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