Mazda 626 MX-6 Workshop Manual page 241

Code No. 08 (Air flow meter)
Are there poor connections in air flow meter circuit?
Is there continuity between air flow meter and engine
control unit?
Air flow meter
V (RB wire)
b
Vc (RW wire)
Vs (RB wire)
E (LgY wire)
2
Is resistance of air flow meter OK?
Resistance:
Terminal Fully closed (Q)
E2 « Vs 2 0 -4 00
E2 « Vc
E2 < -» V
b
Is same Code. No. present after performing after­
repair procedure? (Refer to page 4B—11)
Are engine control unit terminal voltages OK?
Check terminal: 2B, 2C, 2E, 3 1
(Refer to page 4B—106 and 107)
YES
NO
Control unit
31
2B
2E
2C
YES
Fully open (fi)
20-1,000
100-400
200-400
YES
YES
YES
TROUBLESHOOTING WITH SST 4 B
Repair or replace connector
NO
PC: Open circuit in wiring harness from air flow
meter to engine control unit
NO
Repair air flow meter
NO
Air flow meter and circuit OK
NO
PC: Short circuit in wiring harness
PC: Engine control unit malfunction
PC: Possible Cause
86U04B-012
4B-21