Test M

PINPOINT TEST M : THE BLOWER MOTOR DOES NOT OPERATE CORRECTLY

Test M1-M2:

Test M3:

Test M4-M5:

Test M6-M7:

Test M8:

Normal Operation
Under normal operation, the blower motor control module receives a 1-2 volt signal from the DATC module through circuit 776 (OG/BK) to determine the desired blower motor speed. The DATC module receives a feedback voltage from the blower motor control module through circuit 937 (RD/WH) to determine actual blower motor speed. When the highest blower motor setting is selected, the DATC module sends 12 volts to the blower control module through circuit 755 (BN/WH).

Possible Causes
- An open, short to voltage, ground or together in circuits 776 (OG/BK), 937 (RD/WH) or circuit 755 (BN/WH).
- Blower motor control module.
- DATC module.