Chrysler Concorde 2004 Service Manual page 1286

TRANSMISSION - NGC
P0888-RELAY OUTPUT ALWAYS OFF —
TEST
1 NOTE: Low fluid level can be the cause of many transmission problems. If
the fluid level is low locate and repair the leak then check and adjust the
fluid level per the Service Information.
NOTE: Always perform diagnostics with a fully charged battery to avoid
false symptoms.
With the DRBIII , read Engine DTC's. Check and repair all Engine DTC's prior to
performing any transmission symptom diagnostics.
With the DRBIII , read Transmission DTC's. Record all DTC's and 1 Trip Failures.
NOTE: Diagnose 1 Trip Failures as a fully matured DTC.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Repair as necessary.
Perform the Shift Lever Position Test. If the test does not pass, refer to Symptom test
for P0706 Check Shifter Signal.
For Gear Ratio DTC's, check and record all CVI's.
Most DTC's set on start up but some must be set by driving the vehicle such that all
diagnostic monitors have run.
NOTE: Verify flash level of Powertrain Control Module. Some problems are
corrected by software upgrades to the Transmission and Engine software.
NOTE: Check for applicable TSB's related to the problem.
Perform this procedure prior to Symptom diagnosis.
Continue
2 With the DRBIII , Check the STARTS SINCE SET counter for P0888.
Note: This counter only applies to the last DTC set.
Is the STARTS SINCE SET counter equal to 0?
Yes → Go To 3
→ Go To 11
No
3 Turn the ignition off to the lock position.
Remove the Transmission Control Relay.
Note: Check connectors - Clean/repair as necessary.
Using a 12-volt test light connected to ground, check the Fused B+ circuit in the
Transmission Control Relay 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?
Yes → Go To 4
→ Repair the Fused B+ circuit for an open. If the fuse is open make
No
4 Turn the ignition off to the lock position.
Remove the Transmission Control Relay.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance between ground and the Transmission Control Relay ground
circuit.
Is the resistance above 5.0 ohms?
Yes → Repair the Transmission Control Relay Ground circuit for an
→ Go To 5
No
ACTION
Go To 2
sure to check for a short to ground.
Perform 42LE (NGC) TRANSMISSION VERIFICATION TEST -
VER 1.
open.
Perform 42LE (NGC) TRANSMISSION VERIFICATION TEST -
VER 1.
Continued
126
APPLICABILITY
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