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Error
Location
Type
Description
Cause
Solution
Short circuit of
motor wiring.
Check wiring to the motor
to ensure no bare wires are
touching and that no wires
are shorted to ground.
Motor will not
rotate.
Remove pump gear
housings from motor
and check that motor shaft
rotates freely in direction
indicated on motor housing.
Damaged gear
train.
Check pump gear trains
for damage and repair or
replace as necessary.
A4NM
MCM
High Motor Current
Chemical pump is
stuck.
Repair or replace chemical
pump.
A7DA
Heater A
Unexpected Current
A
Shorted TCM
If error cannot be cleared
or regenerates consistently,
replace module.
A7DB
Heater B
Unexpected Current
B
Shorted TCM
If error cannot be cleared
or regenerates consistently,
replace module.
A7DH
Hose
Unexpected Current
Hose
Shorted TCM
If error cannot be cleared
or regenerates consistently,
replace module.
333024A
15