(LA) Response Code 1-1-3

LA. 1-1-3 Brake and Clutch Valve

This response code is posted when the selector switch is moved from OFF to ON and vice versa, or when the clutch or brake pedal is depressed with the selector switch in the ON position. Fault tracing begins with LA1.

LA1. Response Code Test

If response code 1-1-3 is posted:
Continue with response code 1-2-3.

If response code 1-1-3 is not posted:
Other response codes LA2.



LA2. Other Response Codes

Check whether either response code 1-3-1, 1-2-3 or 2-1-3 can be posted.

If no response code is posted:
Fuse check LA3.

If one of the response codes is posted:
Switch test LA5.



LA3. Fuse Check






Check to see that fuse 19 in the central electronics module inside the car is intact.

If fuse is intact:
Test power supply to selector switch LA4.

If fuse is blown:
Check cables between: fuse 19 and selector switch terminal 2, fuse 19 and control module terminal 1B, selector switch terminal 1 and brake valve.
Automatic transmission: brake valve cable and control module terminal 9E, manual transmission: brake valve and clutch valve, manual transmission: clutch valve and control module terminal 9E.

Selector switch terminal 3 and control module terminal 6E, selector switch terminal 4 and control module terminal 8E, selector switch terminal S and control module terminal 4E for short circuit to ground, according to QA3. (Q) Other Electrical Fault Tracing



LA4. Test Of Power Supply To Selector Switch






Ignition off.
Disconnect selector switch.
Ignition on. Using a voltmeter, measure voltage between selector switch connector terminal 2 and ground.
Voltmeter should display battery voltage.

If reading is OK:
Switch test LA5.

If reading is not OK:
Check cable between fuse 19 in central electronics module on left side of instrument panel and selector switch terminal 2 for breaks, according to QA2.


LA5. Switch Test






Switch connected.
Ignition on. Using a voltmeter, measure the voltage between the selector switch connector terminal 1 and ground.
Voltmeter should display battery voltage with the selector switch in the ON position and about 0 volts with the selector switch in the OFF position.

If reading is OK:
Test power supply to brake valve, selector switch in OFF position LA7.

If reading is not OK:
Switch connector test LA6.


LA6. Switch Connector Test






Ignition off. Service selector switch connector terminals 1 and 2 for contact resistance and oxidation, according to QA6, and for loose connection, according to QA5.
.
Switch connected.
Ignition on.
Switch in ON position. Using a voltmeter, measure voltage between selector switch connector terminal 1 and ground.
Voltmeter should display battery voltage.

If reading is OK:
Test power supply to brake valve, selector switch in OFF position LA7.

If reading is not OK:
Try a new selector switch.


LA7. Test Of Power To Brake Valve, Selector Switch In OFF Position






Disconnect brake valve.
Switch connected.
Ignition on.
Switch in OFF position. Using a voltmeter, measure voltage between the brake valve connector (white/black cable) and ground.
Voltmeter should display about 0 volts.

If reading is OK:
Test cable between selector switch and brake valve LA8.

If reading is not OK:
Check the cable between selector switch and brake valve for short circuit to supply according to QA4.


LA8. Test Of Cable Between Selector Switch And Brake Valve






Ignition off.
Disconnect brake valve connector.
Disconnect selector switch connector. Using an ohmmeter, measure the resistance between the selector switch connector terminal 1 and the brake valve connector (black/white cable).
The ohmmeter should display 0 ohm.

If reading is OK:
Brake valve test LA9.

If reading is not OK:
Check cable between selector switch and brake valve for breaks, according to QA2.


LA9. Brake Valve Test






Ignition off.
Disconnect brake valve.
Selector switch in OFF position. Using an ohmmeter, measure resistance between both brake valve terminal pins.
The ohmmeter should read about 0 ohm with the brake pedal up and infinite resistance with the pedal depressed more than 8 mm.

