Blower and Engine Cooling Fan

Idle Up System Schematic:

A faulty idle-up system will set one of two trouble codes in the on-board diagnostic system. Code 62 is caused by lighting switch or rear window defogger switch problems. Code 63 sets if the fan motor switch is bad. Wiring and/or bad connection problems in those circuits can also set the codes. Refer to the schematic diagram and test the system with the diagnostic chart.

Wire color code identification:

L: Blue
B: Black
Y: Yellow
G: Green
R: Red
W: White
Br: Brown
Lg: Light green
Gr: Gray

Idle Up System Diagnostic Chart (Code 62):

Idle Up System Diagnostic Chart (Code 63):

IDLE-UP SYSTEM DIAGNOSTIC CHARTS