{"model":"mk3","model_name":"MK3 Supra","vehicle":"Toyota Supra A70 (1986.5–1992, 7M-GE / 7M-GTE)","document":"Repair Manual","section":"BE","section_name":"Body Electrical System","page":39,"pages_in_section":116,"title":"Speedometer","section_header":"Body Electrical System — Combination Meter","ocr_text":"Speedometer\n\nON-VEHICLE INSPECTION OF SPEEDOMETER\n\n(a) Using a speedometer tester, inspect the speedometer allowable indication error and check the operation of the odometer.\n\nHINT: Tire wear and tire over or under inflation will increase the indication error.\n\nStandard indication (mph) | Allowable range (mph)\n20 | 20 — 23\n40 | 40 — 43.5\n60 | 60 — 64\n80 | 80 — 84.5\n100 | 100 — 105\n\nStandard indication (km/h) | Allowable range (km/h)\n20 | 18 — 23\n40 | 40 — 44\n60 | 60 — 64.5\n80 | 80 — 85\n100 | 100 — 105\n120 | 120 — 125.5\n140 | 140 — 146\n160 | 160 — 167\n\nIf error is excessive, replace the speedometer.\n\n(b) Check the speedometer for pointer vibration and abnormal noises.\n\nHINT: Pointer vibration can be caused by a loose speedometer cable.\n\nTachometer\n\nON-VEHICLE INSPECTION OF TACHOMETER\n\n(a) Connect a tune-up test tachometer, and start the engine.\n\nNOTICE:\n• Reversing the connection of the tachometer will damage the transistors and diodes inside.\n• When removing or installing the tachometer, be careful not to drop or subject it to heavy shocks.\n\n(b) Compare the tester and tachometer indications.\n\nDC 13.5V, 25°C\nStandard indication (rpm) | Allowable range (rpm)\n700 | 610 — 750\n3,000 | 2,800 — 3,200\n5,000 | 4,800 — 5,200\n7,000 | 6,700 — 7,300\n\nIf error is excessive, replace the 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