-8 EFI SYSTEM -.- Inspection Precautions
IF VEHICLE IS EQUIPPED WITH MOBILE
RADIO SYSTEM (HAM, CB, ETC)
The ECU has been designed so that it will not be affected by
outside interference.
However, if your vehicle is equipped with a CB radio
transceiver, etc. (even one with about 10 W output), it may, at
times, have an affect upon ECU operation, especially if the
antenna and feeder are installed nearby.
Therefore, observe the following precautions:
1. Install the antenna as far as possible from the ECU. The
ECU is located behind the glove box (MA) or passenger’s
kick panel (MS), so the antenna should be installed in the
rear of the vehicle.
2. Keep the antenna feeder as far .away as possible from the
ECU wires at least 20 cm (7.87 in.), and especially, do not
wind them together.
3. Insure that the feeder and antenna are properly adjusted.
4. Do not equip your vehicle with a powerful mobile radio
system.
Do not open the cover or the case of the ECU unless
absolutely necessary. (If the IC terminals are touched, the
. . .
IC may be destroyed by static electricity.1
AIR INDUCTION SYSTEM
1.
2. Separation the engine oil dipstick, oil filler cap, PCV hose,
etc., may cause the engine to run out of tune.
Disconnection, looseness or cracks in the parts of the air
induction system between the air flow meter and cylinder
head will allow air suction and cause the engine to run out
of tune.
TM-GE (MS)
7M-GTE
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.
