P1787-Od Hydraulic Pressure Test Failure - Chrysler PT Cruiser 2001 Service Manual Supplement

Symptom:

P1787-OD HYDRAULIC PRESSURE TEST FAILURE

When Monitored and Set Condition:
P1787-OD HYDRAULIC PRESSURE TEST FAILURE
When Monitored: In any forward gear with engine speed above 1000 RPM shortly after
a shift and every minute thereafter.
Set Condition: After a shift into a forward gear, with engine speed > 1000 RPM, the TCM
momentarily turns on element pressure to the clutch ckts that don't have pressure to
identify the correct pressure sw closes. If the pressure sw does not close 2 times the code
sets
INCORRECT FLUID LEVEL
LOSS OF PRIME (P-1791) PRESENT
RELATED GEAR RATIO AND/OR PRESSURE SWITCH DTC'SS PRESENT
INTERMITTENT WIRING & CONNECTORS CONDITIONS
TRANSMISSION RELAY OUTPUT CIRCUIT OPEN
OD PRESSURE SWITCH SENSE CIRCUIT OPEN
OD PRESSURE SWITCH SENSE CIRCUIT SHORT TO GROUND
OD PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE
INTERNAL TRANSMISSION PROBLEM - OD PRESSURE TEST
TCM- (OD PRESSURE SWITCH)
TEST
1 Check fluid level and condition and adjust as necessary
Visually inspect connectors and wiring harness. Repair as necessary.
Check for leaks or other visible damage. Repair as necessary.
Perform the shift lever position test and adjust the linkage as necessary.
Connect a battery charger to the vehicle. Ensure the battery is fully charged.
With the DRBIII , read the PCM DTC's. Check and repair all PCM DTC's before
performing transmission diagnostics.
With the DRBIII , read the TCM DTC's.
Note: Check 1 trip failures and diagnose them as DTC's (Hard codes)
If you have a Gear Ratio DTC, check and record all CVI's.
Most DTC's set on start up but some must be set by driving the vehicle.
Note: Verify flash level of transmission controller. Some problems are
corrected by software upgrades to the transmission controller.
NOTE: Check for applicable TSB's related to the problem.
Perform this procedure prior to symptom diagnosis.
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POSSIBLE CAUSES
ACTION
Go To 2
117
TRANSMISSION
APPLICABILITY
All