Operating instructions

61
Is harness plugged into Return
Temperature Sensor?
Is harness plugged into Control
Module J5?
_ P _ _ _
Blocking Error E 5 2 Return Sens Open
Replace Return
Temperature Sensor
Replace Control
Module
Check continuity of brown
wires between Return
Temperature Sensor and
Control Module J5-4 and J5-12
Continuity?
Measure Return Temperature
Sensor resistance with digital
meter. Estimate Sensor
temperature. Do temperature
and resistance fall within
ranges shown in chart?
Replace Wires
50 to 9010 to 32 9K to 24K ohms
150 to 200
90 to 130
°F°C Resistance
130 to 150
2K to 1K ohms 2K to 3K ohms 3K to 9K ohms
54 to 66 32 to 54 66 to 94
Return Temperature Sensor
Resistance Chart
YES NO
Insert Harness
YES NO
YES NO
13 - TROUBLE SHOOTING