scion Workshop Repair Guides

Scion Workshop Service and Repair Manuals

Relays and Modules - Instrument Panel > < Control Module HVAC|Testing and Inspection|Page 71
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2. wave form 2:

Measure the wave form between terminals C4-14 (SPD) and the C4-9 (GND) when turning the rear wheel slowly.

OK:  A wave form should be output as shown in the illustration.

HINT:  As vehicle speed increases, the cycle of the signal wave form narrows.

Relays and Modules - Instrument Panel > < Control Module HVAC|Testing and Inspection|Page 71