Pinpoint Test B: DTC P1703

Speed Control

Pinpoint Test B: DTC P1703

Refer to Wiring Diagram Set 31, Speed Control for schematic and connector information. Diagrams By Number

Normal Operation

When the brake pedal is applied, the stoplamp switch closes and sends voltage to the PCM on circuit CCB08 (VT/WH) to deactivate the speed control, if engaged.

The speed control deactivator switch (part of the stoplamp switch) receives voltage on circuit CBB76 (BU/BN) and interrupts circuit CES09 (VT/OG) removing the voltage signal to the PCM when the brake pedal is applied firmly and passes the speed control deactivator switch point. This is a redundant signal to the PCM.

- DTC P1703 (Brake Switch Out Of Self Test Range) - sets when there is an open or short in the deactivator switch circuits or when there is an open or short in the stoplamp circuits.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- Speed control deactivator switch (integral to the stoplamp switch)
- PCM



PINPOINT TEST B: DTC P1703

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

B1-B4:

B4-B6:

B6-B8: