2008-2009 Suzuki 750 King Quad Service Manual, Page 117Get this manual

2008-2009 Suzuki 750 King Quad Service Manual, Page 117

1A-47 Engine General Information and Diagnosis: DTC "C20" (P1752): Diff-lock Relay Circuit Malfunction Detected Condition
Ignition fuse OY Ignition switch Transfer selecting switch WBl Br Diff-lock motor Main fuse B831G21104014 Possible Cause
Diff-lock relay circuit open or short Diff-lock relay malfunction ECM malfunction Diff-lock relay I831G1110048-02 ECM coupler
(Harness side) I831G1110019-01 Troubleshooting! CAUTION When using the multi-circuit tester, do not strongly touch the terminal