Notes On Intermittents

Manipulate circuit No. 472 wiring, the Mat sensor and ECM connector while observing ECM parameter code "ED05". If failure is induced, manifold air temperature will jump from its normal value to shorted reading of 288-304°F (142-151°C).

Fig 1: Hard Trouble Code E037 - Shorted Mat Sensor Circuit

Fig 2: Hard Trouble Code E037 - Shorted Mat Sensor Circuit

Fig 3: Schematic for Hard Trouble Code E037