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Speed Detecting Switch and Amplifier

If mixture ratio control solenoid valve and coolant temperature switch are operating correctly and system still does not function properly, the speed detecting switch and amplifier should be replaced.

Fig 1: Datsun Mixture Ratio System (210 Calif. & 310 Calif. Only)

Courtesy of NISSAN NORTH AMERICA, INC.

Fig 2: Datsun Mixture Ratio Control Solenoid Valve

Courtesy of NISSAN NORTH AMERICA, INC.