Chapter 4 EI system diagnosis Section 4 EI system troubleshooting
4—16
MALFUNCTIO
N CODE
DETECTED ITEM
DETECTED FAILURE CONDITION
CHECK FOR
P0131
O
2
SCircuit
Low Voltage
After engine running,the oxygen sensor signal is in putted in ECU
since then 300sec.
In this case,the sensor voltage should be the following.
30mV≤Sensor out put voltage
Without the above range for 28.1sec.and more,P0131 is indicated.
Oxygen sensor, lead wire / coupler connection.
P0132
High Voltage
After engine running,the oxygen sensor signal is in putted in ECU
since then 300sec.
In this case,the sensor voltage should be the following.
Sensor output voltage ≤1.0V
Without the above range for 29.4sec.and more,P0132 is indicated.
Oxygen sensor, lead wire / coupler connection.
P2195
O
2
S Circuit
Out of Range
When engine is running in PE mode, target AFR ≤ 13.5， and the O2
voltage is lower than 400mv, for more than 180S, P2195 is indicated
Oxygen sensor, lead wire / coupler connection.
P014C
Performance
Engine is running in fuel close loop control mode, and the engine
temperature > 50 . In every 90S of test cycle, if the average value of ℃
calculated Rich to Lean time is bigger than 600ms, P014C is indicated.
Oxygen sensor, lead wire / coupler connection.
P014D
Performance
Engine is running in fuel close loop control mode, and the engine
temperature > 50 . In every 90S of test cycle, if the average value of ℃
calculated Lean to Rich time is bigger than 600ms, P014D is indicated.
Oxygen sensor, lead wire / coupler connection.
P0261
Fuel Injector Circuit
Open/Short Low
After engine running, if fuel injector signal open or is happened the
ground short fault for 1second by 5 times in10 times test cycle,the code
P0261 is indicated.
Injector,wiring/coupler connection,power supply to the injector.
P0262
Fuel Injector Circuit Short
High
After engine running, if fuel injector signal is happened the high short
fault for 1second by 5 times in10 times test cycle, the code P0262 is
indicated.
Injector,wiring/coupler connection,power supply to the injector.
P0231
Fuel pump
Circuit
LowVoltage
or Open
After engine running, if fuel pump relay signal open or is
happened the ground short fault for 1 second by 10 times in 20
times test cycle,the codeP0231is indicated.
Fuel pump relay, connecting lead wire, power source to fuel pump
relay, fuel injector.
P0232
High Voltage
After engine running,if fuel pump relay signal is happened the high
short fault for 1 second by 10 times in 20 times test cycle, the code
P0232 is indicated.
Fuel pump relay, connecting lead wire, power source to fuel pump
relay, fuel injector.
To Next Page
Loading...
