Code 31 - Vacuum Switch Signal

There is an open or short circuit in the vacuum switches signal (VSW1, VSW2),

Trouble Area:

• No. 1 or No. 2 vacuum switches signal
• No. 1 or No. 2 vacuum switches
• ECU

Fig 1: Code 31 - Vacuum Switch Signal Schematic

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Code 31 - Vacuum Switch Signal Flow Chart

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002