Dtc P0481: Fan 2 Control Circuit - Suzuki GRAND VITARA 2005 Service Manual

DTC P0481: Fan 2 Control Circuit

NOTE
• Conditions for applying fault finding procedures to stored faults:
The fault is declared present after the engine is started.
• "Use service wire for all operations on the ECM connectors.
Wiring Diagram
For wiring circuit and connector number, refer to "A-5 Engine and A/C Control System Circuit Diagram (DSL): in
Section 9A".
Detecting Condition
Displaying on SUZUKI scan tool
CO.0
CO.1
Troubleshooting for CO.0: Open circuit or short circuit to vehicle body ground
Check the condition of the radiator fan relay No.2 (High) and radiator fan relay No.3 (High).
Check the ECM connections.
Repair if necessary.
Check the radiator fan relay No.2 (High) and radiator fan relay No.3 (High) mounting connections.
If these checks are correct,
Check the continuity and insulation from vehicle body ground of the following connections:
• Between "E30-5" wire of radiator fan relay No.2 (High) mounting connector and "C85-18" terminal of ECM
connector
• Between "E30-3" wire of radiator fan relay No.2 (High) mounting connector and "E33-6" wire of main relay
connector
• Between "E31-5" wire of radiator fan relay No.3 (High) mounting connector and "C85-18" terminal of ECM
connector
• Between "E31-3" wire of radiator fan relay No.3 (High) mounting connector and "E33-6" wire of main relay
connector
Repair if necessary.
If the fault is still present, substitute a known-good ECM and recheck.
Troubleshooting for CC.1: Short circuit to +12 V
Check the condition of the radiator fan relay No.2 (High) and radiator fan relay No.3 (High).
Check the ECM connections.
Repair if necessary.
Check the radiator fan relay No.2 (High) and radiator fan relay No.3 (High) mounting connections.
Check the continuity and insulation from +12 V of the following connection:
• Between "E30-5" wire of radiator fan relay No.2 (High) mounting connector and "C85-18" terminal of ECM
connector
• Between "E31-5" wire of radiator fan relay No.3 (High) mounting connector and "C85-18" terminal of ECM
connector
Repair if necessary.
If the fault is still present, substitute a known-good ECM and recheck.
Engine General Information and Diagnosis:
Detecting condition
Open circuit or short circuit to vehicle body ground
Short circuit to +12 V
1A-57
S5JB0B1104151