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Symptom:
A/C BLEND DOOR INPUT SHORTED TO BATTERY - MTC
When Monitored and Set Condition:
A/C BLEND DOOR INPUT SHORTED TO BATTERY - MTC
When Monitored: With the engine running.
Set Condition: The BCM reads the signal from the A/C - Heater Control blend request
and positions the blend door accordingly. If the voltage on this pin exceeds 90% of ignition
voltage, the DTC will set, and the BCM will place the blend door in a default position.
CONTROL HEAD - TEMPERATURE SELECT SIGNAL SHORTED TO VOLTAGE
TEMPERATURE SELECT SIGNAL CIRCUIT SHORTED TO VOLTAGE
BODY CONTROL MODULE - TEMPERATURE SELECT SIGNAL SHORTED TO VOLTAGE
TEST
1
With the DRBIII , record and erase Body Computer DTC's.
Turn the ignition off.
Disconnect the A/C - Heater Control C1 harness connector.
Turn the ignition on.
Measure the voltage of the Temperature Select Signal circuit.
Is the voltage above 0.3 volts?
Yes → Go To 2
→ Replace the A/C - Heater Control in accordance with the Service
No
2
Turn the ignition off.
Disconnect the A/C - Heater Control C1 harness connector.
Disconnect the Body Control Module C2 harness connector.
Turn the ignition on.
Measure the voltage of the Temperature Select Signal circuit.
Is there any voltage present?
Yes → Repair the Temperature Select Signal circuit for a short to
→ Replace and program the Body Control Module in accordance
No
POSSIBLE CAUSES
ACTION
Information.
Calibration must be performed after repair/replacement is com-
pleted.
Perform BODY VERIFICATION TEST - VER 1.
voltage.
Calibration must be performed after repair/replacement is com-
pleted.
Perform BODY VERIFICATION TEST - VER 1.
with the Service Information.
Calibration must be performed after repair/replacement is com-
pleted.
Perform BODY VERIFICATION TEST - VER 1.
265
HEATING & A/C
APPLICABILITY
All
All
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