Symptom:
P0218-HIGH TEMPERATURE OPERATION ACTIVATED
When Monitored and Set Condition:
P0218-HIGH TEMPERATURE OPERATION ACTIVATED
When Monitored: Whenever the engine is running. NOTE: This is an informational DTC
designed to aid the technician in diagnosing shift quality complaints.
Set Condition: Immediately when a Overheat shift schedule is activated when the
Transmission Oil Temperature reaches 155° C or 240° F.
POSSIBLE CAUSES
ENGINE COOLING SYSTEM MALFUNCTION
TRANSMISSION OIL COOLER PLUGGED
HIGH TEMPERATURE OPERATIONS ACTIVATED
TEST ACTION APPLICABILITY
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 DRBIIIt, read Engine DTC’s. Check and repair all Engine DTC’s prior to
performing any transmission symptom diagnostics.
With the DRBIIIt, 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.
All
Continue
Go To 2
2 Perform Engine Cooling System diagnostics per the Service Information.
Is the Engine Cooling System functioning properly?
All
Yes → Go To 3
No → Repair the cause of the engine overheating. Refer to the Service
Information for the related symptoms or repair procedures.
Perform 41TE (NGC) TRANSMISSION VERIFICATION TEST -
VER 1.
35
TRANSMISSION - NGC
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