240 L4-2320cc 2.3L SOHC VIN 83 B230FD (1993)
Ignition Power Stage: Testing and Inspection
Power Stage #4 No Power Stage Power
UH. POWER STAGE #4
Power stage #4 No power stage power
Fault Message Conditions:
The fault is recorded if voltage does not exceed 1 V. at the input during the Running Test or if the voltages at Power stage #4, DI #6 and MFI #35 are
different.
Fault causes:
Break in the wiring to power stage terminal 4.
Fault symptoms:
The engine will not start.
If the fault is intermittent the engine will stop or run rough.
UH1
Volvo ST, Test Box
-Disconnect the ST in accordance with QA2.
-Connect the control module.
-Re-install system fuse.
-Continue with Checking the power supply UH2.
UH2
Checking the power supply
-Disconnect the power stage.