Check No. 3, Int Variation Switch Input Test

1. Ensure terminal voltage is 0-2.5 volts at ECU connector terminal 13, on models without theft alarm, or terminal 15, on models with theft alarm, with intermittent variable volume switch turned from Fast to Slow.
2. Ensure continuity is 0 to 1000 ohms between ECU connector terminal 13 and ground, on models without theft alarm, or terminal 15 and ground, on models with theft alarm, intermittent variable volume switch turned from Fast to Slow.