Chrysler PT Cruiser 2001 Service Manual Supplement page 2752

GENERAL INFORMATION
The Malfunction Indicator Lamp (MIL) will turn
off after 3 good trips (see section 12.3) or when the
DTC's are cleared from the TCM.
3.3.6 LIST OF DIAGNOSTIC TROUBLE
CODES
(Detailed descriptions follow list)
The TCM may report any of the following DTC's.
DTC P-Code Name of Code
11 P0700 Internal TCM
12 P1792 Battery was disconnected
13 P0700 Internal TCM
14 P1767 Relay output always on
15 P1768 Relay output always off
16 P0605 Internal TCM
17 P0604 Internal TCM
18 P0725 Engine Speed input circuit
19 P1716 Bus communication with engine
module
20 P1765 Switched battery (Trans Relay
Output)
21 P1781 OD pressure switch sense circuit
22 P1782 24 pressure switch sense circuit
24 P1784 L-R pressure switch sense circuit
28 P0705 Check shifter signal
29 P0120 Throttle position sensor signal
circuit
31 P1787 OD hydraulic pressure test failure
32 P1788 24 hydraulic pressure test failure
33 P1789 OD/24 hydraulic pressure test
falure
35 P1791 Loss of prime
36 P1790 Fault immediately after shift
37 P1775 Solenoid switch valve latched in
TCC position
38 P0740 Torque converter clutch control
circuit
41 P0750 L-R Solenoid Circuit
42 P0755 2-4 Solenoid Circuit
43 P0760 OD Solenoid Circuit
44 P0765 UD Solenoid Circuit
45 P1795 Internal TCM
47 P1776 Solenoid switch valve latched in
L-R position
48 P1793 TRD link communication error
50 P0736 Gear ratio error in reverse
51 P0731 Gear ratio error in 1st
52 P0732 Gear ratio error in 2nd
53 P0733 Gear ratio error in 3rd
54 P0734 Gear ratio error in 4th
56 P0715 Input speed sensor error
57 P0720 Output speed sensor error
58 P1794 Speed sensor ground error
70 P1796 Autostick sensor circuit
71 P1797 Manual shift overheat
73 P1798 Worn out/burnt transmission fluid
74 P1799 Calculated oil temperatue in use
75 P1738 High temperature operation
activated
76 P1739 Power up at speed
DTC P-Code
77 P1717
78 P0600
79 P1714
Yes (underlined) indicates that this DTC can take up to five min-
utes of problem identification before illuminating the MIL.
*Only with code 28 set.
3.3.7 DTC DESCRIPTIONS
Limp-in MIL
Name of code: P-0700(12) — Battery was Discon-
Yes Yes
nected
No No
When monitored: Whenever the key is in the
Yes Yes
Run/Start position.
Yes Yes
Set condition: This code is set whenever the
Yes Yes
Transmission Control Module (TCM) is discon-
Yes Yes
nected from battery power (B+) or ground. It will
Yes Yes
also be set during the DRBIII
Yes Yes
Disconnect procedure.
No No
Theory of operation: A battery backed RAM
(Random Access Memory) is used to maintain some
Yes Yes
learned values. When the battery B(+) is discon-
Yes* Yes
nected, the memory is lost. When the B(+) is re-
Yes Yes
stored, this memory loss is detected by the TCM.
Yes Yes
The code is set and the learned values are initial-
No No
ized to known constants or previously learned val-
No No
ues from EEPROM (Electronic Erasable Program-
mable Read Only Memory). This results in the
Yes Yes
reinitialization of some parameters.
Yes Yes
Transmission Effects: Loss of trouble code data.
Yes Yes
Immediate limp-in mode if power is lost while
operating the vehicle. Normal operation is resumed
No No
if the power is restored during the same key start.
No No
Possible causes:
No Yes
> Battery voltage removed from TCM
No Yes
> TCM disconnected
Yes Yes
> Dead Battery
Yes Yes
> Low battery voltage during cranking
Yes Yes
> Quick Battery Disconnect by DRBIII or MDS
Yes Yes
> Bad TCM ground circuit
No No
Yes Yes
Name of code: P-1767(14) — Relay Always On
When monitored: Ignition key is turned from
No No
''off '' to "run" position and/or ignition key is turned
Yes Yes
from ''crank'' position to ''run'' position.
Yes Yes
Set condition: This code is if the Transmission
Yes Yes
Control Module (TCM) senses greater than 3 volts
Yes Yes
at the Trans Relay Output (switched battery) ter-
Yes Yes
minal of the TCM prior to the TCM energizing the
Yes Yes
relay.
Yes Yes
Theory of operation: The transmission control
Yes Yes
relay is used to supply power to the solenoid pack
No No
when the transmission is in normal operating
No No
mode. When the relay is off, no power is supplied to
No No
the solenoid pack and the transmission is in ''limp-
No No
in'' mode. The relay output is fed back to the TCM
No No
through pins 16 and 17. It is referred to as the
No No
Trans Relay Output circuit or ''switched battery''.
4
Name of Code
No communication with the MIC
Serial communication link
malfunction
Low battery voltage
Quick Battery
Limp-in MIL
No No
No No
Yes Yes