Chrysler PT Cruiser 2001 Service Manual Supplement page 2871

P1788-2/4 HYDRAULIC PRESSURE TEST FAILURE —
TEST
8 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 9
→ Repair cause of unlit or dim test light. (Open circuit or high
No
9 Turn ignition off to the lock position.
Disconnect the TCM harness connector.
Disconnect the Transmission Solenoid/Pressure Switch connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the 2-4 Pressure Switch Sense circuit from the TCM
connector to the transmission solenoid/pressure switch connector.
Is the resistance above 5.0 ohms?
Yes → Repair the open 2-4 Pressure Switch Sense circuit.
→ Go To 10
No
10 Turn ignition off to the lock position.
Disconnect the TCM harness connector.
Disconnect the Transmission Solenoid/Pressure Switch connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance between ground and the 2-4 Pressure Switch Sense circuit.
Is the resistance below 5.0 ohms?
Yes → Repair the 2-4 Pressure Switch circuit for a short to ground.
→ Go To 11
No
11 Turn ignition off to the lock position.
Disconnect the TCM harness 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).
Ignition on, engine not running.
Measure the voltage of the 2-4 Pressure Switch Sense circuit in the TCM connector.
Is the voltage above 3.0 volts?
Yes → Repair 2-4 Pressure Switch Sense circuit short to voltage.
→ Go To 12
No
ACTION
resistance in Trans Relay Output circuit)
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
123
TRANSMISSION
Continued
APPLICABILITY
All
All
All
All