This is the diagnostic box on my '97 Freda 2.5 TurboDiesel.It's sad to see that there are limitations to the information you can get from it, but below is the page prepared by John Wood giving clear instructions for the Mazda 626 -note that the box is shown upside down to the way it's fitted in the Bongo: Bongo owners have to think outside the box.

Obviously neither John nor myself can be responsible for anyone who destroys either themselves, their car or anything else for following these instructions.

The Diagnostic Connector

Pin Name (see above)

Pin Name

Function

A

FEN

Trouble code output (engine control computer)

B

MEN

Switch monitor output (engine control computer)

C

TEN

Diagnostic-mode input (engine control computer)

D

+B

Switched battery voltage

E

GND

Ground

F

FAT

Trouble code output (automatic transmission control computer)

G

FBS

Trouble code output (anti-lock brakes (ABS) control computer)

H

FAC

Trouble code output (air conditioning (A/C))

J

FWS

Trouble code output (Four wheel steering (4WS))

K

FSC

Trouble code output (cruise (speed) control computer)

L

-

Not used

M

TAT

Diagnostic-mode input (automatic transmission control computer)

N

TBS

Diagnostic-mode input (anti-lock brakes (ABS) control computer)

P

TAC

Diagnostic-mode input (air conditioning (A/C))

Q

TWS

Diagnostic-mode input (Four wheel steering (4WS))

R

TSC

Diagnostic-mode input (cruise (speed) control computer)

S

-

Not used

T

FAB

Trouble code output (air-bag diagnostic monitor computer)

U

IG-

Igniter coil output (for connection to external tachometer)

V

GND

Ground

W

TFA

Diagnostic-mode input (Special use only)

X

F/P

Fuel pump relay coil (ground to activate fuel pump)

Y

TAB

Horn relay

Z

-

Not used

3

-

Not used

 

Malfunction codes can be retrieved from the engine, ABS, automatic transmission, Cruise Control, 4WS and air-bag computers by reading the codes flashed by the LED.


Engine Malfunction Codes

Engine codes can be read by connecting the TEN and GND pins, using the jumper wire. (See above for the location of this pin) and The LED connected to B+ and FEN pins. The codes are read by counting the number of flashes given out from the LED. The RED lead goes to the B+ pin

BE CAREFUL CONNECTING THE B+ PIN... this is a live 30A feed

The first series of long flashes (1.2 Secs) are the tens position. There is a short pause (1.6 Secs) and then the second series of quick flashes (0.4 Secs) begins which are the digits. The codes are repeated indefinitely.

Example:  ------ ------ (2)   -- -- -- (3)   is 23 RH 02 Sensor

A summary of the codes and the reasons:

 

Code

Affected System or Component

 

FE

KL

02

NE1 (crankshaft position sensor)

NE2 (crankshaft position sensor 2)

03

G (crankshaft position sensor)

G (crankshaft position sensor 1)

04

 

NE1 (crankshaft position sensor 1)

05

 

Knock sensor

06

Vehicle speed sensor

 

08

Airflow Sensor

Airflow Sensor

09

Water Thermosensor (EGI)

Water Thermosensor (EGI)

10

 

Intake Air Thermosensor

12

Throttle position sensor

Throttle position sensor

14

BARO sensor (located within ECU)

BARO sensor (located within ECU)

15

Oxygen Sensor

Oxygen Sensor LH

16

 

EGR Position Sensor

17

Feedback System (02 Sensor)

Feedback System (LH 02 Sensor)

23

 

Oxygen Sensor RH

24

 

Feedback System (RH 02 Sensor)

25

Solenoid Valve (Pressure Regulator Control)

Solenoid Valve (Pressure Regulator Control)

26

Solenoid Valve (Purge Control)

Solenoid Valve (Purge Control)

28

Solenoid Valve (EGR Control)

Solenoid Valve (EGR Vacuum)

29

 

Solenoid Valve (EGR Vent)

34

Solenoid Valve (ISC)

Solenoid Valve (ISC)

41

 

Solenoid Valve (VRIS1)

46

 

Solenoid Valve (VRIS2)

67

Electric Cooling Fan Relay (Low temp)

Electric Cooling Fan Relay No1

68

Electric Cooling Fan Relay (High temp (ATX))

 

69

Water Thermosensor Fan

Water Thermosensor Fan

 

Automatic Transmission (ATX) Malfunction Codes

Automatic transmission codes can be read by connecting the TAT and GND pins (see above for the location of this pin) and The LED connected to B+ and FAT pins. The codes are read exactly as they are when reading the engine codes. A summary of the codes and the reasons:

 

Code

Affected System or Component

01

NE1 (crankshaft position sensor)

06

Vehicle speed sensor

12

Throttle position sensor

14

BARO sensor (located within PCME)

55

Vehicle speed pulse generator

56

ATF thermosensor

57

Reduce torque signal 1

58

Reduce torque signal 2

59

Torque reduced/ECT sensor

60

1-2 shift solenoid valve

61

2-3 shift solenoid valve

62

3-4 shift solenoid valve

63

Converter lock-up solenoid valve

64

3-2 timing solenoid valve

65

Converter lock-up valve

66

Line pressure solenoid valve

 

Anti-Lock Braking System (ABS) Malfunction Codes

Anti-lock braking (ABS) system codes are read when the TBS and GND pins are connected in the Diagnostic connector (see above) and The LED connected to B+ and FBS pins. The codes are read, again, like the engine codes. A summary of codes and the reasons:

 

Code

Affected System or Component

11

Right front wheel speed sensor or rotor

12

Left front wheel speed sensor or rotor

13

Right rear wheel speed sensor or rotor

14

Left rear wheel speed sensor or rotor

15

Wheel speed sensor

22

Hydraulic unit harness

51

Fail-safe relay

53

Motor or motor relay

61

ABS control unit

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