DTC P2826: Short in Line Pressure Solenoid Valve A Circuit

WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, and review the GENERAL TROUBLESHOOTING INFORMATION
This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.

Turn the ignition switch to ON (II).
Clear the DTC with the HDS.
Raise the vehicle on a lift, make sure it is securely supported, and allow all four wheels to rotate freely.
Start the engine. With the brake pedal pressed, shift to D, then release the brake pedal.
Monitoring the APP Sensor (%) with HDS in the A/T Data List, press (2 % opened) and release (0 % opened) the accelerator pedal every 2 seconds.
Check for Pending or Confirmed DTCs with the HDS.
Is DTC P2826 indicated?

YES -Go to step 7.

NO -Intermittent failure, the system is OK at this time. Check for poor connections and loose terminals between line pressure solenoid valve A and the PCM.
Turn the ignition switch to LOCK (0).
Check for a blown No. 18 (10 A) fuse in the under-dash fuse/relay box.
Is the No. 18 (10 A) fuse OK?

YES -Go to step 9.

NO -Repair a short to body ground in the wire between PCM connector terminal B2 and the under-dash fuse/relay box.
Jump the SCS line with the HDS.
Disconnect PCM connector B (49P).
Turn the ignition switch to ON (II).
Measure the voltage between PCM connector terminal B2 and body ground.

Fig 1: Measuring Voltage Between PCM Connector Terminal B2 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES -Go to step 13.

NO -Repair an open in the wire between PCM connector terminal B2 and the under-dash fuse/relay box.
Turn the ignition switch to LOCK (0).
Connect PCM connector B (49P).
Disconnect the line pressure solenoid valve A connector.
Turn the ignition switch to ON (II).
Clear the DTC with the HDS.
Start the engine. With the brake pedal pressed, shift to D, then release the brake pedal.
Monitoring the APP Sensor (%) with HDS in the A/T Data List, press (2 % opened) and release (0 % opened) the accelerator pedal every 2 seconds.
Check for Pending or Confirmed DTCs with the HDS.
Is DTC P2826 indicated?

YES -Go to step 21.

NO -Faulty line pressure solenoid valve A. Replace the secondary valve body (line pressure solenoid valve A) (see SECONDARY VALVE BODY REPLACEMENT ).
Turn the ignition switch to LOCK (0).
Jump the SCS line with the HDS.
Disconnect PCM connector B (49P).
Check for continuity between PCM connector terminal B44 and body ground.

Fig 2: Checking For Continuity Between PCM Connector Terminal B44 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair a short to body ground in the wire between PCM connector terminal B44 and line pressure solenoid valve A connector terminal No. 2.

NO -Replace the PCM (see PCM REPLACEMENT ).