cavalier abs?

[k.mullen]

couldn't find cavalier there,
anyway i've a 94 1.7td cav, fairly standard and unabused, reciently the abs light started comming on from time to time but now its just on full time, my question is if anybody knows what the prob might be or is it my abs unit giving up the ghost!

[rrv8]

Dis-engage the diagnostics plug from its socket.
This is positioned at the rear of the engine bay on the passengers side on cavalier/calibra’s, on the astra3 it’s in the fusebox, and on vectra’s around the handbrake.
It has 10 pins.
Short pins A & K to read the ABS codes. (for example)
The ABS warning light will start to flash as follows.

The code 12 is first flashed three times, this is a marker
If a code is stored it is then flashed three times.
The code 12 is then flashed three times, this is a separator
If a 2nd code is stored it is then flashed three times or the first code is repeated.
The code 12 is then flashed three times, this is a separator
etc

To clear codes you should disconnect the battery for a minimum of
10 minutes and then re-connect.


ABS. Short pins A and K on the diag plug

Early models which have the old ABS system where the control unit is located at the side of the passenger seat in a lump in the carpet do not usually have this fault code facility. Check whether the diag plug has a wire at location K.
Calibra 2WD H reg models should be able to read codes out.

16 LH Front Solenoid ( Relay & Connections )
17 RH Front Solenoid ( Relay & Connections )
18 Rear Solenoids ( Relay & Connections )
19 Solenoids Relay Circuits
25 Faulty Sensor toothed Ring
35 Pump Relay Circuits
37 Stop Lamp Switch ( Pedal Switch )
39 LH Front Speed Sensor ( Air Gap & Operation )
41 LH Front Speed Sensor ( Resistance & Connections )
42 RH Front Speed Sensor ( Air Gap & Operation )
43 RH Front Speed Sensor ( Resistance & Connections )
44 LH Rear Speed Sensor ( Air Gap & Operation )
45 LH Rear Speed Sensor ( Resistance & Connections )
46 RH Rear Speed Sensor ( Air Gap & Operation )
47 RH Rear Speed Sensor ( Resistance & Connections )
48 System Voltage High/Low ( Alternator & Battery )
55 Faulty ECU

 Diag Connector Pinout

A Brown Ground
B Brown/Yellow Engine ECU
C Brown/Black Automatic Gearbox (not models with traction control ie V6)
D Brown/Red Fuel Computer (LCD dash ‑ not UK models)
E Brown/Blue Engine ECU light / Uni dirrection data line to engine ecu
F Red +12v (fused via F8)
G Brown/White Bi dirrectional data line
H Brown/Blue Alarm (ride control) %
J Brown/Grey 4x4 or Traction Control (* not 4x4 on M reg models on)
(# not TC on later models)
K Grey ABS


* Later models, approx 1994 Model year L reg which do not have mechanical speedo cables will have a wire in location J
approx 1995 Model year M reg do not have a wire in location J
However on both of the above, the code flash technique does not work. (Only Tech 1)

# Later models which do not have a wire in location J, the Traction control code can not be read out with this flash techique.


% Later M reg + Calibra models, the Alarm codes can not be read out with this flash techique.

[k.mullen]

will try some of this next chance i get, cheers

[Dod]

I did a few Flash Codes earlier mate, they're dead on easy to do.

[jason19]

take the bulb out, job done :biggrin:

[k.mullen]

take the bulb out, job done :biggrin:


be simple solution alright but when theres abs in car i'd prefer have it working, that and the fact its for nct in two wks!