Clutch Interlock/Upstop Switch

WARNING: When there is a loss of clutch system hydraulic fluid, or the clutch master cylinder pushrod is disconnected from the pedal lever, the engine may start with the clutch engaged, causing undesirable vehicle movement if the transaxle is in any gear.

The switch assembly is located in the clutch/brake pedal bracket assembly. See Fig 1 . The clutch interlock/upstop switch is an assembly consisting of two switches: an engine starter inhibit switch (interlock) and a clutch pedal upstop switch. See Fig 2 . The clutch interlock switch prevents engine starter operation and inadvertent vehicle movement with the clutch pedal in the up position (not depressed), or under normal conditions with the clutch engaged and the transaxle in gear.

The switch is open while the clutch pedal is at rest (up position). When the clutch pedal is fully depressed, the pedal lever closes the switch, completing the signal circuit from the PCM and closing the ground path, allowing engine starter operation. The interlock switch is not adjustable.

Fig 1: Locating Clutch Interlock Switch/Unlock Switch

Courtesy of CHRYSLER CORP.

Fig 2: Identifying Clutch Interlock & Unstop Switch's

Courtesy of CHRYSLER CORP.