DTC P0601-P0604 or P062F
Diagnostic Instructions
DTC Descriptors
Note: DTCs P0601, P0602, P0603,
P0604 or P062F could set in other control modules. Verify the DTCs
are set in the transmission control module (TCM).
DTC P0601: Control Module Read Only Memory
Performance
DTC P0602: Control Module Not Programmed
DTC P0603: Control Module Long Term Memory Reset
DTC P0604: Control Module Random Access Memory
Performance
DTC P062F: Control Module Long Term Memory
Performance
Circuit/System Description
This is an internal fault detection of the control solenoid
valve assembly. This fault is handled inside the control solenoid
valve assembly and no external circuits are involved.
Conditions for Running the DTC
Ignition voltage is between 9.0 and 18.0 volts.
Conditions for Setting the DTC
P0601
The read only memory (ROM) test has failed 5 or more
times.
P0602
The TCM has not been programmed and is unable to detect the
start program.
P0603
The TCM has detected a memory checksum error.
P0604
The TCM random access memory (RAM) test has failed 5 or
more times.
P062F
The TCM has detected a non-volatile memory error during
power-down.
Action Taken When the DTC Sets
P0601, P0603, P0604, and P062F
• |
DTCs P0601, P0603, P0604, and P062F are
Type A DTCs. |
• |
The TCM commands maximum line pressure. |
• |
The TCM forces the torque converter
clutch (TCC) OFF. |
• |
The TCM inhibits TCC engagement. |
• |
The TCM freezes transmission adaptive
functions. |
• |
The TCM commands the high side driver OFF. |
• |
The TCM defaults the transmission to 5th gear and
reverse. |
• |
Torque management is enabled. |
• |
The TCM inhibits Tap Up/Down function. |
• |
The TCM inhibits manual shifting of forward
gears. |
P0602
• |
DTC P0602 is a type C DTC. |
• |
The TCM commands maximum line pressure. |
• |
The TCM forces the torque converter
clutch (TCC) OFF. |
• |
The TCM inhibits TCC engagement. |
• |
The TCM freezes transmission adaptive
functions. |
• |
The TCM defaults the transmission to 5th gear and
reverse. |
• |
The TCM inhibits Tap Up/Down function. |
• |
The TCM inhibits manual shifting of forward
gears. |
Conditions for Clearing the DTC
• |
DTCs P0601, P0603, P0604, and P062F are
Type A DTCs. |
• |
DTC P0602 is a type C DTC. |
Reference Information
Description and Operation
Refer to
Electronic Component Description for control solenoid valve
assembly information.
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Caution: Before programming a
control module, the following must be observed, or control module
damage may occur:
• |
The TIS terminal, MDI, and/or
scan tool must have the latest software. |
• |
The vehicle battery must be
fully charged. The battery voltage should be between 12-14
volts. |
• |
The TIS terminal, MDI, and/or
scan tool connections must be secure. |
• |
A battery charger must NOT be
connected to the battery when programming a control module.
|
- Ignition OFF for 1 minute.
- Ignition ON, with a scan tool, verify that
DTC P0602 is not set.
- Observe the DTC information with a scan tool. DTCs
P0601, P0603, P0604, and P062F should not set.
⇒ |
If DTC P0601, P0603, P0604 or P062F is set,
replace the Q8 control solenoid valve assembly. |
- After performing the above steps, verify that the DTC
does not reset by operating the vehicle within the Conditions for
Running the DTC. You may also operate the vehicle within the
conditions that you observed from the Freeze Frame/Failure Records
data. If the vehicle passes the Circuit/System Verification
procedure then, refer to
Testing for Intermittent Conditions and Poor Connections .
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
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