Honda 2004 Odyssey Service Manual page 951

Automatic Transmission
DTC Troubleshooting (cont'd)
DTC P0780: Mechanical Problem in Hydraulic
Control System of Shift Solenoid Valve A and
A/T Clutch Pressure Control Solenoid Valves
A and B, or Problem in the Hydraulic Control
System
NOTE:
• Record all freeze data and review General
Troubleshooting Information (see page 14-247)
before you troubleshoot.
• Keep these replacement solenoid valves on hand:
– Shift solenoid valve A
– A/T clutch pressure control solenoid valves A and B
1. Check whether the scan tool or the HDS indicates
another code.
Does the scan tool or the HDS indicate another
code?
YES Perform the Troubleshooting Flowchart for
the indicated code(s). Recheck for code P0780 after
troubleshooting.
NO Go to step 2.
2. Turn the ignition switch OFF.
3. Replace the shift solenoid valve A (see page 14-
359), and A/T clutch pressure control solenoid
valves A and B (see page 14-361).
4. Clear the DTC with scan tool or the HDS.
5. Drive the vehicle for several minutes in 1st, 2nd,
3rd, 4th, and 5th gears in the D position.
6. Recheck for code P0780.
Does the scan tool or the HDS indicate code
P07 80?
YES Replace the transmission.
NO The problem has been corrected.
14-338