Troubleshooting
U-18
Troubleshooting procedure
Step Inspection Action
1 Inspect whether malfunction is in a/c system
or defrost system
l Does cold air blow out when switch on
both a/c and fan of front climate control
unit.
Yes Go to next step.
No Go to step 1 of troubleshooting index no.
11.
2
Inspect a/c fuse
l Is a/c fuse normally connected?
Yes Go to next step.
No
l Inspect blown fuse circuit for short
to ground.
— Repair or replace as necessary.
— Install fuse with appropriate rating.
3
Inspect air intake actuator
l Inspect following items of air intake
actuator.
— Is there any grease on the links?
— Is link firmly and properly installed in
position?
— Is link free of obstructions?
l Are all above items normal?
Yes Go to next step.
No Apply grease or install link properly and
firmly, remove obstruction, and then go
to step 15.
*4 Inspect wiring harness between fuse block
and front climate control unit for continuity.
l Turn ignition switch to on position.
l Disconnect climate control unit connector
(12-pin)
l Measure the voltage at climate control unit
connector (air intake module control
12-pin)
— Terminal b (ig2 signal)
l Is voltage close to b+ (positive battery
voltage)?
Yes Go to next step.
No Repair wiring harness between fuse
block and climate control unit, and then
go to step 15.
5
Verify whether malfunction is in air intake
port of blower assembly or elsewhere.
l Does air intake actuator link alternates
repeatedly between fresh and ecir mode?
Yes Go to next step.
No Go to step 8.
6
Inspect air intake actuator
l Inspect air intake actuator (see u-29, air
intake actuator inspection)
l Is it normal?
Yes Go to next step.
No Replace air intake actuator, and then go
to step 15.
7
Inspect wiring harness between front climate
control unit and air intake actuator for short
circuit to ground.
Yes Repair wiring harness between front
climate control unit and air intake
actuator, and then go to step 15.
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