Speed Sensor Circuit

Check for fluctuation of speedometer while driving at a steady speed. If speedometer fluctuates, speedometer might be faulty or dry. If speedometer does not fluctuate, turn ignition off. Disconnect speed sensor connector.
Check for continuity between body ground and terminal B on Camry analog gauges, terminal A9 on Camry digital gauges, terminal No. 2 on Celica and Corolla FX Hatchback, terminal No. 1 on Corolla Coupe, Sedan, terminal B9 on Cressida analog gauges, terminal A9 on Cressida digital gauges, terminal B5 on MR2, terminal B7 on Pickup and 4Runner, terminal A5 on Tercel Wagon, terminal B1 on Tercel Sedan, terminal No. 5 on Supra and terminal No. 3 on Van. See Fig 1 thru Fig 9 \.

Fig 1: Speed Sensor Connector Terminal Identification (COROLLA)
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Fig 2: Speed Sensor Connector Terminal Identification (CAMRY)
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Fig 3: Speed Sensor Connector Terminal Identification (CELICA)
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Fig 4: Speed Sensor Connector Terminal ID (FX W/Tach and W/O Tach)
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Fig 5: Speed Sensor Connector Term ID (CRESSIDA Analog & Digital)
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Fig 6: Speed Sensor Connector Terminal Identification (MR2 )
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Fig 7: Speed Sensor Connector Terminal Identification (SUPRA )
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Fig 8: Speed Sensor Connector Terminal ID (PICKUP & 4RUNNER)
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Fig 9: Speed Sensor Connector Terminal ID (TERCEL Sedan And Wagon)
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If no continuity is present, check for open between terminal and body ground. If continuity is present, check speed sensor operation. If speed sensor is not operating properly, replace sensor. If sensor is operating properly, disconnect computer connector.
Check for continuity between terminal A on Camry analog gauges, terminal A11 on Camry digital gauges, terminal No. 1 on Celica, terminal B6 on Corolla FX Hatchback and MR2, terminal No. 2 on Corolla Coupe, Sedan and Van, terminal B7 on Cressida analog gauges, terminal A11 on Cressida digital gauges, terminal B4 on MR2, Pickup and 4Runner, terminal A4 on Tercel Wagon, terminal B2 on Tercel Sedan, terminal No. 6 on Supra of connector and terminal No. 7 of computer.
If no continuity is present, check for open between (terminals listed above) of speed sensor and terminal 7 of computer. If continuity is present, replace cruise control computer.