Toyota 2VZ-FE Manual page 298

INSPECTION PROCEDURE
Check voltage between terminals VC and E2 of air flow meter
connector.
Check voltage between terminals VS and E2 of air flow meter
connector.
Check voltage between terminals VS and E2 of ECU connector.
Replace ECU.*
ENGINE TROUBLESHOOTING – Circuit Inspection
(1) Carefully remove water–proofing rubber cover
of air flow meter connector.
(2) Turn ignition switch ON.
Measure voltage between terminals Vc and E
flow meter connector.
Voltage: 5V
Go to step [ 4 ].
(1) Turn ignition switch LOCK.
(2) Remove the air cleaner case.
(3) Turn ignition switch ON.
Check change in voltage between terminals Vs and
E of air flow meter connector while slowly pushing
2
air flow meter measuring plate from closed to open
position with a screwdriver or similar object.
Voltage changes smoothly from about 5V to about
0V; i.e., does not suddenly jump up to 5V or down to
0V.
Go to step [ 7 ].
Check change in voltage between terminals Vs and
E of ECU connector while slowly pushing air flow
2
meter measuring plate from closed to open position
with a screwdriver or similar object.
Voltage changes smoothly from about 5V (when
closed) to about 0V (when open); i.e., does not
suddenly jump up to 5V or down to 0V.
Check for open circuit between ECU and air
flow meter.
* When diag. code 31 or 32 is not displayed, proceed
to next circuit inspection shown on matrix chart
(See page TR–23).
TR–61
of air
2