Turbo Gauge

Disconnect turbo gauge. Hook up wires of a regulated voltage supply to turbo gauge. When supplied with 1.20-1.22 volts, gauge needle should be at the "-" or no boost position.
When provided with 2.15-2.23 volts, gauge should register at "0" point. When provided with 3.34-3.54 volts, gauge should indicate the "+" position. Replace gauge if it responds incorrectly.

Fig 1: Instrument Cluster Trouble Shooting Charts (XT Coupe)

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Fig 2: Instrument Cluster Trouble Shooting Charts (XT Coupe)

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Fig 3: Instrument Cluster Trouble Shooting Charts (XT Coupe)

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Fig 4: Instrument Cluster Trouble Shooting Charts (XT Coupe)

Courtesy of SUBARU OF AMERICA, INC.