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Test results |
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Heat exchanger |
Check that the heat exchanger is not clogged |
Go to Step 2 |
Heat exchanger dirty/blocked by foreign bodies |
Clean/restore the intercooler |
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Heat exchanger |
Check that the heat exchanger is not damaged |
Go to Step 3 |
Heat exchanger damaged |
Replace the heat exchanger Op. 1048B50 SUPERCHARGING AIR/AIR HEAT EXCHANGER - R.R. |
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Vacuum pipe on EGR solenoid valve |
Check that the vacuum pipe is correctly connected to the EGR cooler bypass solenoid |
Go to Step 4 |
Vacuum pipe on EGR cooler bypass solenoid valve disconnected |
Fit the pipe onto the solenoid valve |
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Vacuum pipe on EGR solenoid valve |
Check that the vacuum pipe on EGR cooler bypass solenoid valve is not damaged |
Go to Step 5 |
Vacuum pipe on EGR cooler bypass solenoid valve damaged |
Replace the vacuum pipe on EGR cooler bypass solenoid valve |
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EGR cooler bypass solenoid valve wiring |
Check the continuity of the wiring between the EGR cooler bypass solenoid valve and the engine control unit |
Go to Step 6 |
Incorrect wiring continuity |
Restore the correct connections |
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EGR cooler bypass solenoid valve wiring |
Check the continuity/insulation of the wiring between the EGR cooler bypass solenoid and the engine control unit |
Go to Step 7 |
Wiring insulation not correct |
Restore the correct connections |
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EGR cooler bypass solenoid valve |
Check that the EGR cooler bypass solenoid valve is working correctly |
End of diagnosis |
EGR cooler bypass solenoid valve not working correctly |
Replace the EGR cooler bypass solenoid valve Op. 1080C80 EXHAUST GAS/WATER HEAT EXCHANGER FOR EGR SYSTEM - R.R |