TEST ACTION APPLICABILITY
2 With the DRBIIIt, read Transmission DTC’s
Are there any Transmission Control Relay DTC’s 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 P0846.
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.
Remove the Starter Relay.
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.
Note: Check connectors - Clean/repair as necessary.
Ignition on, engine not running.
With the Transmission Simulator turn the Pressure Switch selector to 2/4.
With the DRBIIIt, monitor the2/4 Pressure Switchstate while pressingthe Pressure
Switch Test button on the Transmission Simulator.
Did the state of the 2/4 Pressure Switch change while pressing the Pressure Switch
Test button?
All
Yes → Go To 5
No → Go To 6
5 If there are no possible causes remaining, view repair. All
Repair
Replace the Transmission Solenoid/Pressure SwitchAssembly per
the Service Information.
Perform 41TE (NGC) TRANSMISSION VERIFICATION TEST -
VER 1.
6 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 2/4 Pressure Switch Sense circuit from the appropriate
terminal of special tool #8815 to the Transmission Solenoid/Pressure Switch Assem-
bly harness connector.
Is the resistance above 5.0 ohms?
All
Yes → Repair the 2/4 Pressure Switch Sense circuit for an open.
Perform 41TE (NGC) TRANSMISSION VERIFICATION TEST -
VER 1.
No → Go To 7
112
TRANSMISSION - NGC
P0846-2/4 PRESSURE SWITCH SENSE CIRCUIT — Continued
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