Component Specifications
A/C RelayResistance between terminals 1 and 2 continuity
AAC Valve
Resistance value [1] 10 Ohms
Air Fuel Mixture
CO content [2] between 0.2 & 8.0 %
Air Regulator
Resistance value [1] 75 Ohms
Crank Angle Sensor
Output voltage
Between terminal 3 & ground [6] 5 vdc
Between terminal 4 & ground [5] 5 vdc
ECCS Relay
Resistance between terminals 1 and 2 continuity
Engine Temperature Sensor
Resistance Value
2.1 - 2.9 K ohms at 20° C (68° F)
0.68 - 1.0 K ohms at 50° C (122° F)
0.30 - .33 K ohms at 80° C (176° F)
EGR Solenoid
Operating voltage 12 vdc
Resistance value continuity
EGR Temperature Sensor
Resistance value [3] 85 K ohms
Fuel Injector
Resistance value [1] 10 - 14 Ohms
Fuel Pump
Resistance between terminals d and e [1] 1.5 Ohms
Fuel Pump Relay
Resistance between terminals 1 and 2 continuity
Ignition Coil
Supply voltage 12 vdc
Primary resistance [1] 1.0 Ohms
Secondary resistance [1] 10.0 K ohms
Ignition Resistor
Resistance value 2.2 K ohms
Knock Sensor
Resistance value between terminal e and ground continuity
Mass Air Flow Sensor
Output Voltage: [7]
terminal a to ground, engine idling with no load 1.5 - 2.0 VDC
terminal a to ground as engine is revved up to 3.0 VDC
Power Transistor
Resistance Between Terminals:
a (+ lead) & b (- lead) no continuity
a (+ lead) & c (- lead) no continuity
b (+ lead) & a (- lead) some continuity
b (+ lead) & c (- lead) some continuity
c (+ lead) & a (- lead) some continuity
c (+ lead) & b (- lead) some continuity
NOTE: You MUST use a high quality (10 megohm impedance or more) DVOM for these tests. Be sure to follow the positive and negative lead instructions exactly as given. "Some continuity" is defined as any resistance between zero and infinite ohms.
Throttle Sensor
Resistance value terminals b & c
AT idle [1] 1 K ohm
AT 1/2 throttle [1] 1 K - 9 K ohm
AT full throttle [1] 9 K ohm
Voltage between terminals b and c at idle [1] 0.45 - 0.55 VDC
Throttle Valve Switch
Closes idle speed + 250 ± 150 rpm in neutral
Vehicle Speed Sensor
Resistance value [4] alternates between open & closed
[1] Approximately
[2] With 2.5 K ohm resistor in place of cylinder head
temperature sensor and with O2 sensor disconnected.
[3] At 100° C (212° F.
[4] Two times per revolution while turning sensor.
[5] Comes and goes 360 times per revolution.
[6] Comes and goes 3 times per revolution.
[7] Engine fully warmed up, MAF terminal connected.