TEST
ACTION
APPLICABILITY
3
Replace IPM Fuse #12.
Turn the ignition on.
Operate the blower motor in all speeds.
Start the engine and operate the ATC system in all modes and speeds.
Does the blower motor operate properly without blowing the fuse?
All
Yes
→ Refer to the wiring diagrams located in the service information to
help isolate a possible intermittent short to ground condition.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 4
4
Turn the ignition off.
Disconnect the Rear Blower Motor Power Module C1 harness connector.
Measure the resistance between ground and the Fused Rear Blower Relay Output
circuit.
Is the resistance below 10K ohms?
All
Yes
→ Repair the Fused Rear Blower Relay Output circuit for a short to
ground. Replace IPM Fuse #12.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 5
5
Turn the ignition off.
Replace IPM Fuse #12.
Disconnect the Rear Blower Motor Power Module C1 harness connector.
Disconnect the Rear Blower Motor Power Module C2 harness connector.
Connect a jumper wire between the Fused Rear Blower Relay Output circuit in the
Rear Blower Motor Power Module C1 harness connector and the Power Feed circuit
in the Rear Blower Motor Power Module C2 harness connector.
Connect a jumper wire between the Ground circuit in the Rear Blower Motor Power
Module C1 harness connector and the Ground circuit in the Rear Blower Motor
Power Module C2 harness connector.
Turn the ignition on.
Does the Blower Motor operate at full speed without blowing the fuse?
All
Yes
→ Replace the Rear Blower Motor Power Module in accordance with
the Service Information. Replace IPM Fuse #12.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Blower Motor in accordance with the Service Infor-
mation. Replace IPM Fuse #12.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
6
Ensure IPM Fuse #12 is installed.
Disconnect the Rear Blower Motor Power Module C1 harness connector.
Turn the ignition 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 Fused Rear Blower
Relay Output circuit in the Rear Blower Motor Power Module C1 harness connector.
Does the test light illuminate brightly?
All
Yes
→ Go To 7
No
→ Go To 13
275
AUTOMATIC TEMPERATURE CONTROL
*REAR BLOWER MOTOR INOPERATIVE —
Continued