Notes On Intermittents

Manipulate circuit Nos. 472 and 476 wiring, MAT connector, and ECM connector while observing ECM parameter code "ED05". If failure is induced, MAT will jump from its normal value to open signal circuit reading of -31 to -40°F (-35 to -40°C).

Fig 1: Hard Trouble Code E038 - Open Mat Sensor Circuit

Fig 2: Hard Trouble Code E038 - Open Mat Sensor Circuit (1 of 2)

Fig 3: Hard Trouble Code E038 - Open Mat Sensor Circuit (2 of 2)

Fig 4: Schematic for Hard Trouble Code E038