The second dissociation channel (CS2+ --> CS+(X(2)Sigma) + S(P-3)) Of CS2+ molecular ions has been investigated by measuring the photofragment CS+ excitation (PHOFEX) spectrum in the wavelength range of 385 - 435 nm, where the CS2+ molecular ions were prepared purely by [3 + 1] multiphoton ionization of the neutral CS2 molecules at 483.2 nm. The CS+ PHOFEX spectrum was assigned essentially to the CS2+ (A(2)Pi(u)) <-- CS2+ (X(2)Pi(g)) transition, such as the S+ PHOFEX spectrum, which has been obtained previously. The product branching ratios (CS+/S+), as measured from the PHOFEX spectra, increase from 0 to slightly larger than I in the wavenumber range of 47200-50400 cm(-1). The adiabatic appearance potential of the CS+ ion was determined to be 5.852 +/- 0.005 eV above the X(2)Pi(g,3/2) (0,0,0) level Of CS2+ from the appearance wavenumber of 47196.2 cm(-1) to produce the CS+ ion. The dissociation mechanism to get to CS+ + S from CS2+ was discussed and preliminarily attributed to (i) CS2+ (X(2)Pi(g)) --> CS2+ (A(2)Pi(g)) through one-photon excitation, (ii) CS2 + (A(2)Pi(u)) --> CS2+ (X-dagger) via internal conversion process due to the vibronic coupling between the A and states, (iii) CS2+ (X-dagger) --> CS2+ (B(2)Sigma(u)(+)) through the second photon excitation, and (iv) CS2+ (B(2)Sigma(u)(+)) --> CS+(X (2)Sigma) + S(P-3), because of the potential curve crossing with the repulsive (4)Sigma(-) state and/or the (2)Sigma(-) state correlated with the second dissociation limit.