Temperature Safety Switch
- Wastegate frequency valve must be okay before testing temperature safety switch. Disconnect harness connector from wastegate frequency valve. Using a LED Test Light (US 1115
), connect Red lead to Blue/Black wire and Black lead to Green/Yellow wire.
- Start and idle engine. Unplug throttle switch. Using a jumper wire, briefly short across throttle switch terminals No. 2 and 3. See Figure
. LED test light must be on for about 2 seconds. Remove jumper wire from throttle switch. If LED test light did not come on, replace temperature safety switch.
- If LED test light came on, disconnect plug from temperature safety switch. Using a jumper wire, connect terminal R to ground. See Fig 1
. Using a jumper wire, briefly short across throttle switch terminals No. 2 and 3. See Figure
. LED test light must NOT be on or flash.
- If not as specified, check circuits between temperature safety switch and ECU.
Courtesy of AUDI OF AMERICA, INC.