Suzuki GRAND VITARA 2005 Service Manual page 503

Condition
Heating performance is
poor (for additional heater
system)
Heater Core Removal and Installation
Removal
1) Remove instrument panel referring to "Instrument
Panel Removal and Installation: in Section 9C in
related manual".
2) Remove HVAC unit. Refer to "HVAC Unit Removal
and Installation: in Section 7B".
3) Remove heater core pipe clamp and then, pull out
heater core (1) from HVAC unit.
Installation
1) Install heater core by reversing removal procedure,
noting the following items.
• When installing heater core, be careful not to
damage fins of heater core.
• When installing each part, be careful not to catch
any wiring harness.
2) Fill engine coolant referring to step 13) to 20) of
"Cooling System Refilling: in Section 1F".
3) Enable air bag system referring to "Enabling Air Bag
System: in Section 8B in related manual".
Possible cause
Fuse blown
Additional heater relays faulty
Additional heater assembly faulty
ECM faulty
Wiring or grounding faulty
Repair Instructions
S5JB0B7106010
1
I6JB01710006-01
Heater and Ventilation:
Correction / Reference Item
Check related fuses and check for short circuit
to ground.
Check additional heater relays referring to
"Additional Heater Relay Inspection: ".
Check additional heater assembly referring to
"Additional Heater Assembly On-Vehicle
Inspection: ".
Check ECM.
Repair as necessary.
Additional Heater Relay Inspection
1) Disconnect negative (–) cable at battery.
2) Remove additional heater relay No.1 (1), No.2 (2)
and No.3 (3) from vehicle.
3) Check that there is no continuity between terminal
"c" and "d". If there is continuity, replace relay.
4) Connect battery positive (+) terminal to terminal "b"
of relay and battery negative (–) terminal to terminal
"a" of relay.
Check that there is continuity between terminal "c"
and "d".If there is no continuity, replace relay.
1
2
3
c
a
b
S5JB0B7106024
d
I5JB0B710005-01
7A-4