Pinpoint Test 1: The Speed Control Is Inoperative

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PINPOINT TEST 1: THE SPEED CONTROL IS INOPERATIVE - HYBRID

Normal Operation

The PCM sends a signal through circuit (W) to the speed control switches, which passes through the clockspring. The return signal is sent through circuit (G/BR) and the clockspring.

- DTC P0579 Cruise Control Multifunction Input A Circuit Range/Performance - may set when the speed control switch circuits are open, shorted to voltage or shorted to ground.
- DTC P0581 Cruise Control Multifunction Circuit High - sets when the speed control switch circuits are shorted to voltage or open.

Possible Causes
- Fuse
- Wiring, terminals or connectors
- Clockspring
- PCM
- Speed control switch

Diagnostic Procedure

CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connectors.

Step 1-Step 4:

Step 5-Step 9:

Step 10-Step 14: