DTC P2534 or P2537
Diagnostic Instructions
DTC Descriptors
| DTC P2534 00: Ignition Voltage Out of Range
Malfunction |
| DTC P2537 00: Accessory Power Circuit
Malfunction |
Diagnostic Fault Information
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
Ignition
|
P2534 00
|
P2534 00
|
-
|
-
|
Accessory Ignition
|
P2537 00
|
P2537 00
|
-
|
-
|
|
| |
Circuit/System Description
The transmission control module (TCM) continuously monitors the
system voltage on the ignition and the accessory ignition circuit.
Lower than normal voltage may be inadequate to operate the
transmission control solenoids properly.
Conditions for Running the DTC
| • |
Engine speed is greater than
400 RPM. |
| • |
Ignition voltage is between
10.2-18.0 V. |
Conditions for Setting the DTC
P2534 00
The TCM detects that the ignition voltage is less than 8.6 V for 1
s.
P2537 00
The TCM detects that the accessory ignition voltage is less than
8.6 V for 1 s.
Action Taken When the DTC Sets
P2534 00
DTC P2534 is a Type B DTC.
P2537 00
DTC P2537 is a Type C DTC.
Conditions for Clearing the DTC
P2534 00
DTC P2534 is a Type B DTC.
P2537 00
DTC P2537 is a Type C DTC.
Reference Information
Schematic Reference
Connector End View Reference
Component Connector End Views
Description and Operation
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Engine running, observe the Ignition Voltage Signal parameter.
The reading should be 12-15 V.
Circuit/System Testing
| 1. |
Ignition OFF, key out, measure
the battery voltage at the battery terminals. Verify the voltage is
11-13 V. |
| 2. |
Disconnect the X1 harness
connector at the K71 Transmission Control Module. |
| 3. |
Test for less than 5 Ω
between the ground circuit terminal 9 X1 and ground. |
| ⇒ |
If greater than the specified value, test the
ground circuit for an open/high resistance. |
| 4. |
Test for greater than 11 V
between the B+ circuit terminal 1 X1 and ground. |
| ⇒ |
If less than the specified value, test the B+
circuit for a short to ground or an open/high resistance. |
| 5. |
Ignition switch in the
ACCESSORY position, test for greater than 11 V between the
accessory ignition circuit terminal 12 X1 and ground. |
| ⇒ |
If less than the specified value, test the
accessory ignition circuit for a short to ground or an open/high
resistance. |
| 6. |
Ignition switch in the RUN
position, test for greater than 11 V between the ignition circuit
terminal 11 X1 and ground. |
| ⇒ |
If less than the specified value, test the
ignition circuit for a short to ground or an open/high
resistance. |
| 7. |
If all circuits test normal,
replace the K71 Transmission Control Module. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
Control Module References for TCM replacement, setup and
programming
|
