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P1119 Oxygen Sensor Heating 2 Ahead of Catalytic Converter - Below Lower Limit
Check resistance of H025 heating.
1. Remove connector of H02S 1/2 ahead of catalytic converter.
2. Connect ohmmeter on pin side to pins 1 and 2.
Display: 1.8 - 2.5 ohms at 20°C.
3. Connect ohmmeter on pin side to pin 1 and H02S housing.
Display: infinite ohms
Check wiring from DME control module to disconnection point of H025 1/2 for continuity, short to B+ and short to ground.
1. Remove connector of H02S 1 and 2 ahead of catalytic converter.
2. Connect special tool 9616 to wiring harness (DME control module connector). This special harness tool keeps you from shorting the wrong wires on the DME and blowing the DME up. If you don't feel comfortable doing this then please have a shop or dealer do it. Last time I checked DME's were about just over $1000.
3. Connect ohmmeter to special tool 9616, pin 30, and disconnection point of H02S 1/2 ahead of catalytic converter, pin 2.
Display: < 1 ohms
4. Connect ohmmeter at sleeve to connector, pin 2, and ground.
Display: infinite ohms
5. Remove ignition, injection and oxygen sensor heating relay and bridge terminals 30 and 87.
6. Connect voltmeter at sleeve to connector, pin 2, and ground.
Display: 0 (zero) volts
Check output stage of DME control module.
1. Remove connectors to oxygen sensors.
2. Start engine and run at high speed for 3 minutes.
3. Connect voltmeter at sleeve to pin 1 (positive) and pin 2.
Display: battery voltage
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