Diagnostic Procedure
WARNING: This page is about a different car, the 2005 Dodge Stratus and 2005 Chrysler Sebring. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC PROCEDURES - A/C BLEND DR INPUT OPEN/SHORT TO GROUND - MTC
| TEST | ACTION | APPLICABILITY |
|---|---|---|
| 1 | Turn the ignition on. With the DRBIII® read the Body Computer DTCs. Are Mode Door Input Open/STG and Blend Door Input Open/STG DTCs present? (May set TCM Msg Not Recd). Yes --> If JB Fuse 11 is open, check for short to ground in Junction Block, BCM, and Fused Ign Sw Output Ckt. If JB Fuse 11 is not open, check for an open between JB Fuse 11 Pin 19, and JB C7-10 harness connector, and splice 210 in Fused Ign Sw Output Ckt. Calibration must be performed after repair/replacement is completed. Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 2 |
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| 2 | Turn the ignition off. Disconnect the A/C - Heater Control C1 harness connector. Turn the ignition on. Using a 12-volt test light connected to ground, probe the Fused Ignition Switch Output circuit. Is the test light illuminated? Yes --> Go To 3 No --> Repair the Fused Ignition Switch Output circuit for an open. Calibration must be performed after repair/replacement is completed. Perform BODY VERIFICATION TEST - VER 1 . |
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| 3 | Turn the ignition off. Disconnect the A/C - Heater Control C1 harness connector. Disconnect the Body Control Module C2 harness connector. Measure the resistance between ground and the Temperature Select Signal circuit. Is the resistance below 10K ohms? Yes --> Repair the Temperature Select Signal circuit for a short to ground. Calibration must be performed after repair/replacement is completed. Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 4 |
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| 4 | Turn the ignition off. Disconnect the A/C - Heater Control C1 harness connector. Disconnect the Body Control Module C2 harness connector. Measure the resistance between the Sensor Ground circuit and the Temperature Select Signal circuit at the A/C - Heater Control C1 harness connector. Is the resistance below 10K ohms? Yes --> Repair the Temperature Select Signal circuit for a short to the Sensor Ground circuit. Calibration must be performed after repair/replacement is completed. Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 5 |
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| 5 | Turn the ignition off. Disconnect the A/C - Heater Control C1 harness connector. Disconnect the Body Control Module C2 harness connector. Measure the resistance of the Temperature Select Signal circuit between the A/C - Heater Control C1 harness connector and the BCM C2 harness connector. Is the resistance below 5.0 ohms? Yes --> Go To 6 No --> Repair the Temperature Select Signal circuit for an open. Calibration must be performed after repair/replacement is completed. Perform BODY VERIFICATION TEST - VER 1 . |
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| 6 | Turn the ignition off. Reconnect the A/C - Heater Control C1 harness connector. Disconnect the Body Control Module C2 harness connector. Put the Blend Control switch in the full cold position. Turn the ignition on. Measure the voltage of the Temperature Select Signal circuit. Move the Blend Control switch from full cold to full hot while observing the voltmeter. Does the voltage change fluidly from approximately 9.0 volts (full cold) to 11.89 volts (full hot)? Yes --> Replace and program the Body Control Module in accordance with the Service Information. Calibration must be performed after repair/replacement is completed. Perform BODY VERIFICATION TEST - VER 1 . No --> Replace the A/C - Heater Control in accordance with the Service Information. Calibration must be performed after repair/replacement is completed. Perform BODY VERIFICATION TEST - VER 1 . |
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