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 HEAD, EBL INPUT SHORTED TO GROUND - MTC

TEST	ACTION	APPLICABILITY
1	Turn the ignition on. Put the Mode Control switch in the Recirc/Bi-Level (full left) position. With the DRBIII®, record and erase Body Computer DTC's. With the DRBIII® in Sensor Display, read the A/C EBL voltage. Is the voltage below 0.5 volts? Yes --> Go To 2 No --> Go To 6	All
2	Turn the ignition off. Disconnect the A/C - Heater Control C1 harness connector. Turn the ignition on. With the DRBIII® in Sensor Display, read the A/C EBL voltage. Is the voltage above 3.0 volts? Yes --> 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 . No --> Go To 3	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 Switch Sense circuit. Is the resistance below 10K ohms? Yes --> Repair the A/C Switch Sense 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 Switch Sense circuit at the A/C - Heater Control C1 harness connector. Is the resistance below 10K ohms? Yes --> Repair the A/C Switch Sense 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	If there are no possible causes remaining, view repair. Repair 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 .	All
6	Turn the ignition on. With the DRBIII®, record and erase DTCs. Ensure that the Rear Window Defogger is off. Put the Mode Control switch in the Recirc/Bi-Level (full left) position. Start the engine. With the DRBIII® in Sensor Display, read the A/CABLE Switch voltage and the Mode Switch voltage in each door position. Look for the following approximate voltage readings: Recirc-A/C position: A/C EBL Switch, 4.42 volts, Mode Switch, 1.32 volts. Panel-A/C position: A/C EBL Switch, 4.42 volts, Mode Switch, 3.20 volts. Mix-A/C position: A/C EBL Switch 4.42 volts, Mode Switch 5.07 volts. Panel-Heater position: A/C EBL Switch 10.79 volts, Mode Switch 3.20 volts. Mix-Heater position: A/C EBL Switch 10.79 volts, Mode Switch 5.07 volts. Floor-Heater position: A/C EBL Switch 10.79 volts, Mode Switch 7.16 volts. Does DRBIII® display the approximate voltages for each Mode Control switch position? Yes --> Go To 7 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
7	Turn the ignition on. With the DRBIII®, erase DTCs. Start the engine. Turn the Blower Control switch on. With the DRBIII®, read DTCs while slowly turning the Mode Control switch to each of the door positions several times. Does the DRBIII® display: A/C Head, EBL Input Shorted to Ground? 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 --> Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for conditions causing an intermittent short. Calibration must be performed after repair/replacement is completed. Perform BODY VERIFICATION TEST - VER 1 .	All