B1016–REAR DEFROST SWITCH REQUEST INPUT CIRCUIT LOW (CCN)
For a complete wiring diagram Refer to Section 8W.
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When Monitored:
With ignition on, and the rear Defroster Grid activated.
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Set Condition:
When the Instrument Cluster (CCN) detects a low condition on the Rear Window Defogger Switch Signal circuit..
Possible Causes
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(C215) REAR WINDOW DEFOGGER SWITCH SIGNAL CIRCUIT SHORTED TO GROUND
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INSTRUMENT CLUSTER (CCN)
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HVAC CONTROL MODULE
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1.
VERIFY REAR DEFROST SWITCH REQUEST INPUT CIRCUIT LOW IS ACTIVE
Turn the ignition on.
With the scan tool, check for DTCs.
Does the scan tool display this DTC as active?
Yes
No
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The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced,
pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary.
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Perform the BODY VERIFICATION TEST – VER 1.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
2.
CHECK FOR DTC WITH THE A/C HEATER CONTROL DISCONNECTED
Turn the ignition off.
Disconnect the A/C Heater Control C1 harness connector.
Turn the ignition on.
Using the scan tool, check for DTC's
Does the scan tool display this DTC as active?
Yes
No
3.
CHECK THE (C215) REAR WINDOW DEFOGGER SWITCH SIGNAL CIRCUIT FOR SHORT TO GROUND
Disconnect the Instrument Cluster (CCN) C3 harness connector.
Using an ohm meter measure the resistance from the (C215) Rear Window Defogger Switch Signal circuit to ground.
Does the ohm meter read open circuit?
Yes
No