Manual Temperature Control

B100C - Floor Mode Switch Request Input Circuit Performance

For a complete wiring diagram, refer to.

Theory of Operation

The Floor mode switch input changes when the switch is pushed down. An active DTC indicates that the switch is stuck in a pushed position. A stored DTC indicates that the switch was stuck in a pushed position for more than two minutes, but has since returned to its normal state.

• When Monitored: With the ignition on.

• Set Condition: If the Floor mode switch is stuck in a pushed position for more than two minutes. This DTC has a maturing time of two minutes and a de-maturing time of two seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.






• This DTC must be active for the results of this test to be valid. Do not perform this test if this DTC is stored.

Test Step 1 - Inspect for Object Holding Switch in a Pushed Position

• Inspect the A/C Heater Control for an object holding the switch in a pushed position. If present, remove the object.

• Turn the ignition ON.

• With the scan tool, erase HVAC DTCs.

• Turn the ignition OFF, wait 10 seconds, and then turn the ignition ON.

• Wait two minutes, then with the scan tool, read HVAC DTCs.

Does the scan tool display this DTC as active?

Yes

• Replace the A/C heater control.

• Perform the HVAC Verification Test. Refer to => Non-DTC Based Diagnostics. HVAC Verification Test

No

• Replace the A/C heater control.

• Perform the HVAC Verification Test. Refer to => Non-DTC Based Diagnostics. HVAC Verification Test