C-25, O2 Sensor Circuit
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C-25, O2 Sensor Circuit |
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Test |
Work Order Description |
Nominal Value |
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T01 |
Check: Short to Voltage/Ground/Interruption of Signal Circuit |
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• 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
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350 ... 550 mV |
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Yes: T02 |
No: T05 |
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T02 |
Check: Component |
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• 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
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50 ... 950 mV |
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Yes: T03 |
No: E01 |
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T03 |
Check: Component |
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• 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
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greater than 700 mV |
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Yes: T04 |
No: E01 |
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T04 |
Check: Component |
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• 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
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Test okay? |
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Yes: E01 |
No: E02 |
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T05 |
Check: Short to Voltage/Ground/Interruption of Signal Circuit |
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• 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
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greater than 550 mV |
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Yes: E03 |
No: E04 |
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C-25, O2 Sensor Circuit |
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Result |
Cause Of Fault |
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E01 |
• Defective component:
P33 Sensor - Oxygen, Exhaust |
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E02 |
• Repair the concerned circuit/component. |
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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 |
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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 |
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