CLUTCH PEDAL Switch and diesel engine control
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RAVE manual, page 420:
The clutch pedal switch is located on the clutch master cylinder and is activated when the clutch pedal is operated.
The ECM uses the signal from the clutch pedal switch to provide surge damping during gear change. Surge
damping stops engine speed rising dramatically (engine flaring) during gear change. Surge damping assists
driveability as follows:
• Smoother gear change.
• Greater exhaust gas emission control.
• Improved fuel consumption.
Input / Output
When the clutch pedal is in the rest position, the clutch switch is closed. This allows a feed to flow from the switch
(C0667-1) to the ECM (C0658-35) on a black/white wire. When the clutch pedal is pressed the switch contacts
open, cutting the feed to the ECM.
The clutch pedal switch can fail in any one of the following ways:
• Switch open circuit.
• Short circuit to vehicle supply.
• Short circuit to vehicle earth.
In the event of a clutch pedal switch failure surge damping will be inactive.
RAVE manual, page 420:
The clutch pedal switch is located on the clutch master cylinder and is activated when the clutch pedal is operated.
The ECM uses the signal from the clutch pedal switch to provide surge damping during gear change. Surge
damping stops engine speed rising dramatically (engine flaring) during gear change. Surge damping assists
driveability as follows:
• Smoother gear change.
• Greater exhaust gas emission control.
• Improved fuel consumption.
Input / Output
When the clutch pedal is in the rest position, the clutch switch is closed. This allows a feed to flow from the switch
(C0667-1) to the ECM (C0658-35) on a black/white wire. When the clutch pedal is pressed the switch contacts
open, cutting the feed to the ECM.
The clutch pedal switch can fail in any one of the following ways:
• Switch open circuit.
• Short circuit to vehicle supply.
• Short circuit to vehicle earth.
In the event of a clutch pedal switch failure surge damping will be inactive.
P0704
P0704 GMC Description When the clutch pedal is depress the voltage signal from the clutch switch to the Engine Control Module (ECM) is low. If the ECM does not see this change from high to low when the vehicle is over 0 mph, the ECM sets code P0704.
Read more: http://engine-codes.com/p0704_gmc.html#ixzz1slHvnEKe
Read more: http://engine-codes.com/p0704_gmc.html#ixzz1slHvnEKe