Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA19904RUNNER 2D UTILITY, 3.0 V, STANDARDREPAIR AND DIAGNOSISBODY & FRAMEPOWER WINDOWSCOMPONENT TESTINGINSPECT DOOR LOCK CONTROL RELAY (RELAY CIRCUIT)
1990 Toyota 4Runner 2D Utility, 3.0 V, Standard
Inspect Door Lock Control Relay (Relay Circuit)
1990 Toyota 4Runner 2D Utility, 3.0 V, StandardSECTION Inspect Door Lock Control Relay (Relay Circuit)
Disconnect the connector from the relay and inspect the connector on the wire harness side as shown in the DOOR LOCK CONTROL RELAY CIRCUIT table. If circuit is as specified, inspect the door lock signal and key-off power window signal.
DOOR LOCK CONTROL RELAY CIRCUIT (1)
| Check Item | Tester Connection | Application | Condition | Voltage or Continuity | ||
|---|---|---|---|---|---|---|
| Continuity | 3-Ground | Door lock control switch or door lock key & unlock switch position | Lock | No Continuity | ||
| Continuity | 3-Ground | Door lock control switch or door lock key & unlock switch position | Unlock | Continuity | ||
| Continuity | 4-Ground | Door lock control switch or door lock key & unlock switch position | Unlock | No Continuity | ||
| Continuity | 4-Ground | Door lock control switch or door lock key & unlock switch position | Lock | Continuity | ||
| Continuity | 7-Ground | Passenger's door courtesy switch position | Off (Door Closed) | No Continuity | ||
| Continuity | 7-Ground | Passenger's door courtesy switch position | On (Door Opened) | Continuity | ||
| Continuity | 9-Ground | Driver's door lock switch position | Unlock | Continuity | ||
| Continuity | 9-Ground | Driver's door lock switch position | Lock | No Continuity | ||
| Continuity | 10-Ground | Constant | Constant | Continuity | ||
| Continuity | 11-Ground | Passenger's door lock switch position | Unlock | Continuity | ||
| Continuity | 11-Ground | Passenger's door lock switch position | Lock | No Continuity | ||
| Continuity | 13-Ground | Driver's door courtesy switch position | Off (Door Closed) | No Continuity | ||
| Continuity | 13-Ground | Driver's door courtesy switch position | On (Door Opened) | Continuity | ||
| Voltage | 2-Ground | Constant | Constant | Battery Voltage | ||
| Voltage | 8-Ground | Ignition switch position | Lock or ACC | No Voltage | ||
| Voltage | 8-Ground | Ignition switch position | On | Battery Voltage | ||
| Voltage | 12-Ground | Key unlock warning switch position | Off (Ignition Key removed) | No Voltage | ||
| Voltage | 12-Ground | Key unlock warning switch position | On (Ignition Key set) | Battery Voltage | ||
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RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.