Code 2-4-1 (EGR Flow Too Low)
- Enter test mode No. 3. See TEST MODE NO. 3 under RETRIEVING CODES . Turn ignition on. Press test button on diagnostic unit 3 times for more than one second each. Light should flash as EGR converter is activated. Turn ignition off.
- If EGR converter is not activated, measure resistance between pins No. 6 (Blue wire) and No. 15 (Red/Green wire). Resistance should be about 75-95 ohms. If resistance is not as specified, check wiring and connectors.
- Disconnect EGR converter connector, located next to power steering fluid reservoir. See Fig 1 . Remove wire directly opposite Black/White wire between pin No. 1 and control unit. Reconnect connector.
- Start engine, and run it until it reaches normal operating temperature. Touch loose lead to engine ground. If engine starts to run unevenly, EGR system is operating correctly.