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
11
Wheel speed sensor, right front
12
Wheel speed sensor, left front
13
Wheel speed sensor, right rear
14
Wheel speed sensor, left rear
15
Wheel speed sensors
22
Hydraulic modulator - harness (626/MX-6
6/94)
22
Hydraulic modulator - harness (Xedos 6
4/94)
22
Hydraulic modulator solenoid valve, RH front
24
Hydraulic modulator solenoid valve, LH front
26
Hydraulic modulator solenoid valve, RH rear
28
Hydraulic modulator solenoid valve, LH rear
29
Hydraulic modulator
29
Brake line - RH front, LH rear
30
Hydraulic modulator
30
Brake line - LH front, RH rear
51
System relay
53
Pump motor
53
Pump motor relay
61
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
© Autodata Limited 2004
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
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
.
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
© Autodata Limited 2004
26.03.2007
V5.500-
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