Mazda326-ford laser- Mazda protege

Para entrar en el coche en el modo de diagnóstico para MCU o MECS-II debe puentear alfileres C (RTE) y E (GND). Sin embargo, si eso no funciona (como podría ser el caso en las versiones europeas) y luego intentar puentear pin C (RTE) al terminal negativo de la batería.

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 voltageE = GND = groundF = FAT = trouble code output (automatic transmission control computer)G = FBS = trouble code output (anti-lock brakes (ABS) control computer)H = FAC = trouble code output (? not documented for North American vehicles)J = FWS = trouble code output (? not documented for North American vehicles)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 (? not documented for North American vehicles)Q = TWS = diagnostic-mode input (? not documented for North American vehicles)R = TSC = diagnostic-mode input (cruise (speed) control computer)S = - = not usedT = FAB = trouble code output (air-bag diagnostic monitor computer)U = IG- = igniter coil output (for connection to external tachometer)V = GND = groundW = TFA = diagnostic-mode input (? not documented for North American vehicles)X = F/P = fuel pump relay coil (ground to activate fuel pump)Y = TAB = horn relayZ = - = not used3 = - = not used

MECS-II (CEL) Check Engine Light codesThese are the main check engine light codes for MECS-II 626's. You put the car into

diagnostic mode by using a jumper wire between the C (TEN) & E (GROUND) pins of the

diagnostic box under the hood of your car.

Code = Memory = Circuit Diagnosed

02 = Yes = 'NE2' crankshaft position sensor

03 = Yes = 'G' camshaft position sensor

04 = Yes = 'NE1' camshaft/crankshaft position sensor

05 = Yes = Knock sensor

08 = Yes = Volume Air Flow sensor (VAF)

09 = Yes = Coolant temperature sensor (CTS)

10 = Yes = Intake air temperature sensor (IAT)

12 = Yes = Throttle position sensor (TPS)

14 = Yes = Barometric pressure sensor

15 = Yes = LHO2S inactivation error

16 = Yes = Exhaust gas recirculation (EGR) system

17 = Yes = LHO2S inversion error

23 = Yes = RHO2S inactivation error

24 = Yes = RHO2S inversion error

25 = Yes = Fuel pressure regulator control solenoid

26 = No = Canister purge solenoid

28 = No = EGR vacuum solenoid

29 = No = EGR vent solenoid

34 = No = Idle air control (IAC) solenoid

41 = No = VRIS #1 solenoid

46 = No = VRIS #2 solenoid

67 = No = LFAN relay (1993 only)

69 = Yes = ECTF sensor (1993 only)

(HOLD) Automatic Transmission (ATX) Malfunction codesAutomatic transmission codes can be read by connecting the TAT and GND pins (see above

for the location of this pin) and watching the "hold" light on the instrument cluster. The codes

are read exactly as they are when reading the engine codes, except that the Hold light

flashes, not the Check Engine Light. A summary of the codes and the reasons:

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

(ABS) Anti-Lock Braking System Malfunction codesAnti-lock braking (ABS) system codes are read when the TBS and GND pins are connected in

the Diagnostic connector (see above). The codes are read, again, like the engine codes, but

now on the ABS light on the instrument cluster. A summary of codes and the reasons:

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

(SRS) Supplemental Restraint System Malfunction codesThe supplemental restraint (SRS), more commonly known as the "air bag" system will flash

the highest priority code on the air-bag lamp on the dash with no need for any pin in the

Diagnostic box to be grounded. The codes are read, again, like the engine codes, but now on

the Air Bag light on the instrument cluster. A summary of codes and the reasons (NOTE:

these are from a 1993 Ford Service Manual. Later models with dual airbags (1994+) may

have additional codes not covered here. Email me if you encounter one. Also, I hope but am

unsure if these apply to the MX-6...):

In order of priority from highest to lowest:

- = No air bag lamp: diagnostic monitor (DM), ignition power or bulb circuit

- = Continuous lamp: DM disconnected or inoperative

12 = Low battery voltage

13 = Air bag circuit or crash sensor shorted to ground

21 = Safing sensor mounted incorrectly

22 = Safing sensor: output shorted to battery voltage

23 = Safing sensor input feed or return circuit open

24 = Open in circuit 944B or low-resistance in crash sensor(s)

32 = Driver's side air-bag / safing sensor: high resistance or open

33 = Pin 7 not grounded at DM

34 = Driver's side air-bag / safing sensor: low resistance or shorted

35 = Low resistance across pins 8 and 9 of DM

41 = Crash sensor circuit: high resistance or open

44 = RH crash sensor not mounted properly

45 = Center (radiator) crash sensor not mounted properly

46 = LH crash sensor not mounted properly

51 = DM internal fuse: blown and short to ground no longer exists

52 = Backup-power supply: voltage boost fault

53 = Internal DM fault

- = Rapid continuous flashing or air-bag lamp: all crash sensors disconnected