Brake valo ?

[jupasierra]

Missähän vika kun brake valo palaa koko ajan. Tehty juuri jarruremontti. Otteessa lukee ABS, eli ilmeisesti absit takajarruissa ? Mistähän sieltä mahtaa löytyä pyörimisen tuntoanturit ? Akun napa oli yön irti mutta ei kuittaantunut ? Auto on -90 Chevrolet Fleetside. Vastaukset: juha.paivinen@pp.inet.fi

[Tuukka]

Oletko tarkistanu sen seisontajarrun polkimen anturin?

[jupasierra]

Oletko tarkistanu sen seisontajarrun polkimen anturin?

En ole, täytyy tarkistaa !

[BUMBA]

jarrunesteet?jarruliinat tarpeeksi lähellä?tommosia tuli mieleen......

[jupasierra]

jarrunesteet?jarruliinat tarpeeksi lähellä?tommosia tuli mieleen......

Nesteet tarkistettu ja jarruremontti juuri tehty.

[rasse]

Löytyypi nuo koodit vanhempaan ja uudempaan ohjeiden kera...
Nyt en voi laittaa mutta paiskaan huomenissa kun pääsen omalle koneelle jollei joku ehdi ennemmin...

[rasse]

Tässäpä jotain juttua asiasta... esim G20 Van -91 jne...(lontoon kielellä) lopussa linkit kuviin....

YLEISTÄ:

There are two basic types of anti-lock systems available for this vehicle; a Rear Wheel Anti-Lock
(RWAL) brake system and 4 Wheel Anti-Lock (4WAL) brake system.
The RWAL system components consist of the Vehicle Speed Sensor (VSS), the Electronic Control
Unit (ECU), the isolation/dump valve and the Vehicle Speed Sensor Buffer (also known as the
Digital Ratio Adapter). The ECU also receives signals from various brake switches.
The 4WAL system components consist of the Electro-Hydraulic Control Unit (ECHU) valve (also
known as the Brake Pressure Modulator Valve or BPMV), the wheel speed sensors, Vehicle Speed
Sensor (VSS) on 3 sensor systems and the VSS Buffer.



VIKAKOODIT:

READING TROUBLE CODES
Rear Wheel Anti-lock Brakes
The trouble codes are read by jumping terminal A and terminal H of the ALDL (assembly line
diagnostic link) with a jumper wire. Observe the flashing of the brake warning light. The terminals
must be jumped for about 20 seconds before the code will begin to flash.
Count the number of short flashes starting from the long flash. Include the long flash as a count.
Sometimes the first count sequence will be short, however, following counts will be accurate.
If there is more than one failure, only the first recognized code will be retained and flashed.

Code 1--ECU malfunction
Code 2--Open isolation valve or faulty ECU
Code 3--Open dump valve or faulty ECU
Code 4--Grounded anti-lock valve switch
Code 5--Excessive dump valve activity during stop
Code 6--Erratic speed system
Code 7--Shorted isolation valve or faulty ECU
Code 8--Shorted dump valve or faulty ECU
Code 9--Open speed signal circuit
Code 10--Brake lamp switch circuit
Code 11--Faulty ECU
Code 12--Faulty ECU
Code 13--Faulty ECU
Code 14--Faulty ECU
Code 15--Faulty ECU


4-Wheel Anti-lock Brakes

EXCEPT 1996-97 MODELS

The trouble codes are read by jumping terminal A and terminal H of the ALDL (assembly line
diagnostic link) with a jumper wire. Observe the flashing of the ANTI-LOCK warning light. The
terminals must be jumped for about 20 seconds before the code will begin to flash.
Count the number of short flashes starting from the long flash. Include the long flash as a count.
Sometimes the first count sequence will be short, however, following counts will be accurate.
If there is more than one failure, only the first recognized code will be retained and flashed.

Code 21--RF speed sensor or circuit open
Code 22--Missing RF speed signal
Code 23--Erratic RF speed sensor
Code 25--LF speed sensor or circuit open
Code 26--Missing LF speed signal
Code 27--Erratic LF speed sensor
Code 29--Simultaneous drop out of front speed sensors
Code 31--RR speed sensor or circuit open
Code 32--Missing RR speed signal
Code 33--Erratic RR speed signal
Code 35--VSS or LR speed sensor or circuit open
Code 36--Missing VSS or LR speed sensor or circuit open
Code 37--Erratic VSS or LR speed sensor signal
Code 38--Wheel speed error
Code 41-54--Control valves
Code 61-63--Reset switches
Code 65-66--Open or shorted pump motor relay
Code 67--Open motor circuit or shorted BPMV output
Code 68--Locked motor or shorted motor circuit
Code 71-74--Memory errors
Code 81--Brake switch circuit shorted or open
Code 86--Shorted anti-lock indicator lamp
Code 88--Shorted brake warning lamp

1996-97 MODELS

Trouble codes on the 1996-97 vehicles can only be read using a scan tool. It is not possible to read
the trouble codes by the flashing light method.

