Urea Pump Inspection

Inspect the level sensor.

1. Measure the resistance according to the value(s) in the table below.
   

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   14(LV1) - 6(ELV1)	Float position is upper	23.37 to 24.47 kΩ
   	Float position is lower	1.40 to 1.46 kΩ

   Text in Illustration

   *a	Component without harness connected (Urea Pump)
   *b	Upper
   *c	Lower

Inspect the tank heater.

1. Measure the resistance according to the value(s) in the table below.
   

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   9(TH+) - 11(TH-)	25°C (77°F)	1.39 to 1.54 kΩ

   Text in Illustration

   *a	Component without harness connected (Urea Pump)

Inspect the temperature sensor.

1. Measure the resistance according to the value(s) in the table below.
   

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   1(TUW) - 2(ETUW)	20°C (68°F)	2.47 to 2.56 kΩ
   	30°C (86°F)	1.69 to 1.75 kΩ

   Text in Illustration

   *a	Component without harness connected (Urea Pump)

Inspect the pump motor.

1. Measure the resistance according to the value(s) in the table below.
   

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   7(PHAA) - 8(PHAB)	20 to 30 °C (68 to 86°F)	0.35 to 0.43 Ω
   7(PHAA) - 16(PHAC)
   8(PHAB) - 16(PHAC)
   7(PHAA) - 15(MGND)	Always	10 kΩ or higher
   8(PHAB) - 15(MGND)
   16(PHAC) - 15(MGND)

   Text in Illustration

   *a	Component without harness connected (Urea Pump)

   If the result is not as specified, replace the urea pump.