- Engine not running
- 30 seconds after power switch turned on (IG)
Lexus NX: Mass Air Flow Meter
Components
COMPONENTS
ILLUSTRATION
| *1 | MASS AIR FLOW METER SUB-ASSEMBLY | - | - |
On-vehicle Inspection
ON-VEHICLE INSPECTION
CAUTION / NOTICE / HINT
NOTICE:
- Perform the mass air flow meter sub-assembly inspection according to the procedures below.
- Only replace the mass air flow meter sub-assembly when the mass air flow value in the Data List (with the engine stopped) is not within the normal operating range or there is foreign matter on the mass air flow meter platinum hot wire (heater).
PROCEDURE
1. INSPECT MASS AIR FLOW METER SUB-ASSEMBLY
NOTICE:
- Perform the inspection with the vehicle indoors and on a level surface.
- Perform the inspection of the mass air flow meter sub-assembly while it is installed to the air cleaner cap sub-assembly (installed to the vehicle).
- During the test, do not use an exhaust air duct on the exhaust pipe.
HINT:
Perform "Inspection After Repairs" after replacing the mass air flow meter sub-assembly.
Click here .gif)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG) (do not run the engine).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Data List / MAF.
Powertrain > Engine and ECT > Data List| Tester Display |
|---|
| MAF |
(e) Wait 30 seconds, and then read the values on the Techstream.
Standard:
| Item | Condition | Specified Condition |
|---|---|---|
| MAF | | 0.58 gm/sec or less |
If the result is not as specified, replace the mass air flow meter sub-assembly.
If the result is as specified, inspect the mass air flow meter sub-assembly.
Click here
Removal
REMOVAL
PROCEDURE
1. REMOVE MASS AIR FLOW METER SUB-ASSEMBLY
| (a) Disconnect the mass air flow meter sub-assembly connector. |
|
(b) Remove the 2 screws and mass air flow meter sub-assembly.
Inspection
INSPECTION
PROCEDURE
1. INSPECT MASS AIR FLOW METER SUB-ASSEMBLY
| (a) Perform a visual check for any foreign matter on the platinum hot wire (heater) of the mass air flow meter sub-assembly as shown in the illustration. OK: There is no foreign matter. |
|
(b) Check the intake air temperature sensor (built into the mass air flow meter sub-assembly).
| (1) Measure the resistance according to the value(s) in the table below. Standard Resistance:
If the result is not as specified, replace the mass air flow meter sub-assembly. |
|
Installation
INSTALLATION
CAUTION / NOTICE / HINT
HINT:
Perform "Inspection After Repairs" after replacing the mass air flow meter sub-assembly.
Click here .gif)
PROCEDURE
1. INSTALL MASS AIR FLOW METER SUB-ASSEMBLY
HINT:
Perform "Inspection After Repairs" after replacing the mass air flow meter sub-assembly.
Click here
(a) Install the mass air flow meter sub-assembly with the 2 screws.
(b) Connect the mass air flow meter sub-assembly connector.
READ NEXT:
Relay
On-vehicle InspectionON-VEHICLE INSPECTION PROCEDURE 1. INSPECT JUNCTION BLOCK *1 Main Body ECU - - *a Component without harness connected (Junction Block) *b Component without ma
Precaution
PRECAUTION INITIALIZATION NOTICE: Perform Registration (VIN registration) when replacing the ECM. Click here DISCONNECT CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL NOTICE:
After the power swit
SEE MORE:
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT: Use the following procedure to troubleshoot the wireless charging system. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
NEXT 2. CUSTOMER PROBLEM ANALYSIS
NEXT 3. INSPECT AUXILIARY BATTERY VOLTAGE (a) Measure the au
CAN Communication Failure (Message Registry) (U1000)
DESCRIPTION This DTC is output when an internal malfunction of the CAN communication-related ECU is stored. DTC No. Detection Item DTC Detection Condition Trouble Area U1000 CAN Communication Failure (Message Registry) A headlight ECU sub-assembly LH CAN communication function malfu
© 2016-2024 Copyright www.lexunx.com
