2010 Cadillac Truck Escalade RWD V8-6.2L Page 2528
2. Ignition ON, test the voltage on the ignition 1 circuit, between connector X1 terminal 20 and ground. The voltage should be within 0.5V of
actual battery voltage.
瀚慖f not within the specified range, test the signal circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the
PIM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
Control Module References (See: Testing and Inspection/Programming and Relearning) for PIM replacement, setup, and programming.
2ML70 - Automatic Transmission
DTC P2534
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptor
DTC P2534
- Ignition 1 Switch Circuit Low Voltage
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The transmission control module (TCM) samples the system voltage on the Ignition 1 voltage circuit every 0.1 seconds. Lower than normal voltage
may be inadequate to operate the transmission control solenoids properly. Improper solenoid operation may cause erratic transmission operation,
which may result in internal damage.
Conditions for Running the DTC
The TCM is communicating on the GMLAN serial data bus.
Conditions for Setting the DTC
The TCM detects less than 2 volts on the IGN voltage circuit at the TCM for greater than 10 seconds.
Action Taken When the DTC Sets
* P2534 is a Type A DTC.
* The TCM turns OFF all solenoids.
* The TCM commands maximum line pressure.
* The TCM freezes transmission adaptive functions.
Conditions for Clearing the DTC
P2534 is a Type A DTC.
