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The A604: TCM Error Codes
The A604 has a very advanced (for its time) electrical system which uses sensors, computers and all kinds of goodies to try to troubleshoot the A604 in real time. This can help prevent damage by turning on limp mode when something is thought to be broken.
Chrysler's main flaw with this system, is that it requires a TCM code reader to get the codes- this is an expensive device that not everyone can afford. Fortunitely someone has developed an expiramental DIY-code reader.
After getting a code reader, building a code reader or paying a shop to get the codes off of the TCM, you can get an idea what the TCM thinks is going on- which is uber helpful in A604 troubleshooting.
Here is a list of codes that cause limp mode
|
Error Codes That Cause Limp |
|
11 |
|
13 |
|
14 |
|
15 |
|
16 |
|
17 |
|
18 |
|
20 |
|
21 |
|
22 |
|
23 |
|
24 |
|
25 |
|
26 |
|
27 |
|
31 |
|
32 |
|
33 |
|
36 |
|
39 |
|
41 |
|
42 |
|
43 |
|
44 |
|
47 |
|
50 |
|
51 |
|
52 |
|
53 |
|
54 |
|
56 |
|
57 |
|
58 |
Now here is a nice chart that tells you what each code stands for:
|
Error Code |
What the TCM thinks is wrong |
|
11 |
Internal A604 Controller |
|
12 |
Battery has recently been disconnected |
|
13 |
Internal A604 Controller |
|
14 |
EATX Relay Always On |
|
15 |
EATX Relay Always Off |
|
16 |
Internal A604 Controller |
|
17 |
Internal A604 Controller |
|
18 |
Engine Speed Signal Circuit (RPM) |
|
19 |
CCD Bus Communication with PCM |
|
20 |
Battery (Switched) Connection |
|
21 |
OD Prssure Switch |
|
22 |
2/4 Pressure Switch |
|
23 |
2/4 & OD Pressure Switch |
|
24 |
L/R Pressure Switch |
|
25 |
L/R & OD Pressure Switch |
|
26 |
L/R & 2/4 Pressure Switch |
|
27 |
All Pressure Switchs |
|
28 |
PRNDL switch signal |
|
29 |
TBPS signal |
|
31 |
OD hydraulic pressure switch |
|
32 |
2/4 hydraulic pressure switch |
|
33 |
OD & 2/4 hydraulic pressure switch |
|
36 |
faults immediately after shift |
|
37 |
solenoid switch valve stuck |
|
38 |
lockup controller |
|
39 |
gear ratio fault |
|
41 |
L/R solenoid circuit fault |
|
42 |
2/4 solenoid circuit fault |
|
43 |
OD solenoid circuit fault |
|
44 |
UD solenoid circuit fault |
|
45 |
internal A604 controller |
|
46 |
Gear 3 to Gear 4 shift aborted |
|
47 |
solenoid switch valve stuck |
|
50 |
gear ratio fault in R |
|
51 |
gear ratio fault in Gear 1 |
|
52 |
gear ratio fault in Gear 2 |
|
53 |
gear ratio fault in Gear 3 |
|
54 |
gear ratio fault in Gear 4 |
|
56 |
turbine/speed sensor fault |
|
57 |
output speed sensor fault |
|
58 |
sensor(s) ground fault |
|
60 |
inproper L/R volume |
|
61 |
inproper 2/4 volume |
|
62 |
inproper OD volume |
|
63 |
inproper UD volume |
Ok, the two charts above get you a basic idea of whats going on- I have yet, but may in the future, add a more comprehensive description of what each TCM error code is- however I do not yet have the time for this. In the meantime, hopefully this will be of some help!