Suzuki Swift Sport 2004 Service & Repair Manual page 1006

7B-58 Air Conditioning System: Automatic Type
DTC Troubleshooting
NOTE
• When DTC B1502, B1503 and B1514 are indicated together, it is possible that "ORN" wire circuit
open.
• When DTC B1514 is indicated together, it is possible that "WHT" wire circuit open.
Step
1 DTC check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ON ignition switch and check DTC.
Is there DTC B1511?
2 Visual check
1) Check if there is any obstruction in operating range of
actuator linkage and if actuator linkage operates
smoothly.
Is it in good condition?
3 Wire harness check
1) Disconnect connector from temperature control actuator
with ignition switch turned OFF.
2) Check for proper connection to temperature control
actuator connector at "GRY/BLU" and "GRY/RED" wire
terminals.
3) If OK, measure voltage between "GRY/BLU" wire
terminal of temperature control actuator connector and
vehicle body ground with ignition switch turned ON when
temperature selector is operation to COOL direction.
Is voltage 10 – 14 V?
4 Wire harness check
1) Disconnect connector from HVAC control module with
ignition switch turned OFF.
2) Check for proper connection to HVAC control module
connector at "G51-3" and "G51-4" terminals.
3) If OK, measure resistance between "GRY/BLU" wire
terminal of temperature control actuator connector and
"G51-3" terminal of HVAC control module connector.
Is resistance below 5
5 Wire harness check
1) Measure resistance between "GRY/BLU" wire terminal
of temperature control actuator connector and vehicle
body ground.
Is resistance infinity?
6 Wire harness check
1) Measure voltage between "GRY/BLU" wire terminal of
temperature control actuator connector and vehicle body
ground with ignition switch turned ON.
Is voltage 0 V?
Action
Ω
?
Yes
Go to applicable DTC
diag. flow.
Go to Step 3.
Go to Step 7.
Go to Step 5.
Go to Step 6.
Go to Step 7.
No
Go to Step 2.
Obstruction in operating
range of actuator
linkage, actuator linkage
faulty and/or internal
fault of HVAC unit.
Go to Step 4.
"GRY/BLU" wire open or
high resistance circuit.
"GRY/BLU" wire shorted
to ground circuit.
"GRY/BLU" wire shorted
to other circuit.