Symptom:
P0453-NVLD PRESSURE SWITCH SENSE CIRCUIT HIGH
When Monitored and Set Condition:
P0453-NVLD PRESSURE SWITCH SENSE CIRCUIT HIGH
When Monitored: Engine Running.
Set Condition: If the PCM does not see the NVLD swtich close during test, an error is
detected. One Trip Fault.
POSSIBLE CAUSES
NVLD SWITCH OPERATION
(K107) NVLD SWITCH SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
(K107) NVLD SWITCH SIGNAL CIRCUIT SHORTED TO (K106) NVLD SOL CONTROL CIRCUIT
NVLD ASSEMBLY
(Z1) GROUND CIRCUIT OPEN
(K107) NVLD SWITCH SIGNAL CIRCUIT OPEN
PCM
TEST ACTION APPLICABILITY
1 Start the engine.
Allow the engine to idle.
Using the DRBIIIt, perform the NVLD FORCED MONITOR TEST.
Monitor the NVLD Switch state.
NOTE: As the test runs, the NVLD Switch should go from an OPEN state to
a CLOSED state and then return to OPEN when the test is complete.
Did the NVLD Switch operate as described above?
All
Yes → Refer to the INTERMITTENT CONDITION symptom in the
Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
No → Go To 2
2 Turn the ignition off.
Disconnect the NVLD electrical harness connector.
Ignition on, engine not running.
Measure the voltage on the (K107) NVLD Switch Signal circuit in the NVLD
electrical harness connector.
Is the voltage above 5.5 volts?
All
Yes → Repair short to battery voltage in the (K107)NVLD SwitchSignal
circuit.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
No → Go To 3
172
DRIVEABILITY - NGC
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