B1016-REAR DEFROST SWITCH REQUEST INPUT CIRCUIT LOW (CCN)
For a complete wiring diagram Refer to Section 8W.
Theory of Operation
The switch input changes when the switch is pushed down. A stored DTC B1016 indicates that the Electronic Back Light (EBL) mode switch was stuck in a pushed position for more than 10 minutes, but has since returned to its normal state. An active DTC B1016 indicates that the EBL mode switch is stuck in a pushed position. An active DTC B1016 will prevent proper EBL mode switch and status indicator function.
- When Monitored:
With the ignition on.
- Set Condition:
If the EBL mode switch stays in a pushed position for more than 10 minutes.
| Possible Causes |
| OBJECT HOLDING ELECTRONIC BACK LIGHT (EBL) MODE SWITCH IN A PUSHED POSITION |
| SUBSTANCE CAUSING EBL MODE SWITCH TO GET STUCK IN A PUSHED POSITION |
| A/C HEATER CONTROL |
Diagnostic Test
1. INSPECT THE A/C HEATER CONTROL FOR DAMAGEInspect the A/C Heater Control for damage.
Is the A/C Heater Control damaged?
Yes
- Replace the A/C Heater Control in accordance with the Service Information.
- Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No
- Go To 2
2. INSPECT FOR OBJECT OR SUBSTANCE CAUSING THE EBL MODE SWITCH TO STAY OR STICK IN A PUSHED POSITION
Inspect the A/C Heater Control for anything that would cause the EBL mode switch to stay or stick in a pushed position.
Is anything present that would cause the EBL mode switch to stay or stick in a pushed position?
Yes
- Repair as necessary.
- Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No
- Go To 3
3. CHECK FOR NORMAL EBL MODE SWITCH AND STATUS INDICATOR FUNCTION
Turn the ignition on.
Press the EBL mode switch on and off several times while observing the EBL status indicator.
Does the EBL status indicator turn on and off?
Yes
- Go To 4
No
- Replace the A/C Heater Control in accordance with the Service Information.
- Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
4. VERIFY THAT DTC B1016–REAR DEFROST SWITCH REQUEST INPUT CIRCUIT LOW IS STILL ACTIVE
With the scan tool, erase DTCs.
Turn the ignition off, wait 10 seconds, and then turn the ignition on. Wait 10 minutes before proceeding.
With the scan tool, read DTCs.
Does the scan tool display active: B1016–REAR DEFROST SWITCH REQUEST INPUT CIRCUIT LOW?
Yes
- Replace the A/C Heater Control in accordance with the Service Information.
- Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No
- Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).