Pin Voltage Tests
NOTE:
Unless specified otherwise, use a DVOM with a minimum input impedance of 10-megohms during testing.
Disconnect instrument cluster connectors "A", "B" and "D". See Figure. Using a DVOM, test each circuit from harness side of appropriate connector under condition as listed. Refer to PIN VOLTAGE TESTS table. If value is not as specified, repair wiring as necessary. Refer to appropriate wiring diagram in WIRING DIAGRAMS .
PIN VOLTAGE TESTS
| Application & DVOM Pins | Condition | Specification | ||||||
|---|---|---|---|---|---|---|---|---|
| Brake Fluid Level Warning Switch | ||||||||
| D8 & Ground | On (Float Down) | Continuity | ||||||
| D8 & Ground | Off (Float Up) | No Continuity | ||||||
| Parking Brake Switch | ||||||||
| D8 & Ground | On | Continuity | ||||||
| D8 & Ground | Off | No Continuity | ||||||
| DOME Fuse (A11 & Ground) | Constant | Battery Voltage | ||||||
| Door Switch | ||||||||
| A15 & Ground | Open (On) | Continuity | ||||||
| A15 & Ground | Closed (Off) | No Continuity | ||||||
| ECT Pattern Select Switch | ||||||||
| C13 & Ground | PWR | Battery Voltage | ||||||
| C13 & Ground | NORM | No Voltage | ||||||
| ECU-B Fuse (D10 & Ground) | Constant | Battery Voltage | ||||||
| Fuel Gauge Sender | ||||||||
| A22 & D15 | Float Position Full | About 3 Ohms | ||||||
| A22 & D15 | Float Position 1/2 | About 30.8 Ohms | ||||||
| A22 & D15 | Float Position Empty | About 110 Ohms | ||||||
| Fuel Warning Light | ||||||||
| D16 & Ground | Over 1/4 | No Continuity | ||||||
| D16 & Ground | Empty | Continuity | ||||||
| Gauge Fuse | ||||||||
| A2 & Ground | Ignition OFF, ACC Or START | No Voltage | ||||||
| A2 & Ground | Ignition ON | Battery Voltage | ||||||
| Generator "L" Terminal | ||||||||
| D12 & Ground | Engine Off | Continuity | ||||||
| D12 & Ground | Engine Running | Battery Voltage | ||||||
| Ground | ||||||||
| A10 & Ground | Constant | Continuity | ||||||
| A23 & Ground | Constant | Continuity | ||||||
| B2 & Ground | Constant | Continuity | ||||||
| HEAD Fuse (SC400) | ||||||||
| C2 & Ground | Headlights On, Dimmer In Flash Or HI | Battery Voltage | ||||||
| C2 & Ground | Headlights On, Dimmer On | No Voltage | ||||||
| Headlight Dimmer Switch | ||||||||
| SC300 | ||||||||
| C3 & Ground | Constant | Battery Voltage | ||||||
| C4 & Ground | Constant | Continuity | ||||||
| SC400 | ||||||||
| C3 & Ground | Dimmer In Flash Or HI (SC400) | Battery Voltage | ||||||
| C4 & Ground | Constant | Continuity | ||||||
| Igniter | ||||||||
| A9 & Ground | Engine Running | Voltage Fluctuates | ||||||
| Odometer & Twin Trip Switch | ||||||||
| A14 & A19 | Clock/Temp Switch Free | Continuity | ||||||
| A14 & A19 | Clock/Temp Switch Pushed | No Continuity | ||||||
| Oil Level Switch | ||||||||
| B8 & Ground | Oil Temp Below 131°F (55°C) | Continuity | ||||||
| B8 & Ground | (1) Float Up | Continuity | ||||||
| B8 & Ground | (1) Float Down | No Continuity | ||||||
| Oil Pressure Switch | ||||||||
| D14 & Ground | Engine Off | Continuity | ||||||
| D14 & Ground | Engine Running | No Continuity | ||||||
| Park/Neutral Position Switch | ||||||||
| SC300 | ||||||||
| C6 & Ground | Park | Battery Voltage | ||||||
| C7 & Ground | Reverse | Battery Voltage | ||||||
| C8 & Ground | Neutral | Battery Voltage | ||||||
| C9 & Ground | 3rd | Battery Voltage | ||||||
| C12 & Ground | 2nd | Battery Voltage | ||||||
| D4 & Ground | Low | Battery Voltage | ||||||
| B10 & Ground | Drive | Battery Voltage | ||||||
| SC400 | ||||||||
| C6 & Ground | Park | Battery Voltage | ||||||
| C7 & Ground | Reverse | Battery Voltage | ||||||
| C8 & Ground | Neutral | Battery Voltage | ||||||
| C12 & Ground | 3rd | Voltage | ||||||
| D4 & Ground | 2nd | Battery Voltage | ||||||
| Rheostat Knob (2) | ||||||||
| A3 & Ground | Fully Clockwise | No Voltage | ||||||
| A3 & Ground | Turned | Voltage Varies (5-12 Volts) | ||||||
| Speed Signal | ||||||||
| A13 & A10 | Driveshaft Turning | Below 1 Volt To 4.5-5.5 Volts | ||||||
| A13 & A10 | Driveshaft Stopped | No Voltage | ||||||
| Starter Relay | ||||||||
| A12 & Ground | Ignition OFF, ACC Or ON | No Voltage | ||||||
| A12 & Ground | Ignition In START | Battery Voltage | ||||||
| Windshield Washer Level Warning Switch | ||||||||
| D5 & Ground | On (Float Down) | Continuity | ||||||
| D5 & Ground | Off (Float Up) | No Continuity | ||||||
|
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