Chrysler PT Cruiser 2001 Service Manual Supplement page 2855

P1781-OD PRESSURE SWITCH SENSE CIRCUIT —
TEST
3 With the DRBIII , Check the STARTS SINCE SET counter.
NOTE: This counter only applies to the last DTC set.
Is the STARTS SINCE SET counter 2 or less?
Yes → Go To 4
→ Go To 11
No
4 Turn ignition off to the lock position.
CAUTION: Remove the Starter Relay from the PDC. This will prevent the
vehicle from being started in gear.
Install Transmission simulator (Miller tool #8333) and the FWD Adapter Cable
kit.(Miller tool #8333-1).
Note: Check connectors - Clean/repair as necessary.
Ignition on, engine not running.
Place pressure switch selector on OD.
Observe the OD Pressure Switch state on the DRBIII , while pressing pressure
switch test button.
Did the state of the OD Pressure Switch change while pushing the button?
Yes → Go To 5
→ Go To 6
No
5 If there are no possible causes remaining, replace the Solenoid/Pressure switch
assembly.
View repair options.
Repair
6 Turn ignition off to the lock position.
Disconnect the Transmission Solenoid/Pressure Switch connector.
Remove the Transmission Control Relay from the PDC.
Note: Check connectors - Clean/repair as necessary.
Connect a jumper wire between the Fused B(+) and Transmission Control Relay
Output circuits in the Transmission Control Relay connector (In PDC).
Connect the ground clip of a test light to a known good ground.
Probe the Transmission Relay Output circuit in the Solenoid/PS connector with the
test light
Note: The light must illuminate brightly, if it does not light, or lights dimly,
the circuit must be repaired. If there is any doubt, compare the brightness
when testing the circuit, to the brightness when connected directly to the
battery.
Does the light illuminate brightly?
Yes → Go To 7
→ Repair cause of unlit or dim test light. (Open circuit or high
No
ACTION
Replace Transmission Solenoid/Pressure switch assembly as re-
quired.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
resistance in Trans Relay Output circuit)
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
107
TRANSMISSION
Continued
APPLICABILITY
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