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 MODE DOOR 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 |
All |
| 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 . |
All |
| 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 A/C Mode Switch Mux circuit. Is the resistance below 10K ohms? Yes --> Repair the A/C Mode Switch MUX 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 |
All |
| 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 A/C Mode Switch MUX circuit at the A/C - Heater Control C! harness connector. Is the resistance below 10K ohms? Yes --> Repair the A/C Mode Switch MUX 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 |
All |
| 5 | Turn the ignition off. Reconnect the A/C - Heater Control C1 harness connector. Disconnect the Body Control Module C2 harness connector. Measure the resistance of the A/C Mode Switch MUX 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 A/C Mode Switch MUX circuit for an open. Calibration must be performed after repair/replacement is completed. Perform BODY VERIFICATION TEST - VER 1 . |
All |
| 6 | Turn the ignition off. Reconnect the A/C - Heater Control C1 harness connector. Disconnect the Body Control Module C2 harness connector. Put the Mode Control switch in the Recirc/Bi-Level (full left) position. Turn the ignition on. Measure the voltage of the A/C Mode Switch MUX circuit. Move the Mode Control switch from Recirc to Defrost while observing the voltmeter. Does the voltage change fluidly from approximately 8.8 volts (Recirc) to 11.7 volts (Defrost)? 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 . |
All |