TEST ACTION APPLICABILITY
2 With the DRBIIIt, check for other transmission DTC’s
Is the DTC P0841 present also?
All
Yes → Refer to the Transmission category and perform the appropriate
symptom.
Perform 41TE (NGC) TRANSMISSION VERIFICATION TEST -
VER 1.
No → Go To 3
3 With the DRBIIIt, Check the STARTS SINCE SET counter for P1776.
NOTE: This counter only applies to the last DTC set.
Is the STARTS SINCE SET counter 2 or less?
All
Yes → Go To 4
No → Go To 11
4 Turn the ignition off to the lock position.
CAUTION: Removal of the Starter Relay is to prevent a Transmission, NO
RESPONSE, condition and disable the starter.
Install the Transmission Simulator, Miller tool #8333 and the Electronic Transmis-
sion Adapter kit 8333-1A.
Ignition on, engine not running.
With the Transmission Simulator, turn the Pressure Switch selector switch to L/R.
With the DRBIIIt monitor the L/R Pressure Switch State while pressing the
Pressure Switch Test button on the Transmission Simulator.
Did the Pressure Switch state change from open to closed when test button was
pressed?
All
Yes → Go To 5
No → Go To 6
5 If there are no possible causes remaining, view repair. All
Repair
Repair Internal Transmission as necessary. Inspect the Solenoid
Switch Valve per the Service Information and repair or replace as
necessary. If no problems are found, replace the Transmission
Solenoid/Pressure Switch Assembly.
Perform 41TE (NGC) TRANSMISSION VERIFICATION TEST -
VER 1.
6 Turn the ignition off to the lock position.
Disconnect the Transmission Solenoid/Pressure Switch Assembly harness connector.
Remove the Transmission Control Relay.
Note: Check connectors - Clean/repair as necessary.
Connect a jumper wire between the Fused B+ circuit and the Transmission Control
Relay Output circuit in the Transmission Control Relay connector.
Using a 12-volt test light connected to ground, check the Transmission Control Relay
Output circuit in the Solenoid/Pressure Switch Assembly harness connector.
NOTE: The Test light must illuminate brightly. Compare the brightness to
that of a direct connection to the battery.
Does the test light illuminate brightly?
All
Yes → Go To 7
No → Repair the Transmission Control Relay Output circuit for an
open. If the fuse is open make sure to check for a short to ground.
Perform 41TE (NGC) TRANSMISSION VERIFICATION TEST -
VER 1.
159
TRANSMISSION - NGC
P1776-SOLENOID SWITCH VALVE LATCHED IN LR POSITION —
Continued
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