High Altitude Compensation System; Inspect Resistance Of Hac Sensor - Toyota 7M-GE Repair Manual

EFI SYSTEM - Electronic Control System
FI-121
High Altitude Compensation (HAC)
System (7M.mGTE)
HAC Sensor
ECU
Air Flow Meter 7
ov
I -._.. ,,nsor
From Throttle
o HAC
on Sensor
t
Ai+
I
o E2
) El
z
al mnn I
T J.o -- ---- --_
Y
r If
I
/, /
1 INSPECTION OF HAC SENSOR
P
n199
zl
INSPECT RESISTANCE OF HAC SENSOR
(a)
Remove the glove box.
(b)
Using an ohmmeter, measure the resistance between
each terminal.
Terminals
vc - P
VC - E2
P - E2
Resistance
700 - 860 42
2.2 - 3.3 n
2.9 - 4.2 Q
, I
1
If the resistance is not as specified, replace the HAC sen-
sor.