Dodge Ram 2004, Service Manual

Page: 395 / 642

Symptom:
BLOWER NOT ON HIGH
When Monitored and Set Condition:
BLOWER NOT ON HIGH
When Monitored: When executing the Cooldown Test.
Set Condition: This message will be displayed if the blower is not operating at high speed
while the Cooldown Test is running.
POSSIBLE CAUSES
CHECK FOR HVAC DTCS
TEST SET UP CONDITIONS NOT MET
BLOWER/RELATED CIRCUITS
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIII
t
, read HVAC DTCs.
Does the DRBIII
t
display any HVAC DTCs?
All
Yes
→
Return to the symptom list and choose the symptom(s). After the
repair is complete, with the DRBIII
t
, erase the DTC(s). Cycle the
ignition switch. Start the engine. Set the blower control to high
speed. With the DRBIII
t
, actuate the Cooldown Test.
Perform BODY VERIFICATION TEST - VER 1.
No
→
Go To 2
2 Was the blower control set to high speed the entire time the Cooldown Test was
actuated? All
Yes
→
Check the blower motor and related circuits for blower operation
problems. Repair as necessary. After repair is complete, start the
engine. Set the blower control to high speed. With the DRBIII
t
,
actuate the Cooldown Test.
Perform BODY VERIFICATION TEST - VER 1.
No
→
Start the engine. Set the blower control to high speed. With the
DRBIII
t
, actuate the Cooldown Test.
Perform BODY VERIFICATION TEST - VER 1.
381
HEATING & A/C