Code No. 42 (Solenoid Valve — Waste Gate) - Mazda 626 MX-6 Workshop Manual

Code No. 34 (Solenoid valve—Idle speed control valve (ISC))
Code No. 42 (Solenoid valve—Waste gate)
Are there poor connections in solenoid valve circuit?
Is there continuity of solenoid valve?
Is there battery voltage of RB wire of solenoid valve
connector?
,
Is there continuity between solenoid valve and en­
gine control unit?
Solenoid valve
B (BrY wire)
YES
YES
NO
YES
YES
Control unit
1C
YES PC: • Short circuit in wiring harness
TROUBLESHOOTING WITH SST 4 B
PC: • Short circuit in wiring harness
• Engine control unit malfunction
Repair or replace connector
NO
Repair solenoid valve
NO
PC: Open circuit in wiring harness from RB wire to
main relay (for engine control unit)
NO
PC: Open circuit in wiring harness from solenoid
valve to engine control unit
• Engine control unit malfunction
86U04A-032
86U04B-022
4B-31