HAIMA 7 - Troubleshooting Procedure

Troubleshotting
U-21
Troubleshooting procedure
Step Inspection Action
1 Inspect coolant temperature.
l Is coolant warmed up sufficiently?
Yes Go to next step.
No Preheat engine to normal operation
temperature, go to step 8.
2
Inspect air mix system of front a/c unit.
l Inspect following items of front a/c unit air
mix links, air mix rocker, shaft and cable
clamp.
— Is there grease on links and rockers?
— Are links, rockers, and rods firmly installed
in proper positions?
— Is cable clamp free of deformation?
l Are all above items normal?
Yes Go to next step.
No Apply grease or install links, rocker, and
shaft firmly in their proper positions,
repair or replace cable clamp, go to step
8.
3
Verify that air mix cable from a/c unit is
installed in proper positions firmly and
correctly.
l Is air mix cable firmly installed in the
correct position in relation to a/c unit?
Yes Go to next step.
No Adjust air mix cable or install it in
correct position, go to step 8.
*4
Inspect front climate control unit
l Inspect following items of front climate
control unit.
— Does bevel gear set properly engage?
— Is air mix cable position correct in relation
to bevel gear?
— Is cable clamp free of deformation?
l Are all above items normal?
Yes Go to next step.
No Properly engage bevel gear or install air
mix cable in correct position, repair or
replace cable clamp, go to step 8.
5
Inspect front a/c unit
l Is there any foreign material or obstruction
in air mix control valve of a/c unit?
Yes Remove obstruction, go to step 8
No Go to next step.
6
Inspect air mix control valves of a/c unit.
l Inspect following items of air mix control
valves of a/c unit.
— Are air mix control valves free of cracks or
damage?
— Are all air mix control valves firmly and
properly installed?
l Are all above items normal?
Yes Go to next step.
No Replace the failed control valve or install
new control valve firmly in proper
position, go to step 8.