Turbo Meter Drive Circuit (Celica & MR2)
Remove turbo pressure sensor connector. Remove instrument cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION. Inspect wire harness connectors for damage or poor connection. Using a DVOM, check wiring harness connector terminals for correct values. See Fig 1. If values are not as specified, replace meter drive circuit. See TURBO METER DRIVE CIRCUIT SPECIFICATIONS (CELICA & MR2) table.
TURBO METER DRIVE CIRCUIT SPECIFICATIONS (CELICA & MR2)
| Test Terminal | Ignition | Specified Value | |||
|---|---|---|---|---|---|
| Resistance Check | |||||
| A - B | Off | Continuity | |||
| C -2 (1) | Off | Continuity | |||
| D - Ground | Off | Continuity | |||
| 1 (1) - Ground | Off | Continuity | |||
| Voltage Check | |||||
| E - Ground | Off | Zero Volts | |||
| E - Ground | On | Battery Voltage | |||
| 3 (1) - Ground | Off | Zero Volts | |||
| 3 (1) - Ground | On | Battery Voltage | |||
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