Diagnostic Aids
The following table illustrates the ECM connector locations:
DTC P2626
| ECM Connector Location | |
|---|---|
| C2 | C1 |
| Front of Vehicle | |
- The front wide band sensors do not toggle or switch like a switching HO2S. The front HO2S signals will be relatively stable for an idling engine.
- Use the J 35616 Connector Test Adapter Kit for any test that requires probing the ECM harness connector or a component harness connector. See Special Tools .
- For an intermittent condition, refer to Intermittent Conditions .
- The following table illustrates the typical voltages for the HO2S circuits.
HO2S Voltages
|
|
|---|---|
| HO2S Circuit | Voltage |
| Heater Control | 4.6-5 V |
| Heater Supply Voltage | B+ |
| Reference Voltage | 2.6-3.1 V |
| Low Reference | 2.2-2.7 V |
| Pump Current | Less than 0.5 V |
| Input Pump Current | Less than 0.5 V |