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DTC Check




DTC Check

NOTE:

- To know how to use SUZUKI scan tool in detail, refer to its operator's manual.
- If B1504 is detected when vehicle is not exposed to light (indoor, etc.), check again for DTC with light from incandescent light applied to sunload sensor, referring to Inspection Sunload Sensor Inspection. If B1504 is not detected in this check, sunload sensor is in good condition.

Using SUZUKI Scan Tool

1) Turn OFF ignition switch.
2) Connect SUZUKI scan tool to data link connector (DLC) (1) located on underside of instrument panel.
Special Tool

(A): SUZUKI scan tool (SUZUKI-SDT)





3) Apply light to sunload sensor vertically, holding incandescent light of approximately 100 W about 100 mm (3.94 in.) away from sunload sensor.
4) Turn ON ignition switch.
5) Read DTC according to instructions displayed on SUZUKI scan tool and print it or write it down. Refer to SUZUKI scan tool operator's manual for further details.

If communication between scan tool and HVAC control module is not possible, check if scan tool is communicable by connecting it to HVAC control module in another vehicle. If communication is possible in this case, scan tool is good condition. Then check data link connector and serial data line (circuit) in the vehicle with which communication was not possible.
6) After completing the check, turn ignition switch to OFF position and disconnect SUZUKI scan tool from DLC.

Not Using SUZUKI Scan Tool

Current DTC

1) Apply light to sunload sensor vertically, holding incandescent light of approximately 100 W about 100 mm (3.94 in.) away from sunload sensor.
2) Turn ON ignition switch.
3) Set temperature selector (1) to 25 °C (72 °F).
4) Push "AUTO" switch (2) and "DEF" switch (3) simultaneously.

NOTE:
Step 3) and 4) must be finished within 15 seconds after completed Step 2).

5) Check for DTC (4) displayed on LCD referring to Air Conditioning System DTC Table.






NOTE:
- If DTC is checked within 8 seconds after ignition switch ON, "- - -" (5) is displayed on LCD for a few seconds. This means system check status of HVAC control module.





- If HVAC control module detects DTC, DTC is displayed on LCD for about 3 minutes continuously.
- If no abnormality is detected, "END" (1) is displayed on LCD for about 3 minutes continuously.
- When HVAC control module detects 2 or more DTC, each one is displayed once starting from the one of higher priority order.
- DTC is displayed on LCD by following steps.
a Higher priority DTC displays for 4 seconds.
b No DTC displays for 0.5 second.
c Next priority DTC displays for 4 seconds.
d No DTC displays for 0.5 second.
e As well as above description, all detected DTC is displayed.
f After all detected DTC is displayed, "END" is displayed for 4 seconds.
g DTC display is repeated in same steps for about 3 minutes.





- HVAC control module cancels DTC display at any of following conditions.
- Ignition switch is turned to "OFF" position.
- Both "AUTO" switch and "DEF" switch are pushed simultaneously.

6) After completing above check, turn ignition switch to "OFF" position.

History DTC

7) Turn ON ignition switch.
8) Set temperature selector (1) to 25 °C (72 °F).
9) Push "AUTO" switch (2) and "MODE" selector (3) simultaneously.

NOTE:
Step 2) and 3) must be finished within 15 seconds after completed Step 2).

10) Check for DTC (4) referring to Air Conditioning System DTC Table.

NOTE:
- If history DTC is stored in HVAC control module, "FAN" mark (5) and history DTC are displayed on LCD for about 3 minutes continuously.





- If no history DTC is stored in its memory, "FAN" mark (5) and "END" (1) are displayed on LCD for about 3 minutes continuously.
- When HVAC control module has stored 2 or more history DTC, each one is displayed once starting from the one of higher priority order.
- History DTC is displayed on LCD by following display step.
a Higher priority DTC displays for 4 seconds.
b No DTC displays for 0.5 second.
c Next priority DTC displays for 4 seconds.
d No DTC displays for 0.5 second.
e As well as above description, all detected DTC is displayed.
f After all detected DTC is displayed, "END" (1) is displayed for 4 seconds.
g DTC display is repeated in same step for about 3 minutes.





- HVAC control module cancels history DTC display at any of following conditions.
- Ignition switch is turned to "OFF" position.
- Both "AUTO" switch and "MODE" selector are pushed simultaneously.

11) After completing above check, turn ignition switch to "OFF" position.

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