P0498
P0498-NVLD CANISTER VENT VALVE SOLENOID CIRCUIT LOWP0498-NVLD Canister Vent Valve Solenoid Circuit Low:
WHEN MONITORED
Engine running.
SET CONDITION
The PCM detects a short in the NVLD Canister vent solenoid circuits. One Trip Fault. Three good trips to turn off the MIL.
POSSIBLE CAUSES
- (K106) NVLD Solenoid control circuit shorted to ground
- NVLD Assembly
- PCM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.
DIAGNOSTIC TEST
1. ACTIVE DTC
Ignition on, engine not running.
With a scan tool, read DTCs.
Q: Is the DTC active at this time?
YES: Go To 2
NO: Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test
2. NVLD SOLENOID
Turn the ignition off.
Disconnect the NVLD electrical harness connector.
Measure the resistance of the NVLD Solenoid Coil.
Q: Is the resistance between 7.5 to 8.5 ohms?
YES: Go To 3
NO: Replace the NVLD Assembly. Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test
3. (K106) NVLD SOLENOID CONTROL CIRCUIT SHORTED TO GROUND
Disconnect the C3 PCM harness connector.
Measure the resistance between ground and the (K106) NVLD Solenoid Control circuit in the NVLD electrical harness connector.
Q: Is the resistance below 100 ohms?
YES: Repair the short to ground in the (K106) NVLD Solenoid Control circuit. Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test
NO: Go To 4
4. PCM
NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.
Q: Were there any problems found?
YES: Repair as necessary. Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test
NO: Replace and program the Powertrain Control Module per Service Information. Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test