Toyota Supra 1990 Manual page 171

n.
EMISSION CONTROL SYSTEMS - Exhaust Gas Recirculation (EGR) System (7M-GTE) EC-19
FI1917
3. CHECK FOR OPEN CIRCUIT
Using an ohmmeter, measure the resistance between the
terminals.
Specified resistance: 38 - 44
n
at 20
D
C (68
D
F)
If the resistance is not within specification, replace the
VSV.
INSPECTION OF EGR VALVE
1. REMOVE EGR VALVE
Check the valve for sticking and heavy carbon deposits.
if a problem is found, replace it.
2. INSTALL EGR VALVE WITH NEW GASKET
INSPECTION OF WATER TEMP. SENSOR
(See page FI-113)