Maintenance manual for sunray hfc4da1-2c china-IV diesel engines
142
7.
DTC P0202 The 2
nd
cylinder fuel injector circuit is open.
P0264 The low end of the 2
nd
fuel injector is short to the high end.
P0265 The low end of the 2
nd
fuel injector is short to the high level.
P0266 Other errors of the 2
nd
cylinder fuel injector
P1202 The forward error correction of the 2
nd
fuel injector is too large.
P1203 The reverse error correction of the 2
nd
fuel injector is too large.
P120E The dynamic forward error correction of the 2
nd
fuel injector is too large.
P120F The dynamic reverse error correction of the 2
nd
fuel injector is too large.
P1236 Other errors of the 2
nd
cylinder fuel injector
P1237 Other errors of the 2
nd
cylinder fuel injector
P1238 Other errors of the 2
nd
cylinder fuel injector
Fault Description: The ECU controls the switching-on circuit of fuel injector directly. The ECU controls the time for
switching on each fuel injector via adopting a device named “Driver” to supply PWM current to each fuel injector
control circuit. The driver owns a feedback circuit, which is monitored by ECU to verify if the control circuit is open
or short. If any failure in the fuel injector control circuit is detected by ECU, the fuel injector control circuit DTC shall
be generated.
Diagnosis Hint:
For the failure in wire connector shall trigger the setting of DTC, be sure to check the connectors relevant to this
diagnostic procedure for short circuit of terminal or poor contact of wire, prior to replacement of any component.
Observe the state parameter of relevant fuel injector on the diagnostic tool while shaking the wire and connector
relevant to the test. If any intermittent failure is existed in the tested wire or connector, the relevant failure shall be
displayed on the diagnostic tool.
Performing compression test is helpful for locating the intermittent failure.
Terminal ECU
A02 2
nd
fuel injector “High”
A31 2
nd
fuel injector “Low”
2
nd
cylinder fuel injector “High”
2
nd
cylinder fuel injector “Low”
2
nd
cylinder
To Next Page
Loading...