Code C0021--RF speed sensor or circuit open
Code C0022--Missing RF speed signal
Code C0023--Erratic RF speed sensor
Code C0025--LF speed sensor or circuit open
Code C0026--Missing LF speed signal
Code C0027--Erratic LF speed sensor
Code C0029--Simultaneous drop out of front speed sensors
Code C0035--VSS or LR speed sensor or circuit open
Code C0036--Missing VSS or LR speed sensor or circuit open
Code C0037--Erratic VSS or LR speed sensor signal
Code C0038--Wheel speed error
Code C0041- C0054--Control valves
Code C0065- C0066--Open or shorted pump motor relay
Code C0067--Open motor circuit or shorted BPMV output
Code C0068--Locked motor or shorted motor circuit
Code C0071- C0074--Memory errors
Code C0081--Brake switch circuit shorted or open
Code C0086--Shorted anti-lock indicator lamp


ABS:N ILMAUS


The brake system must be bled when any brake line is disconnected or there is air in the system.
NOTE: Never bleed a wheel cylinder when a drum is removed.

1. Clean the master cylinder of excess dirt and remove the cylinder cover and the diaphragm.
2. Fill the master cylinder to the proper level. Check the fluid level periodically during the
bleeding process, and replenish it as necessary. Do not allow the master cylinder to run dry,
or you will have to start over.
3. Before opening any of the bleeder screws, you may want to give each one a shot of
penetrating solvent. This reduces the possibility of breakage when they are unscrewed.
4. Attach a length of vinyl hose to the bleeder screw of the brake to be bled. Insert the other end
of the hose into a clear jar half full of clean brake fluid, so that the end of the hose is beneath
the level of fluid. The correct sequence for bleeding is to work from the brake farthest from the
master cylinder to the one closest; right rear, left rear, right front, left front.
5. The combination valve must be held open during the bleeding process. A clip, tape, or other
similar tool (or an assistant) will hold the metering pin in.
6. Depress and release the brake pedal three or four times to exhaust any residual vacuum.
7. Have an assistant push down on the brake pedal and hold it down. Open the bleeder valve
slightly. As the pedal reaches the end of its travel, close the bleeder screw and release the
brake pedal. Repeat this process until no air bubbles are visible in the expelled fluid.
NOTE: Make sure your assistant presses the brake pedal to the floor slowly. Pressing
too fast will cause air bubbles to form in the fluid.
8. Repeat this procedure at each of the brakes. Remember to check the master cylinder level
occasionally. Use only fresh fluid to refill the master cylinder, not the stuff bled from the
system.
9. When the bleeding process is complete, refill the master cylinder, install its cover and
diaphragm, and discard the fluid bled from the brake system.
10. If the BPMV has been replaced, perform 4 function tests with the TECH 1 scan tool. The
brake pedal must be firmly applied.

11. On models with rear wheel ABS:
A. Refill the jar with clean brake fluid and attach the bleed hose to the bleed valve on the
Isolation/Dump valve.
B. Have your assistant slowly depress the brake pedal and hold it. Loosen the bleed valve
and expel the air. Tighten the valve and slowly release the pedal.
C. Wait 15 seconds and repeat this procedure. Repeat bleeding the Isolation/Dump valve
until all the air is expelled.
12. On models with 4 wheel ABS, repeat Steps 1-9.


Tuolla kuvia:
RWAL brake system diagram
http://arrc.epnet.com/autoapp/8819/chil ... 69g80L.gif
RWAL wiring diagram
http://arrc.epnet.com/autoapp/8819/chil ... 69g81L.gif
RWAL connectors pinouts
http://arrc.epnet.com/autoapp/8819/chil ... 69g82L.gif
4WAL hydraulic >>>>96/97
http://arrc.epnet.com/autoapp/8819/chil ... 69g83L.gif
Three sensor 4WAL brake system (ei 96-97)
http://arrc.epnet.com/autoapp/8819/chil ... 69g84L.gif
Four sensor 4WAL brake system 96-97
http://arrc.epnet.com/autoapp/8819/chil ... 69g85L.gif
Three sensor 4WAL wiring (ei 96-97)
http://arrc.epnet.com/autoapp/8819/chil ... 69g86L.gif
Four sensor 4WAL wiring (ei 96)
http://arrc.epnet.com/autoapp/8819/chil ... 69g87L.gif
4WAL connectors pinout (ei 96-97)
http://arrc.epnet.com/autoapp/8819/chil ... 69g88L.gif
4WAL brake system diagram 96-97
http://arrc.epnet.com/autoapp/8819/chil ... 69g89L.gif
4WAL Wiring 96-97
http://arrc.epnet.com/autoapp/8819/chil ... 69g90L.gif
4WAL connectors pinout 96-97
http://arrc.epnet.com/autoapp/8819/chil ... 69g91L.gif

[Eagle_no1]

Rakentelin tuon mainion luettelon kuvineen PDF muotoon.

http://www.eagle-no1.fi/sharing/brakes.doc.pdf