Dtc 052 Safety Time Exceeded
Heater. Lexus Is250, Is220D. Gse20 Ale20
DESCRIPTION
INSPECTION PROCEDURE
INSPECT INTAKE AIR DUCT
INSPECT EXHAUST AIR DUCT
INSPECT HEATER FUEL PUMP
REPLACE FUEL PUMP FILTER
DTC 052 Safety Time Exceeded |
DESCRIPTION
DTC No.
| DTC Detection Condition
| Trouble Area
|
052
| A heater ignition failure is detected.
| - Exhaust air duct
- Intake air duct
- Fuel pump filter
- Heater fuel pump
- Combustion heater assembly
|
INSPECTION PROCEDURE
| 1.INSPECT INTAKE AIR DUCT |
Inspect the intake air duct.
- Result:
Result
| Proceed to
|
There is no problem with the intake air duct.
| A
|
The intake air duct is clogged, or other problems are found.
| B
|
| | CLEAN OR REPLACE INTAKE AIR DUCT |
|
|
| 2.INSPECT EXHAUST AIR DUCT |
Inspect the exhaust air duct.
- Result:
Result
| Proceed to
|
There is no problem with the exhaust air duct.
| A
|
The exhaust air duct is clogged, or other problems are found.
| B
|
| | CLEAN OR REPLACE EXHAUST AIR DUCT |
|
|
| 3.INSPECT HEATER FUEL PUMP |
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester connection
| Condition
| Specified condition
|
Q55-2 - Q55-1
| Always
| 9 to 12 Ω
|
Inspect heater fuel pump operation.
Connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead to terminal 1, and check the pressure of the hose by hand.
- NOTICE:
- This inspection must be done quickly (within 10 seconds) to prevent damage to the heater fuel pump.
- OK:
- The pressure is applied to the hose.
| 4.REPLACE FUEL PUMP FILTER |
Replace the fuel pump filter with a normal one and check that the condition returns to normal.
- OK:
- The heater is ignited normally and it starts operating.
| NG |
|
|
|
| REPLACE COMBUSTION HEATER ASSEMBLY |
|
