Dtc B1553: Can Communication Circuit Malfunction - Suzuki GRAND VITARA JB416 Service Manual

5. To radiator fan relay No.3
6. Ignition switch
7. Small lamp relay
8. To BCM
9. Evaporator temperature sensor
10. Inside air temperature sensor
11. Temperature control actuator
12. Air intake control actuator
13. Air flow control actuator
14. Sunload sensor
15. Data link connector
16. HVAC control module

DTC B1553: CAN Communication Circuit Malfunction

DTC Detecting Condition and Trouble Area
HVAC control module receives error code from BCM continuously.
DTC Troubleshooting
Step
1 DTC check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Check ECM and BCM for DTC.
Is there DTC(s)?
21. A/C compressor
22. Blower motor
23. Blower motor selector
24. Radiator fan relay No.1
25. Radiator fan No.1
26. Radiator fan relay No.2
27. Radiator fan relay No.3
28. Radiator fan No.2
29. ECM
30. Outside temperature sensor
31. ABS/ESP® control module
32. BCM
Diagnostic Information and Procedures
DTC detecting condition
Action
Air Conditioning System:
37. Indicator lamp, switch, selector
38. To wheel speed sensor
39. To information display
40. To ECM
41. To BCM
42. To compressor relay
43. To rear defogger relay
44. To combination switch
45. AUTO-ON head light system vehicle
*: M16 engine model
Trouble area
• CAN communication circuit
• Steering angle sensor (if equipped)
• Keyless start control module (if
equipped)
• 4WD control module (if equipped)
• TCM (if equipped)
• Combination meter
• ABS/ESP® control module
• BCM
• HVAC control module
• ECM
Yes
Go to applicable DTC
diag. flow.
7B-3
S5JB0E7204026
No
Substitute a known-
good HVAC control
module and recheck.