DTC P0562
Circuit Description
The transmission control module (TCM) requires a switched ignition voltage to operate.
The voltage signal should be direct from the ignition switch to avoid any interference.
DTC P0562 is a type C DTC.
Conditions for Running the DTC
The components are powered and ignition voltage is greater than 9.0 volts and
less than 18 volts.
The engine speed is greater than 450 RPM for 10 seconds.
Conditions for Setting the DTC
DTC P0562 sets when the TCM detects ignition voltage below 8.0 volts at 0°C (32°F) for
a total of 5 out of 7 seconds. The voltage threshold is temperature dependant, varying
from 5.0 volts at −60°C (−75°F) to 9.0 volts at 20°C (68°F).
Action Taken When the DTC Sets
The TCM does not illuminate the malfunction indicator lamp (MIL).
The transmission fails to hydraulic default.
DTC P0562 will be stored in TCM history.
The TCM inhibits torque converter clutch (TCC) engagement.
The TCM freezes shift adapts (DNA).
Conditions for Clearing the DTC
A scan tool can clear the code from TCM history. The TCM automatically clears the
DTC from TCM history if the vehicle completes 40 warm-up cycles without failure.
Diagnostic Aids
Inspect for the presence of aftermarket accessories, such as a remote starter, etc.
Depending on how these aftermarket accessories are installed, they may interfere
with the required voltage for proper operation of the transmission.
Inspect the wiring for poor electrical connections at the TCM. Inspect for the
following conditions:
o A bent terminal
o A backed-out terminal
o A damaged terminal
o Poor terminal tension
o A chafed wire
o A broken wire inside the insulation
When diagnosing for an intermittent short or open, massage the wiring harness
while watching the test equipment for a change.
Inspect the batteries for proper voltage.
Inspect the charging system for proper operation.
You may have to drive the vehicle in order to experience a condition.
Inspect for the presence of aftermarket accessories, such as remote starters, etc.
Depending on how these aftermarket accessories are installed, they may interfere
with the required voltage for proper operation of the transmission.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
2. This step tests B+ voltage.
3. This step tests the status of the charging system.
DTC P0562
Step Action Value Yes No
Schematic Reference: Automatic Transmission Controls Schematics
Did you perform the Diagnostic System Check Go to Diagnostic
– Automatic Transmission? System Check -
1 —
Go to Automatic
Step 2 Transmission
1. Install the scan tool.
2. Turn ON the ignition, with the engine
OFF.
Important: Before clearing the DTC,
use the scan tool in order to record the
Freeze Frame and Failure Records for
reference. The Clear Info function will
2 10.5 V
erase the data.
3. Record the DTC Freeze Frame and
Failure Records.
4. Clear the DTC.
5. With the scan tool, monitor the ignition
signal voltage in the TCM data list. Go to
Step 4 Go to Step 3
DTC P0562
Step Action Value Yes No
Is the voltage greater than the specified value?
Test the ignition feed circuit to the TCM for
high resistance or an open. Refer to Circuit
3 Testing and Wiring Repairs. —
Go to
Did you find and correct the condition? Step 7 Go to Step 5
1. Inspect for poor connections at the
TCM. Refer to Testing for Intermittent
Conditions and Poor Connections.
2. If you find a poor connection, repair the
4 —
condition, as necessary. Refer to Wiring
Repairs.
Go to
Did you find and correct the condition? Step 7 Go to Step 6
Repair the ignition feed circuit to the TCM for
an open or a short to ground. Refer to Wiring
5 Repairs. — —
Go to
Did you complete the repair? Step 7
Important: In most cases the TCM is not at
fault. Attempt swapping with a known good
TCM prior to replacing the TCM.
6 — —
Replace the TCM. Refer to Transmission
Control Module Replacement.
Go to
Did you complete the replacement? Step 6
Perform the following procedure in order to
verify the repair:
1. Clear the DTC.
2. Using the scan tool, monitor TCM
7 —
voltage.
3. Select Specific DTC.
4. Enter DTC P0562.
System
Has the test run and passed? OK Go to Step 1
