60 rpm.
Check voltage between breakout box terminals

Fig. 8

Manufacturer: Mazda

Model: Xedos 6 (CA) 2,0

Engine code: KF

Output: 103 (140) 6000

Tuned for: R-Cat

Year: 1995-00

26.03.2007

V5.500-

If voltage not as specified:
Disconnect relevant wheel speed sensor multi-plug.
Turn road wheel at 60 rpm.
Check voltage between wheel speed sensor terminals

Fig. 9

If voltage as specified: Check wiring.
If voltage not as specified: Suspect faulty wheel speed sensor.
Repeat test for other wheel speed sensor.

Checking voltage - rear -

Fig. 8

Fig. 9

Technical Data

Terminals Wheel speed sensor

Voltage

626/MX-6

2R & 2Q

Left hand

0,25-3,0 V ac

2S & 2T

Right hand

0,25-3,0 V ac

Xedos 6

2R & 2Q

Left hand

0,25-1,2 V ac

2S & 2T

Right hand

0,25-1,2 V ac

Fig. 8

If voltage not as specified:
Disconnect relevant wheel speed sensor multi-plug.
Turn road wheel at 60 rpm.
Check voltage between wheel speed sensor terminals

Fig. 9

If voltage as specified: Check wiring.
If voltage not as specified: Suspect faulty wheel speed sensor.
Repeat test for other wheel speed sensor.

Checking wave form - front -

Fig. 10

Technical Data

Terminals Wheel speed sensor

2O & 2P

Left hand

2N & 2M

Right hand

Ensure ignition switched OFF.
Raise vehicle.
Disconnect ECU multi-plugs.
Connect breakout box to 18-pin harness multi-plug.
Connect oscilloscope between breakout box terminals.
Turn road wheel at approximately 60 rpm.
Check wave form of wheel speed sensor.
If wave form not as specified:
Disconnect relevant wheel speed sensor multi-plug.
Turn road wheel at approximately 60 rpm.
Check wave form between wheel speed sensor terminals.
If wave form as specified: Check wiring.
If wave form not as specified: Suspect faulty wheel speed sensor.
Repeat test for other wheel speed sensor.

Manufacturer: Mazda

Model: Xedos 6 (CA) 2,0

Engine code: KF

Output: 103 (140) 6000

Tuned for: R-Cat

Year: 1995-00

26.03.2007

V5.500-

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