DTC P0506
DTC P0506 : Idle Control System RPM Lower Than Expected
| DTC Description | Confirmed DTC | Pending DTC | Freeze Frame |
|---|---|---|---|
| P0506 Idle Control System RPM Lower Than Expected |
DTC (PGM-FI)
- Problem verification
-1. Turn the vehicle to the ON mode.
-2. Clear the DTC with the HDS .
-3. Start the engine. Hold the engine speed at 3000 RPM without load (in P or N) until the radiator fan comes on, then let it idle at least 20 seconds.
-4. Check for these conditions in the DATA LIST with the HDS.
- Engine coolant temperature (ECT SENSOR 1) above 158 deg.F (70 deg.C)
- IAT SENSOR above 32 deg.F (0 deg.C)
- VEHICLE SPEED is 0 mph (0 km/h)
- ST FUEL TRIM B1 between 0.80 and 1.33
- ST FUEL TRIM B2 between 0.80 and 1.33
- FSS-B1 is CLOSED
- FSS-B2 is CLOSED
Signal Current conditions Values Unit ECT SENSOR 1 IAT SENSOR (2) VEHICLE SPEED ST FUEL TRIM B1 ST FUEL TRIM B2 FSS B1 FSS B2 -5. Monitor the OBD STATUS for DTC P0506 in the DTCs MENU with the HDS.
DTC Description OBD STATUS P0506 Idle Control System RPM Lower Than Expected Does the HDS indicate FAILED?
YES
The failure is duplicated. Go to step 2.
NO
If the HDS indicates PASSED, go to step 3. If the HDS indicates EXECUTING, keep idling until a result comes on. If the HDS indicates OUT OF CONDITION, go to step 1-4 and recheck.
- Throttle body visual check
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Remove the intake air duct from the throttle body .
-3. Check for dirt, carbon, or damage in the throttle bore.
Is there dirt, carbon, or damage in the throttle bore?
YES
If there is dirt or carbon, clean the throttle body . Also check for damage to the air cleaner element, then do the repair verification. If there is damage in the throttle bore, replace the throttle body , then do the repair verification.
NO
The throttle body is OK. Check the A/C system, then go to step 4.
- Throttle body visual check
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Remove the intake air duct from the throttle body .
-3. Check for dirt, carbon, or damage in the throttle bore.
Is there dirt, carbon, or damage in the throttle bore?
YES
If there is dirt or carbon, clean the throttle body . Also check for damage to the air cleaner element, then do the repair verification. If there is damage in the throttle bore, replace the throttle body , then do the repair verification.
NO
The throttle body is OK. Go to step 4.
- Idle control system check
-1. Turn the vehicle to the ON mode.
-2. Clear the DTC with the HDS.
-3. Start the engine. Hold the engine speed at 3000 RPM without load (in P or N) until the radiator fan comes on, then let it idle at least 20 seconds.
-4. Check for these conditions in the DATA LIST with the HDS.
- Engine coolant temperature (ECT SENSOR 1) above 158 deg.F (70 deg.C)
- IAT SENSOR above 32 deg.F (0 deg.C)
- VEHICLE SPEED is 0 mph (0 km/h)
- ST FUEL TRIM B1 between 0.80 and 1.33
- ST FUEL TRIM B2 between 0.80 and 1.33
- FSS-B1 is CLOSED
- FSS-B2 is CLOSED
Signal Current conditions Values Unit ECT SENSOR 1 IAT SENSOR (2) VEHICLE SPEED ST FUEL TRIM B1 ST FUEL TRIM B2 FSS B1 FSS B2 -5. Monitor the OBD STATUS for DTC P0506 in the DTCs MENU with the HDS.
DTC Description OBD STATUS P0506 Idle Control System RPM Lower Than Expected Does the HDS indicate PASSED?
YES
Intermittent failure, the system is OK at this time.
NO
If the HDS indicates FAILED, check the A/C system, then go to step 1 and recheck. If the HDS indicates EXECUTING, keep idling until a result comes on. If the HDS indicates OUT OF CONDITION, go to step 1.
- Repair verification (OBD STATUS check)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Reconnect all connectors.
-3. Turn the vehicle to the ON mode.
-4. Reset the PCM with the HDS .
Reset PCM
-5. Do the PCM idle learn procedure .
-6. Start the engine. Hold the engine speed at 3000 RPM without load (in P or N) until the radiator fan comes on, then let it idle at least 20 seconds.
-7. Check for these conditions in the DATA LIST with the HDS.
- Engine coolant temperature (ECT SENSOR 1) above 158 deg.F (70 deg.C)
- IAT SENSOR above 32 deg.F (0 deg.C)
- VEHICLE SPEED is 0 mph (0 km/h)
- ST FUEL TRIM B1 between 0.80 and 1.33
- ST FUEL TRIM B2 between 0.80 and 1.33
- FSS-B1 is CLOSED
- FSS-B2 is CLOSED
Signal Current conditions Values Unit ECT SENSOR 1 IAT SENSOR (2) VEHICLE SPEED ST FUEL TRIM B1 ST FUEL TRIM B2 FSS B1 FSS B2 -8. Monitor the OBD STATUS for DTC P0506 in the DTCs MENU with the HDS.
DTC Description OBD STATUS P0506 Idle Control System RPM Lower Than Expected DTC (PGM-FI)
Does the HDS indicate PASSED, FAILED, EXECUTING, or OUT OF CONDITION?
PASSED
Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated, go to the indicated DTC's troubleshooting.
FAILED
Go to step 1 and recheck.
EXECUTING
Keep idling until a result comes on.
OUT OF CONDITION
Meet the test conditions, and check the OBD STATUS again.