Service Hints

EFI MAIN RELAY
2-5-2-3: Closed with Ignition SW at ON or ST position

C 6 CIRCUIT OPENING RELAY
1-2: Closed with starter running

I 6, I 7, I 8, I 9, I10, I11 INJECTOR
1-2: 13.4-14.2 Ohms

P 1 PARK/NEUTRAL POSITION SW
5-6: Closed with A/T Shift Lever in P or N position

T 1 THROTTLE POSITION SENSOR
3-1: 0.2-0.8 K Ohms with clearance between lever and stop screw 0 mm (0 in.)
2-1: 2.3 K Ohms or less with clearance between lever and stop screw 0.50 mm (0.0197 in.)
Infinity with clearance between lever and stop screw 0.77 mm (0.0303 in.)
3-1: 3.3-10 K Ohms with throttle valve fully open
4-1: 4-9 K Ohms

E 3 ENGINE COOLANT TEMP. SENSOR
1-2: 10-20 K Ohms (-20° C, -4° F)
4-7 K Ohms (0° C, 32° F)
2-3 K Ohms (20°C, 68° F)
0.9-1.3 K Ohms (40° C, 104° F)
0.4-0.7 K Ohms (60° C, 140° F)
0.2-0.4 K Ohms (80° C, 176° F)

E 4-A, E 5-B, E 6-C, E 7-D ENGINE CONTROL MODULE
Voltage at ECU connectors
+B-E1: 9-14 Volts (Ignition SW ON)
BATT-E1: 9-14 Volts (always)
VCC-E2: 4.5-5.5 Volts (Ignition SW ON)
IDL-E2: 9-14 Volts (Ignition SW ON and Throttle valve open)
VTA-E2: 0.3-0.8 Volts (Ignition SW ON and Throttle valve fully closed)
3.2-4.9 Volts (Ignition SW ON and Throttle valve fully open)
IGT1, IGT2, IGT3-E1: Pulse generation (cranking or idling)
STA-E1: 6 Volts or more (Ignition SW at ST position)
#10, #20, #30, #40, #50, #60-E1: 9-14 Volts (Ignition SW ON)
W-E1: 9-14 Volts (no trouble and engine running)
THA-E2: 0.5-3.4 Volts (Ignition SW ON and intake air temp. 20° C, 68° F)
THW-E2: 0.2-1.0 Volts (Ignition SW ON and coolant temp. 80° C, 176° F)
SP1-E1: Pulse generation with vehicle moving
BK-E1: 7.5-14 Volts (Stop light SW ON)

RESISTANCE AT ECU WIRING CONNECTOR
(disconnect Wiring Connector)
IDL-E2: Infinity (Throttle valve open)
0-100 Ohms (Throttle valve fully closed)
VTA-E2: 3.3-10 K Ohms (Throttle valve fully open)
0.2-0.8 K Ohms (Throttle valve fully closed)
THA-E2: 2-3 K Ohms (intake air temp. 20° C, 68° F)
THW-E2: 0.2-0.4 K Ohms (coolant temp. 80° C, 178° F)
+B-E2: 0.2-0.4 K Ohms
NE-E1: 140-180 Ohms