TEST
ACTION
APPLICABILITY
3
Replace IPM Fuse #12.
Turn the ignition on.
Turn the Power switch on the A/C - Heater Control Module on.
Turn the rear blower on and operate it in all speeds and modes.
Does the blower motor operate properly without blowing the fuse?
All
Yes
→ Check the Fused Rear Blower Motor Relay Output circuit for an
intermittent short to ground. Repair as necessary.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 4
4
Turn the ignition off.
Disconnect the Rear Blower Motor 2-pin harness connector.
Measure the resistance between ground and the Fused Rear Blower Motor Relay
Output circuit.
Is the resistance below 10K ohms?
All
Yes
→ Repair the Fused Rear Blower Motor Relay Output circuit for a
short to ground. Replace IPM Fuse #12.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Rear Blower Motor in accordance with the Service
Information. Replace IPM Fuse #12
Perform BODY VERIFICATION TEST - VER 1.
5
Ensure IPM Fuse #12 is installed.
Disconnect the Rear Blower Front Control Switch harness connector.
Turn the ignition on.
Turn the Power switch on the A/C - Heater Control Module on.
NOTE: The test light must illuminate brightly. Compare the brightness to
that of a direct connection to the battery.
Using a 12-volt test light connected to ground, back probe the Rear Blower Motor
High circuit in the Rear Blower Front Control Switch harness connector.
Does the test light illuminate brightly?
All
Yes
→ Go To 6
No
→ Go To 7
6
Turn the ignition off.
Disconnect the Rear Blower Front Control Switch harness connector.
Measure the resistance of the Ground circuit between the Rear Blower Front Control
Switch harness connector and ground.
Is the resistance below 5.0 ohms?
All
Yes
→ Replace the A/C - Heater Control Module in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Repair the Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
580
HEATING & A/C
*REAR BLOWER MOTOR INOPERATIVE - MTC —
Continued