Part 2
Checking ON/OFF selector switch, brake valve and clutch valve (Continued)
Checking cable between selector switch and brake valve
- Ignition off.
- Brake valve disconnected.
- Disconnect selector switch.
- Connect an ohmmeter between selector switch connector terminal 1 and brake valve connector terminal 2.
The ohmmeter should read 0 ohms.
OK - Checking the brake valve
Not OK - Checking for an open-circuit
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Checking for an open-circuit
- Ignition off.
- Check the cable between selector switch connector terminal 1 and brake valve terminal 2 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Continue - Verification
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Checking the brake valve
- Ignition off.
- Brake valve disconnected.
- Connect selector switch.
- Selector switch in OFF position.
- Connect an ohmmeter between both brake valve connecting pins.
The ohmmeter should read approx. 0 ohms with the brake pedal up and infinite resistance with the pedal depressed more than 8 mm.
OK - Fault-tracing information
Not OK - Brake valve adjustment
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Fault-tracing information
- The clutch valve is only fitted to cars with a manual transmission so the transmission type must be entered to continue testing.
Does the car have a manual transmission?
Yes - Checking power supply to clutch valve
No - No Fault Found
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Brake valve adjustment
- Ignition off.
- Brake valve disconnected.
- Press pedal so that it is not in contact with the valve.
- Pull piston out as far as possible and release pedal slowly.
- Connect an ohmmeter between both brake valve connecting pins.
The ohmmeter should read approx. 0 ohms with the brake pedal up and infinite resistance with the pedal depressed more than 8 mm.
OK - Verification
Not OK - Replacing component
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Replacing component
- Ignition off.
- Try a new brake valve according to Replacing brake and clutch valves Service and Repair.
Continue - Verification
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Checking power supply to clutch valve
- Ignition off.
- Disconnect clutch valve.
- Ignition on.
- Selector switch in OFF position.
- Connect a voltmeter between clutch valve connector terminal 2 and ground.
The voltmeter should read approx. 0 V.
OK - Checking cable between brake valve and clutch valve
Not OK - Checking for a short-circuit
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Checking for a short-circuit
- Ignition off.
- Check cable between brake valve connector terminal 1 and clutch valve connector terminal 2 for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Continue - Verification
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Checking cable between brake valve and clutch valve
- Ignition off.
- Clutch valve disconnected.
- Brake valve disconnected.
- Connect an ohmmeter between brake valve connector terminal 1 and clutch valve terminal 2.
The ohmmeter should read approx. 0 ohms.
OK - Checking the clutch valve
Not OK - Checking for an open-circuit
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Checking for an open-circuit
- Ignition off.
- Check cable between brake valve connector terminal 1 and clutch valve connector terminal 2 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Continue - Verification
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Checking the clutch valve
- Ignition off.
- Clutch valve disconnected.
- Selector switch in OFF position.
- Connect an ohmmeter between both clutch valve terminal pins.
The ohmmeter should read approx. 0 ohms with the clutch pedal up and infinite resistance with the pedal depressed more than 8 mm.
OK - Clutch valve adjustment
Not OK - Checking power supply to the control module
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Clutch valve adjustment
- Ignition off.
- Clutch valve disconnected.
- Press pedal so that it is not in contact with the valve.
- Pull piston out as far as possible and release pedal slowly.
- Connect an ohmmeter between both clutch valve terminal pins.
The ohmmeter should read approx. 0 ohms with the clutch pedal up and infinite resistance with the pedal depressed more than 8 mm.
OK - Checking power supply to the control module
Not OK - Replacing component
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Replacing component
- Ignition off.
- Try a new clutch valve according to Replacing brake and clutch valves Service and Repair.
Continue - Verification
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