Main Relay (Computer/Fuel System): Testing and Inspection

PCM POWER RELAY (BATTERY POWER)
^ If the circuit is open, the engine will not start
^ If the circuit is shorted, the EEC PWR fuse (3OA) will burn out.

Relay Pinout:

INSPECTION
1. Measure resistance between pins 85 and 86 of the relay.

Specification: 40-120 ohms.

2. Measure resistance between pin 85 and both pins 30 and 87 of relay.

Specification: greater than 10,000 ohms.

3. Apply battery voltage (B+) and check for continuity between terminals of the relay.

Relay Terminal Continuity:

Specifications

4. If not as specified, replace the PCM power relay.