Test K

PINPOINT TEST K: THE BLOWER MOTOR IS INOPERATIVE - EMTC

Test K1-K3:

Test K4-K6:

Test K7-K9:

Test K9-K11:

Test K11-K13:

Test K13 Continued:

Normal Operation
Under normal operation, when blower operation is requested a signal is sent from the control module to the Smart Junction Box (SJB) through circuit 1398 (PK/WH) (Single-zone EMTC only) or over the SCP BUS (Dual-zone EMTC only). The SJB sends a message over the SCP bus to the PCM.

The blower motor relay coil receives ignition voltage through circuit 298 (VT/OG). The coil receives ground from the Smart Junction Box (SJB) through circuit 1322 (BN/WH) if any position but OFF is selected. Voltage is supplied to the relay switch contact through circuit 364 (BK/LG). When the relay coil is energized, voltage is delivered to the blower motor through circuit 371 (PK/WH). Ground for the blower motor is provided through circuit 261 (OG/BK) from the blower resistor or the blower switch (HI). The blower resistor and blower switch is grounded through circuit 1205 (BK).

Possible Causes
- An open in circuit 1322 (BN/WH), 261 (OG/BK), 1205 (BK), 371 (PK/WH), 1398 (PK/WH), 364 (BK/LG) or 298 (VT/OG).
- Blower motor.
- Blower motor relay.
- Blower motor switch.
- Blower motor resistor.
- SJB.