Diagnostic Aids
If the clutch pedal feels spongy when depressed, check for a faulty master cylinder or a faulty clutch actuator.
Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
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This step explains there parts and the operation of the clutch system.
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This step inspects for a faulty master cylinder.
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This step inspects for a faulty clutch actuator.
Step | Action | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|
DEFINITION: The clutch pedal feels spongy when depressed. | |||||||||
Did you review the clutch symptom operations and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Clutch | |||||||
2 | Inspect the fluid level in the master cylinder reservoir. Is the fluid level low? | Go to Step 4 | Go to Step 3 | ||||||
3 | Fill the reservoir with clean brake fluid. Is the reservoir properly filled? | Go to Step 4 | -- | ||||||
4 | Bleed the clutch hydraulic system. Refer to Hydraulic Clutch Bleeding . If the vehicle is equipped with the ZF S6-650 manual transmission there is no bleeding required, you must manually pull up the clutch pedal and pump the system 25 times. Does the clutch system work? | System OK | Go to Step 5 | ||||||
Inspect the clutch master cylinder. Is the master cylinder faulty? | Go to Step 6 | Go to Step 7 | |||||||
6 | Replace the clutch master cylinder. Refer to Master Cylinder Replacement . Does the clutch work now? | System OK | Go to Step 7 | ||||||
Is the clutch actuator faulty? | Go to Step 8 | System OK | |||||||
8 | Replace the clutch actuator. Refer to Clutch Concentric Actuator Cylinder Replacement . Did you find and repair the condition? | Go to Step 9 | Go to Diagnostic Aids | ||||||
9 |
Did you correct the condition? | System OK | Go to Step 1 | ||||||
