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Home >> Mazda >> 2000 >> MPV DX V6-2.5L DOHC >> Repair and Diagnosis >> Powertrain Management >> Fuel Delivery and Air Induction >> Main Relay (Computer/Fuel System) >> Testing and Inspection >> Component Inspection
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Component Inspection

NOTE: Perform the following test only when directed.

Continuity Inspection
1. Disconnect the negative battery cable.




2. Remove the main relay.




3. Inspect for continuity between main relay terminals using an ohmmeter.
- If not as specified, replace the main relay.
- If the main relay is okay, but PCM terminal 71 or 97 voltage are Out of specification, perform the "Circuit Open/Short Inspection".

Circuit Open/Short Inspection
1. Remove the PCM.




2. Connect the SST (104 Pin Breakout Box) with the PCM disconnected.
3. Tighten the connector attaching bolt.

Tightening torque
7.9 - 10.7 N.m {80 - 110 kgf.cm, 69.5 - 95.4 in.lbf}

4. Inspect the following wiring harness for open (Continuity check).

Open circuit




- If there is no continuity, the circuit is open. Repair or replace the harness.
- Main relay terminal A (harness-side) and battery positive terminal (IG ON)
- Main relay terminal C (harness-side) and battery positive terminal.
- Main relay terminal B (harness-side) and battery negative terminal.

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