BELOW LOWER LIMIT
Test results
1
CHECK ON CONNECTIONS AT TURBOCHARGING SENSOR AND AT ENGINE MANAGEMENT CONTROL UNIT
All OK
Problems encountered
Operation
Check for the presence of loose connections at the turbocharging sensor and at the engine management control unit
Go to Step 2
Presence of loose connections
Restore the correct connections.
2
CHECK ON WIRING INSULATION AND INTERRUPTION
Check that the wiring is correctly insulated and check for breaks.
Go to Step 3
1. Wiring insulation not correct
2. Breaks in the wiring.
1. Restore correct insulation
2. Restore the correct wiring.
3
TURBOCHARGING AIR BY-PASS SOLENOID OPERATION CHECK
Check that the turbocharging air by-pass solenoid is working properly
See Test 1064BH CHECK ON OPERATION OF SUPERCHARGING AIR BY-PASS SOLENOID VALVE (SHUT OFF)
Go to Step 4
Solenoid not working properly.
Replace the by-pass solenoid
Op. 1048B58 TURBOCHARGER AIR BY-PASS VALVE - R.R.
4
AIR SEEPAGE CHECK
Check for the presence of air seepage in the pipe connecting the turbocharger to the throttle body.
End of diagnosis
Presence of air seepage
Restore the correct pipe seal.
ABOVE LOWER LIMIT