TEST
ACTION
APPLICABILITY
6
Remove the transmission oil pan and Valve body and inspect the Solenoid Switch
Valve for sticking in its bore, repair or replace as necessary.
NOTE: This DTC may be caused by debris lodged in the Transmission
Solenoid Switch Valve bore. If debris is found, clean the valve body and
reassemble the transmission per the Service Information.
With the scan tool, record the DTC EVENT DATA for P1776 and erase DTCs.
Reassemble the transmission and test drive the vehicle. Try to duplicate the original
set conditions using the DTC EVENT DATA recorded earlier.
With the scan tool, check Transmission DTCs.
Did the DTC P1776 reset?
All
Yes
→ Replace the Transmission Solenoid Assembly per the Service
Information.
Perform 40/41TE (NGC) TRANSMISSION VERIFICATION
TEST - VER 1.
No
→ Test Complete
Perform 40/41TE (NGC) TRANSMISSION VERIFICATION
TEST - VER 1.
7
Turn the ignition off to the lock position.
Disconnect the PCM harness connector.
Disconnect the Transmission Solenoid/Pressure Switch Assembly harness connector.
Note: Check connectors - Clean/repair as necessary.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the L/R Pressure Switch Sense circuit from the Pinout Box
to the Transmission Solenoid/Pressure Switch Assembly harness connector.
Is the resistance above 5.0 ohms?
All
Yes
→ Repair the L/R Pressure Switch Sense circuit for an open.
Perform 40/41TE (NGC) TRANSMISSION VERIFICATION
TEST - VER 1.
No
→ Go To 8
8
Turn the ignition off to the lock position.
Disconnect the PCM harness connector.
Disconnect the Transmission Solenoid/Pressure Switch Assembly harness connector.
Note: Check connectors - Clean/repair as necessary.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance between ground and the L/R Pressure Switch Sense circuit.
Is the resistance below 5.0 ohms?
All
Yes
→ Repair the L/R Pressure Switch Sense circuit for a short to
ground.
Perform 40/41TE (NGC) TRANSMISSION VERIFICATION
TEST - VER 1.
No
→ Go To 9
148
TRANSMISSION - NGC
P1776-SOLENOID SWITCH VALVE LATCHED IN LR POSITION —
Continued