HAIMA 7 - Troubleshooting Procedure

Troubleshotting
U-23
Step Inspection Action
4
Inspect heat mode
l Does air blow out in heat mode?
Yes Operation is normal. Recheck
malfunction symptoms.
No Go to next step.
5
Inspect air ports
l Are any air ports clogged?
Yes Remove obstruction, go to step 7.
No Go to next step.
6
Verify that heater duct is installed.
l Are rear heater ducts 4 and 5 properly
installed?
Yes Inspect the rear heating ducts 4 and 5 for
clogging, deformation or air leakage, go
to next step.
No Install the rear cooling ducts 4 and 5 in
the proper position, go to next step.
7
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.
Vii. Airflow of rear air port does not change.
7
Airflow of rear air port does not change.
Malfunction
symptom
Malfunction in rear blower system.
Possible causes
Malfunction in rear climate control unit fan switch, rear main fan switch or related
wiring harness. Step 3
l Malfunction in rear main fan switch or related wiring harness. Step 5
l Malfunction in rear blower resistor, rear blower relay or related wiring harness.
Step 6
l Malfunction in rear a/c unit. Step 7
Troubleshooting procedure
Step Inspection Action
1
Verify whether malfunction is in rear fan
switch or rear main fan switch system.
l Does air blow out from the rear air port
with rear fan switch of rear climate control
unit turned on?
Yes Go to step 4
No Go to next step.
2
Verify that the rear main fan switch is on
rear position.
l Is rear main fan switch on rear position?
Yes Go to next step.
No Set the main fan switch to rear position,
then repeat from step 1.