Pinpoint Tests DW: Heated Oxygen Sensor (Ho2S): Introduction
WARNING:
To prevent the risk of high-voltage shock, always follow precisely all warnings and service instructions, including instructions to depower the system. The high-voltage system utilizes approximately 300 volts DC, provided through high-voltage cables to its components and modules. The high-voltage cables and wiring are identified by orange harness tape or orange wire covering. All high-voltage components are marked with high-voltage warning labels with a high-voltage symbol. Failure to follow these instructions may result in serious personal injury or death.
This pinpoint test is intended to diagnose the following:
Harness Side
| Circuit | Pin |
|---|---|
| VPWR (Vehicle Power) | 1 |
| HO2S12 (Heated Oxygen Sensor Bank 1, Sensor 2) | 4 |
| HTR12 (Heater Oxygen Sensor Bank 1, Sensor 2) | 2 |
| SIGRTN (Signal Return) | 3 |
Harness Side
| Circuit | Pin |
|---|---|
| HO2S12 (Heated Oxygen Sensor Bank 1, Sensor 2) | E21 |
| HTR12 (Heater Oxygen Sensor Bank 1, Sensor 2) | E35 |
| SIGRTN (Signal Return) | E9 |