P0135
E1: CHECK THE VOLTAGE AND SIGNAL GROUND SUPPLY TO THE OXYGEN SENSOR
1. Switch the ignition switch to the OFF position.
2. Raise and support the vehicle. Service and Repair
3. Disconnect the right hand oxygen sensor electrical connector PI6.
4. Switch the ignition switch to the RUN position.
5. Measure the voltage between the right hand oxygen sensor electrical connector PI6 pin 1, and pin 3.
Is the voltage greater than 10.5 volts?
Yes
Go to E3
No
Go to E2
E2: CHECK THE OXYGEN SENSOR VOLTAGE SUPPLY CIRCUIT
1. Measure the voltage between the right hand oxygen sensor electrical connector PI6 pin 1, (GY) and ground.
Is the voltage greater than 10.5 volts?
Yes
REPAIR the circuit between the right hand oxygen sensor electrical connector PI6 pin 2, (N) and the powertrain electrical connector PI1 pin 7, (N). CLEAR DTC. TEST the system for normal operation.
No
REPAIR the circuit between the right hand oxygen sensor electrical connector PI6 pin 1, (GY) and the spliced joint PIS7. CLEAR DTC. TEST the system for normal operation.
E3: CHECK THE OXYGEN SENSOR HEATER CONTINUITY
1. Switch the ignition switch to the OFF position.
2. Measure the resistance between the oxygen sensor electrical connector PI6 pin 1, and pin 2.
Is the resistance between 3 and 10 ohms?
Yes
Go to E4
No
INSTALL a new oxygen sensor. CLEAR DTC. TEST the system for normal operation.
E4: CHECK THE OXYGEN SENSOR FOR FAILURE
1. Connect the oxygen sensor electrical connector PI6.
2. RUN the engine until the oxygen sensor has warmed up and maintain a speed of approximately 2500 rpm
3. Disconnect the oxygen sensor electrical connector.
4. Measure the voltage between the oxygen sensor electrical connector PI6 pin 3, and pin 4.
Is the voltage between 100mV and 1.0 Volt?
Yes
Go to E5
No
INSTALL a new oxygen sensor. CLEAR DTC. TEST the system for normal operation.
E5: CHECK THE OXYGEN SENSOR FOR FAILURE
1. Connect the oxygen sensor electrical connector PI6.
2. REDUCE the engine speed to idle.
3. Disconnect the oxygen sensor electrical connector PI6.
4. Measure the voltage between the oxygen sensor electrical connector PI6 pin 3, and pin 4.
Has the voltage dropped to less than 400mV?
Yes
Go to E6
No
INSTALL a new oxygen sensor. CLEAR DTC. TEST the system for normal operation.
E6: CHECK THE OXYGEN SENSOR FOR FAILURE
1. Connect the oxygen sensor electrical connector PI6.
2. INCREASE the engine speed to approximately 2500 rpm.
3. Disconnect the oxygen sensor electrical connector PI6.
Has the voltage increased to between 100 mV to 1.0 Volt?
Yes
Go to E7
No
INSTALL a new oxygen sensor. CLEAR DTC. TEST the system for normal operation.
E7: CHECK THE HEATED OXYGEN SENSOR FOR SHORT TO GROUND
1. Switch the ignition switch to the OFF position.
2. Disconnect the oxygen sensor electrical connector PI6.
3. Measure the resistance between the oxygen sensor electrical connector PI6 pin 1, (GY) and the oxygen sensor body, and between the oxygen sensor electrical connector PI6 pin 3, (N) and the oxygen sensor body.
Is the resistance greater than 10 M ohms?
Yes
Go to E8
No
INSTALL a new oxygen sensor. CLEAR DTC. TEST the system for normal operation.
E8: CHECK THE OXYGEN SENSOR SIGNAL GROUND CIRCUIT FOR OPEN
1. Measure the resistance between the oxygen sensor electrical connector PI6 pin 3, (N) and ground.
Is the resistance greater than 10,000 ohms?
Yes
REPAIR the circuit between the oxygen sensor electrical connector PI6 pin 3, (N) and the spliced joint PIS6. CLEAR DTC. TEST the system for normal operation.
No
Go to E9
E9: CHECK THE OXYGEN SENSOR INPUT CIRCUIT FOR OPEN
1. Remove the powertrain control module (PCM).
2. Measure the resistance between the oxygen sensor electrical connector PI6 pin 4, (W) and the powertrain control module electrical connector PI1 pin 45, (W).
Is the resistance greater than 10,000 ohms?
Yes
REPAIR the circuit between the oxygen sensor electrical connector PI6 pin 4, (W) and the powertrain control module electrical connector PI1 pin 45, (W). INSTALL the powertrain control module (PCM). CLEAR DTC. TEST the system for normal operation.
No
Go to E10
E10: CHECK THE OXYGEN SENSOR CIRCUIT FOR SHORT TO GROUND
1. Measure the resistance between the oxygen sensor electrical connector PI6 pin 4, (W) and ground.
Is the resistance less than 10,000 ohms?
Yes
REPAIR the signal ground circuit between the oxygen sensor electrical connector PI6 pin 4, ("A") and the powertrain control module electrical connector PI1 pin 45, (W). INSTALL the powertrain control module (PCM). CLEAR DTC. TEST the system for normal operation.
No
Go to E11
E11: CHECK THE OXYGEN SENSOR HEATER CIRCUIT FOR OPEN
1. Measure the resistance between the oxygen sensor electrical connector PI6 pin 2, (N)and the powertrain control module electrical connector PI1 pin 7, (N).
Is the resistance greater than 10,000 ohms?
Yes
REPAIR the circuit between the oxygen sensor electrical connector PI6 pin 2, (N) and the powertrain control module electrical connector PI1 pin 7, (N). INSTALL the powertrain control module (PCM). CLEAR DTC. TEST the system for normal operation.
No
Go to E12
E12: CHECK THE OXYGEN SENSOR HEATER CIRCUIT FOR SHORT TO GROUND
1. Measure the resistance between the oxygen sensor electrical connector PI6 pin 2, (N) and ground.
Is the resistance less than 10,000 ohms?
Yes
REPAIR the output circuit between the oxygen sensor electrical connector PI6 pin 2, (N) and the powertrain control module electrical connector PI1 pin 7, (N). INSTALL the powertrain control module (PCM). CLEAR DTC. TEST the system for normal operation.
No
Go to E13
E13: CHECK THE OXYGEN SENSOR SIGNAL GROUND CIRCUIT FOR SHORT TO GROUND
1. Disconnect both heated exhaust gas oxygen (HEGO) sensor electrical connectors PI6, PI7.
2. Disconnect the engine oil temperature sensor electrical connector PI12.
3. Disconnect the engine fuel temperature sensor electrical connector IL9.
4. Disconnect the cylinder head temperature sensor electrical connector PI13.
5. Disconnect both camshaft position sensor electrical connectors PI10, PI11.
6. Disconnect the injection pressure sensor electrical connector IL2.
7. Disconnect the throttle position sensor electrical connector PI16.
8. Measure the resistance between the oxygen sensor electrical connector PI6 pin 3, (N) and ground.
Is the resistance less than 10,000 ohms?
Yes
REPAIR the signal ground circuit between the oxygen sensor electrical connector PI6 pin 3, (N) and the spliced joint PIS6. INSTALL the powertrain control module (PCM). CLEAR DTC. TEST the system for normal operation.
No
INSTALL a new powertrain control module (PCM). CLEAR DTC. TEST the system for normal operation.