Test Point 1

TEST POINT 1
Oxygen Sensor Heater 2 and Oxygen Sensor Heater 1 ahead of catalytic converter.

DTC 5, 13

1. Pull off relay (ignition/oxygen sensors) from relay support 2 with the special tool "relay extractor 9235".

Connect ohmmeter to relay base pin 87 and to control module connector pin 30.

Ignition "OFF" (pull off one sensor connector in each case)

Required measured value: 1 - 15 ohms

NOTE: Both sensor heaters are connected in parallel.






2. Pull off the sensor connector and connect voltmeter to pin 1 and ground.

Ignition "ON"

Display: approx. 12 Volts

If there is no display: Check current path according to wiring diagram.