C-25, O2 Sensor Circuit
| C-25, O2 Sensor Circuit | ||
|---|---|---|
| Test | Work Order Description | Nominal Value |
| T01 | Check: Short to Voltage/Ground/Interruption of Signal Circuit | |
| Disconnect wiring harness connector from: P33 Sensor - Oxygen, Exhaust Ignition ON Measure voltage between the following terminals: P33 Sensor - Oxygen, Exhaust Wiring Harness Connector (control unit side) Terminal 1 & Ground | 350 ... 550 mV | |
| Yes: T02 | No: T05 | |
| T02 | Check: Component | |
| Engine running at idle speed, operating temperature Measure voltage between the following terminals: P33 Sensor - Oxygen, Exhaust Wiring Harness Connector (component side) Terminal 1 & Ground | 50 ... 950 mV | |
| Yes: T03 | No: E01 | |
| T03 | Check: Component | |
| Measure voltage between the following terminals: P33 Sensor - Oxygen, Exhaust Wiring Harness Connector (component side) Terminal 1 & Ground Accelerator pedal briefly actuated to full load stop | greater than 700 mV | |
| Yes: T04 | No: E01 | |
| T04 | Check: Component | |
| Check the following component for proper operation: Fuel pump pressure and Only X 14 XE, X 16 XE, X 16 XEL : Y7 Injection Valves - Fuel Only X 14 SZ, X 16 SZR : Y32 Injection Valve - Fuel | Test okay? | |
| Yes: E01 | No: E02 | |
| T05 | Check: Short to Voltage/Ground/Interruption of Signal Circuit | |
| Disconnect wiring harness connector from: P33 Sensor - Oxygen, Exhaust Ignition ON Measure voltage between the following terminals: P33 Sensor - Oxygen, Exhaust Wiring Harness Connector (control unit side) Terminal 1 & Ground | greater than 550 mV | |
| Yes: E03 | No: E04 |
| C-25, O2 Sensor Circuit | |
|---|---|
| Result | Cause Of Fault |
| E01 | Defective component: P33 Sensor - Oxygen, Exhaust |
| E02 | Repair the concerned circuit/component. |
| E03 | Short circuit to voltage between: P33 Sensor - Oxygen, Exhaust Wiring Harness Connector (wiring harness side) Terminal 1 & K57 Control Unit - Multec Terminal D9 or Defective component: K57 Control Unit - Multec |
| E04 | Short circuit to ground/interruption of circuit between: P33 Sensor - Oxygen, Exhaust Wiring Harness Connector (wiring harness side) Terminal 1 & K57 Control Unit - Multec Terminal D9 or Defective component: K57 Control Unit - Multec |