Cruise Control Input Test

NOTE: Always make sure that you have the latest Honda Diagnostic System (HDS) software.

Connect the HDS to the data link connector (DLC) (see step 2 on GENERAL TROUBLESHOOTING INFORMATION ).
Turn the ignition switch to ON (II).
Make sure the HDS communicates with the vehicle and the powertrain control module (PCM). If it does not communicate, troubleshoot the DLC circuit (see DLC CIRCUIT TROUBLESHOOTING ).
Go to PGM-FI, and check for DTCs (see GENERAL TROUBLESHOOTING INFORMATION ).
Do the following tests while monitoring parameters in the PGM-FI DATA LIST with the HDS.
If the input tests prove OK, replace the PCM (see PCM REPLACEMENT

NOTE: Intermittent failures are often caused by loose circuit connections. While monitoring cruise control inputs, flex or wiggle the harness/circuits, and note if any of the test results change.

TEST CONDITION TABLE

Signal to be tested	Test condition	Parameter: Desired result	Possible cause if result is not obtained
Brake pedal position switch signal	Brake pedal pressed, then released	CRUISE BRAKE SW should indicate OFF when the brake pedal is pressed and ON when the brake pedal is released.	Faulty brake pedal position switch Blown No. 3(10 A) fuse in the under-dash fuse/relay box An open in the wire between the PCM and the brake pedal position switch A wire shorted to ground between the PCM and the brake pedal position switch
Transmission range switch signal	Shift lever in D and D3	SHIFT/CLUTCH SW should indicate ON in P, R, N, 2, and 1 and OFF in D and D3.	Faulty transmission range switch An open in the wire between the PCM and the transmission range switch A wire shorted to ground between the PCM and the transmission range switch Poor ground G101
Cruise control main switch signal	Cruise control main switch pressed and released	CRUISE MASTER (MAIN) SW should indicate ON when the cruise control main switch is pressed and OFF when the cruise control main switch is released.	Faulty cruise control combination switch An open in the wire between the gauge control module and the cruise control combination switch A wire shorted to ground between the gauge control module and the cruise control combination switch An open in the wire between the cruise control combination switch and the ground
Set switch signal	Set/decel switch pressed and released	CRUISE SET SW should indicate ON when the set/decel switch is pressed and OFF when the set/decel switch is released.	Faulty cruise control combination switch An open in the wire between the gauge control module and the cruise control combination switch A wire shorted to ground between the gauge control module and the cruise control combination switch
Resume switch signal	Resume/accel switch pressed and released	CRUISE RESUME SW should indicate ON when the resume/accel switch is pressed and OFF when the resume/accel switch is released.	Faulty cruise control combination switch An open in the wire between the gauge control module and the cruise control combination switch A wire shorted to ground between the gauge control module and the cruise control combination switch
Cancel switch signal	Cancel switch pressed and released	CRUISE CANCEL SW should indicate ON when the cancel switch is pressed and OFF when the cancel switch is released.	Faulty cruise control combination switch An open in the wire between the gauge control module and the cruise control combination switch A wire shorted to ground between the gauge control module and the cruise control combination switch
Cruise control indicator signal	Start the engine, press the cruise control main switch on, and drive the vehicle above 25 mph (40 km/h) with the cruise control set and cancel the cruise control	CRUISE INDICATOR should indicate ON when the cruise control is set and OFF when the cruise control is cancelled.	Faulty gauge control module Faulty Cruise Control Combination switch. An open in the wire between the gauge control module and the cruise control module switch A wire shorted to ground between the gauge control module and the cruise control combination switch.