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Home >> Isuzu >> 1989 >> Trooper XS, 2.8 R >> Repair and Diagnosis >> Engine Performance >> System >> Tests W/Codes - 4-CYL >> Entering Self-Diagnostics >> Notes

Entering Self-Diagnostics: Notes

CAUTION: DO NOT  enter self-diagnostic system until all basic engine checks (engine, fuel and spark) have been performed. See the BASIC TESTING - EFI article in this section.

Verify "CHECK ENGINE" light circuit is operational. To enter self-diagnostics, install jumper wire between diagnostic leads with ignition on. See Figure .

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