B1016

B1016-REAR DEFROST SWITCH REQUEST INPUT CIRCUIT LOW (ATC & MTC)


Theory of Operation
The Rear Defrost 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 Rear Defrost 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.

POSSIBLE CAUSES
- Object holding switch in a pushed position
- A/C heater control

NOTE: This DTC must be active for the results of this test to be valid. Do not perform this test if this DTC is stored. Refer to either HVAC System Test (ATC) or HVAC System Test (MTC) for stored DTC test procedures.

Diagnostic Test

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.

Q: Does the scan tool display active: B1016-REAR DEFROST SWITCH REQUEST INPUT CIRCUIT LOW?

YES: Replace the A/C Heater Control.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Perform BODY VERIFICATION TEST - VER 1. Body Verification Test