HAIMA 7 - Page 434

Troubleshooting
U-24
Step Inspection Action
3
Inspect rear fan switch, rear main fan switch
and related wiring harness.
l Inspect following items of system and
electrical parts.
— Rear fan switch of rear climate control unit.
— Rear main fan switch.
— Related wiring harness
l Are all above items normal?
Yes Go to next step.
No Repair or replace malfunction parts, go
to step 8.
4 Verify whether malfunction is in rear a/c unit
fan or elsewhere.
l Does air blow out from the rear air port
with rear main fan switch turned on?
Yes Go to step 7.
No Go to next step.
5
Inspect rear main fan switch and related
wiring harness.
l Inspect system and electrical parts.
— Main fan switch
— Related wiring harness
l Are all above items normal?
Yes Go to next step.
No Repair or replace malfunction parts, go
to step 8.
6 Inspect rear blower resistor, rear blower
relay and related wiring harness
l Inspect system and electrical parts.
— Rear blower resistor
— Rear blower relay
— Related wiring harness
l Are all above items normal?
Yes Go to next step.
No Repair or replace malfunction parts, go
to step 8.
7
Inspect the rear a/c unit fan.
l Inspect following items of rear a/c unit fan.
— Is fan free of interference from rear a/c unit
case?
— Is fan free of obstructions?
l Are all above items normal?
Yes Inspect whether rear a/c unit duct is
clogged, go to step 8.
No Remove obstruction, repair or replace
fan and rear a/c unit case, then go to next
step.
8
Verify whether malfunction symptom occurs
after repair.
l Does air blow out?
Yes Troubleshooting completed. Explain
conditions to customer.
No Recheck malfunction symptoms, and
then repeat from step 1 if malfunction
reoccurs.