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Symptom List: A/C SWITCH FAULT (ACTIVE) - MTC Test Note: All symptoms listed above are diagnosed using the same tests. The title for the tests will be A/C SWITCH FAULT (ACTIVE) - When Monitored and Set Condition: A/C SWITCH FAULT (ACTIVE) - MTC When Monitored: With the ignition on. Set Condition: This DTC will set if the A/C mode switch stays closed for 10 minutes. CHECKSUM FAILURE (ACTIVE) - MTC When Monitored: With the ignition on. Set Condition: This DTC will set if the calculated check sum does not match the stored value. DEFOG SWITCH FAULT (ACTIVE) - MTC When Monitored: With the ignition on. Set Condition: This DTC will set if the EBL mode switch stays closed for 10 minutes. LOOPBACK TEST FAILURE (ACTIVE) - MTC When Monitored: When the A/C Heater Control executes an internal loopback test. Set Condition: If the A/C Heater Control either fails to broadcast a message on the PCI Bus or fails to receive expected messages from the PCI Bus for 5 seconds it will execute an POWER SWITCH FAULT (ACTIVE) - MTC When Monitored: With the ignition on. Set Condition: This DTC will set if the Power switch stays closed for 10 minutes. RECIRC SWITCH FAULT (ACTIVE) - MTC When Monitored: With the ignition on. Set Condition: This DTC will set if the Recirc mode switch stays closed for 10 minutes. 525 HEATING & A/C |