Repair Section
2
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108
3 Verify the output waveform of the cylinder rec-
ognition sensor. (Refer to the cylinder recogni-
tion sensor check procedure issued by the
vehicle manufacturer.)
Repair or replace the cylinder recognition sen-
sor and/or the corresponding circuit.
4 Check each injector. (Refer to the injector check
procedure issued by the vehicle manufacturer.)
Repair or replace the injector and/or the corre-
sponding circuit.
5 Verify whether there is a start signal when
cranking the engine by checking the engine
ECU start signal terminal.
Repair the start signal circuit.
6 Check the engine ECU power supply. (Refer to
the engine ECU power supply circuit diagram
issued by the vehicle manufacturer.)
Repair the engine ECU power supply.
7 Check the supply pump and the supply pump
drive circuit. (Refer to the supply pump drive cir-
cuit diagram issued by the vehicle manufac-
turer.)
Repair or replace the supply pump and drive cir-
cuit.
Troubleshooting complete
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