Pinpoint Test A: Electronic Engine Controls Pinpoint Test

WARNING: This page is about a different variant/trim than selected.

A1: PERFORMANCE CHECK OF
NOTE:
- Refer to the Heated Oxygen Sensor location section for information on HO2S locations
- Oxygen sensors will become functional at different times, depending on their location within the exhaust system and the previous drive cycles
1. Refer to the Heated Oxygen Sensor Activation Requirements and Drive Cycle sections for information on HO2S activation requirements and drive cycles
  NOTE: Pre catalyst oxygen sensor - Signal displayed in mA - Signal changes either side of 0mA as fueling changes from lean to rich
2. Using the manufacturer approved diagnostic system check the live data signal Oxygen Sensor Current Bank 1 - sensor 1 (low res)
  NOTE: Mid and post catalyst oxygen sensor - Signal displayed in Volts - Signal changes between 0 and 1 volt as fueling switches from lean to rich
3. Using the manufacturer approved diagnostic system check the live data signal Oxygen Sensor Output Voltage Bank 1 - sensor 3
4. Using the manufacturer approved diagnostic system check the live data signal Oxygen Sensor Output Voltage Bank 1 - sensor 2
5. View the output signals for each HO2S . When active each sensor can be seen reacting to changes in engine speed/load
  Observe the oxygen sensor signal responsible for the DTC . Is the sensor functioning correctly?
  
  Yes: No failure is found. Clear the DTC and perform road test to confirm no fault is present. Refer to the Heated Oxygen Sensor Activation Requirements and Drive Cycle sections for information on HO2S activation requirements and drive cycles
  
  No: Proceed to the next step
A2: ELECTRICAL CHECK OF HEATER POWER SUPPLY
NOTE:
- Refer to the Heated Oxygen Sensor location section for information on HO2S locations
- Complete the following electrical checks ONLY on the sensor(s) with the related DTC set
1. Refer to the electrical circuit diagrams and check the heater power supply
2. Switch ignition OFF
3. Disconnect HO2S (with the related DTC set)
4. Switch ignition ON
5. Pre catalyst oxygen sensor. Measure the voltage between pin 5 and battery ground
6. Mid and post catalyst oxygen sensor. Measure the voltage between pin 1 and battery ground
  Is the measured voltage between 11 and 14 volts?
  
  Yes: Proceed to the next step
  
  No: Check for fuse failure
  
  Check connectors for signs of water ingress, and pins for damage and/or corrosion
  
  Check for vehicle harness failure - Wiring integrity short circuit to ground, short circuit to power, open circuit, high resistance
A3: ELECTRICAL CHECK OF HEATER RESISTANCE
NOTE:
- Refer to the HO2S section for information on HO2S locations
- Complete the following electrical checks ONLY on the sensor(s) with the related DTC set
- Remove multimeter internal resistance value from measurement
1. Refer to the electrical circuit diagrams and check the heater resistance
2. Switch ignition OFF
3. Make sure the HO2S connector is disconnected
4. Pre catalyst oxygen sensor. Measure the resistance of the sensor between pin 5 and pin 6
5. Mid and post catalyst oxygen sensor. Measure the resistance of the sensor between pin 1 and pin 2
  Is the measured resistance between 1 and 15 Ohms?
  
  Yes: Check connectors for signs of water ingress, and pins for damage and/or corrosion
  
  Check for vehicle harness failure - Wiring integrity short circuit to ground, short circuit to power, open circuit, high resistance
  
  No: Install a new HO2S component