Ohms Measurements

35 Position ECU Plug:

Connector View

CAUTION: When measuring Ohms disconnect the ECU from the harness plug and never turn the ignition key on. It is possible that failure to follow these steps will result in damage to the ECU.

GROUNDS
KEY OFF
Pin 18 to G1 CONTINUITY
Pin 18 to 34 (M/T only) CONTINUITY
Pin 18 to 35 CONTINUITY
Pin 8 to 18 CONTINUITY
Connect the computer for this reading only.
It is the shield for the 02 sensor and is an output from the computer.

COOLANT TEMPERATURE SENSOR
Pin 3 to 18
68°F 2200 - 2700 Ohms
176-194°F 150 - 300 Ohms

THROTTLE SWITCH
Pin 14 to 28 (Closed) CONTINUITY
Pin 14 to 31 (Full load) CONTINUITY

ALTITUDE SENSOR
Changes with Altitude
Pin 24 to 26 2100 - 2600 Ohms
Pin 24 to 25 200 - 3800 Ohms

COLD START INJECTOR
Winding
Pin 14 to 16 8 - 13 Ohms

ELECTRO-HYDRAULIC ACTUATOR
Winding(s)
Pin 4 to 5 17 - 22 Ohms

AIR FLOW SENSOR
Disconnect Altitude sensor before taking measurements.
At rest
Pin 24 to 26 (Ref.) 3300 - 3700 ohms
Pin 24 to 23 (load) 1000 - 1300 Ohms
Flap on air flow sensor closed or air flow senor plate at rest position. Resistance increases as flap or plate opens.
Pin 24 to 23 (load) 4300 - 5000 Ohms
Flap on air flow sensor opened to maximum or air flow plate deflected to maximum.

CARBON CANISTER VALVE
Winding(s)
Pin 14 to 15 30 - 60 Ohms

ISC VALVE
Winding(s)
Pin 14 to 17 4 - 12 ohms