If readings are OK:
Manual transmission: Test of power supply to clutch valve LA11.
Automatic transmission: test of cable between brake/clutch valve and control module LA16.

If readings are not OK:
Brake valve adjustment LA10.


LA10. Brake Valve Adjustment






Ignition off.
Valves should be closed and must not leak when pedals are up.
Depress pedal so that it is not in contact with the valve.
Pull piston out as far as possible and release pedal slowly.
Plastic tabs in valve will hold piston in the proper position.

If brake valve is OK:
Manual transmission: Test power supply to clutch valve LA12.
Automatic transmission:
Test the cable between brake/clutch valve and control module LA15.

If brake valve is not OK:
Try a new brake valve.


LA11. Test Of Power Supply To Clutch Valve, Selector Switch In OFF Position






Disconnect clutch valve.
Ignition on.
Selector switch in OFF position. Using a voltmeter, measure voltage between clutch valve connector (orange/white cable) and ground.
Voltmeter should display about 0 volts.

If reading is OK:
Test cable between brake valve and clutch valve LA12.

If reading is not OK:
Check cable between brake valve and clutch valve for short circuit to supply, according to QA4.


LA12. Test Of Cable Between Brake Valve And Clutch Valve






Ignition off.
Clutch valve disconnected.
Disconnect brake valve.
Using an ohmmeter, measure resistance between brake valve connector and clutch valve connector (orange/white cable).
Ohmmeter should display about 0 ohm.

If reading is OK:
Clutch valve test LA13.

If reading is not OK:
Check the cable between brake valve and clutch valve for breaks, according to QA2.


LA13. Clutch Valve Test






Ignition off.
Disconnect clutch valve.
Selector switch in OFF position. Using an ohmmeter, measure the resistance between the clutch valve connector pins.
The ohmmeter should display about 0 ohm with the clutch pedal up and infinite resistance with the pedal depressed more than 8 mm.

If readings are OK:
Test power supply to control module LA15.

If readings are not OK:
Clutch valve adjustment LA14.


LA14. Clutch Valve Adjustment






Ignition off. Valves should be closed and must not leak when pedals are up.
Depress pedal so that it is not in contact with valve.
Pull piston out as far as possible and release pedal slowly.
Plastic tabs in valve will hold piston in the proper position.

If brake valve is OK:
Test power supply to control module LA15.

If brake valve is not OK:
Try a new clutch valve.


LA15. Test of power supply to control module






Ignition off.
Disconnect control module.
Ignition on.
Pedals up.
Using a voltmeter, measure voltage between control module socket terminal 9E and ground.
Voltmeter should display about 0 volts with selector switch in OFF position and battery voltage with selector switch in ON position.

If reading is OK:
Test of line between brake/clutch valve and control module LA16.

If voltmeter displays battery voltage even with selector switch in OFF position:
Check the cable between brake valve connector (automatic transmission) or clutch-valve connector (manual transmission) and control module socket terminal 9E for short circuit to supply, according to QA4.



LA16. Test Of Cable Between Brake/Clutch Valve And Control Module






Ignition off.
Control module disconnected.
Disconnect brake valve (automatic transmission) or clutch valve (manual transmission).
Connect an ohmmeter between control module socket terminal 9E and brake/clutch valve connector (orange/black cable).
The ohmmeter should display about 0 ohm.

If reading is OK:
Connector test LA17.

If reading is not OK:
Check the cable between the brake or clutch valve (orange/black cable) and control module socket terminal 9E for breaks, according to QA2.

LA17. Connector Test

Ignition off.
Service control module socket terminal 9E and selector switch connector terminals 1 and 2 and the two-pin connector (A25) for contact resistance and oxidation, according to QA6, and for loose connections, according to QA5.

Brake/clutch valve connected.
Control module connected.
Ignition on.
Check whether response code 1-1-3 is posted.

If code is posted:
The response code was not posted due to poor contact in connectors.

If code is not posted:
Try a new control module.