- Inspection of ignition timing etc. when performing engine maintenance, idle speed exhaust emissions testing (CO, HC), etc.
- Tests using a speedometer tester, two-wheel chassis dynamometer, etc.
Lexus NX: Inspection Mode Procedure
INSPECTION MODE PROCEDURE
NOTICE:
When operating the vehicle in inspection mode for an operation such as a speedometer test, a DTC may be set. Therefore, if the warning light comes on, after canceling inspection mode, check for DTCs using the Techstream and clear the DTCs.
HINT:
- If the engine is warmed up and the HV battery is charged, the engine will stop after the vehicle stops. If the engine is required to run continuously even after the vehicle stops, such as for an ignition timing check, switch to maintenance mode.
- The vehicle is equipped with the AWD system by which the rear wheels are electronically controlled by the motor, VSC system and TRAC system. Therefore, it is necessary to switch to the 2WD inspection mode and cancel all of these systems when only the front wheels are required to be rotated on a chassis dynamometer.
INSPECTION MODE
(a) The following table shows the types of inspection mode that are available, their purpose and the control that occurs in each mode.
| Mode (Display) | Purpose | Control |
|---|---|---|
| 2WD MAINTENANCE MODE (2WD for measuring Exhaust Gas) | |
|
| 2WD CERTIFICATION MODE (2WD for cutting TRC) | Tests using a speedometer tester, two-wheel chassis dynamometer, etc. |
|
| AWD MAINTENANCE MODE (4WD for measuring Exhaust Gas) |
|
|
| AWD CERTIFICATION MODE (4WD for cutting TRC) | Tests using a four-wheel chassis dynamometer, etc. | Cancels traction control |
(b) Vehicle conditions
(1) Before activating inspection mode, turn the air conditioning off, start the hybrid system with the shift lever in P, and check that the engine stops within several seconds after starting (engine warm up check).
(2) Activate the appropriate inspection mode and inspect the vehicle:
| Test Item | Mode |
|---|---|
| 1. Vehicle straight traveling test (side slip inspection) | 2WD maintenance mode, AWD maintenance mode or normal mode |
| 2. Braking force test | Normal mode |
| 3. Speedometer test | 2WD maintenance mode |
| 4. Exhaust gas test (idling) | 2WD maintenance mode or AWD maintenance mode |
| 5. Headlight test | 2WD maintenance mode, AWD maintenance mode or normal mode |
(3) Cancel inspection mode immediately after completion of inspection.
NOTICE:
Driving the vehicle without canceling inspection mode may damage the transmission.
(c) Special notes for speedometer test
CAUTION:
Be sure to perform the test in 2WD maintenance mode.
NOTICE:
Do not perform rapid starting or quick acceleration on a speedometer tester. If rapid starting or quick acceleration is performed on a speedometer tester, damage may occur to the transaxle.
(1) Depress the accelerator pedal slowly and gradually accelerate the vehicle. Make a measurement.
(2) After the measurement, use the brakes to gradually decelerate the vehicle.
(d) Special notes for using a chassis dynamometer
NOTICE:
Sudden acceleration or deceleration of the vehicle on a chassis dynamometer under minimal load may damage the transmission.
(1) Always set an appropriate load before starting the test.
(e) Activating 2WD maintenance mode (Not using the Techstream)
(1) Perform steps (A) through (D) in 60 seconds.
- Turn the power switch on (IG). (Step A)
- Fully depress the accelerator pedal twice with the shift lever in P. (Step B)
- Fully depress the accelerator pedal twice with the shift lever in N. (Step C)
- Fully depress the accelerator pedal twice with the shift lever in P. (Step D)
(2) Check that "2WD MAINTENANCE MODE" is displayed on the multi-information display.
(3) Start the engine by turning the power switch on (READY) while depressing the brake pedal.
HINT:
The idle speed in maintenance mode is approximately 900 rpm with the shift lever in P. The engine speed increases to 1500 rpm when the accelerator pedal is depressed midway with the shift lever in P. When the accelerator pedal is depressed more than midway, or when the accelerator pedal is fully depressed, the engine speed increases to approximately 2500 rpm.
(f) Activating 2WD maintenance mode (Using the Techstream)
(1) Connect the Techstream to the DLC3.
(2) Turn the power switch on (IG).
(3) Turn the Techstream on.
(4) Enter following menus: Powertrain / Hybrid Control / Utility / Inspection Mode - 2WD for measuring Exhaust Gas.
Powertrain > Hybrid Control > Utility| Tester Display |
|---|
| Inspection Mode |
(5) Check that "2WD MAINTENANCE MODE" is displayed on the multi-information display.
(6) Start the engine by turning the power switch on (READY) while depressing the brake pedal.
HINT:
The idle speed in maintenance mode is approximately 900 rpm with the shift lever in P. The engine speed increases to 1500 rpm when the accelerator pedal is depressed midway with the shift lever in P. When the accelerator pedal is depressed more than midway, or when the accelerator pedal is fully depressed, the engine speed increases to approximately 2500 rpm.
(g) Activating 2WD certification mode (Not using the Techstream)
(1) Perform steps (A) through (D) in 60 seconds.
- Turn the power switch on (IG). (Step A)
- Fully depress the accelerator pedal 3 times with the shift lever in P. (Step B)
- Fully depress the accelerator pedal 3 times with the shift lever in N. (Step C)
- Fully depress the accelerator pedal 3 times with the shift lever in P. (Step D)
(2) Check that "2WD CERTIFICATION MODE" is displayed on the multi-information display.
(3) Start the engine by turning the power switch on (READY) while depressing the brake pedal.
(h) Activating 2WD certification mode (Using the Techstream)
(1) Connect the Techstream to the DLC3.
(2) Turn the power switch on (IG).
(3) Turn the Techstream on.
(4) Enter following menus: Powertrain / Hybrid Control / Utility / Inspection Mode - 2WD for cutting TRC.
Powertrain > Hybrid Control > Utility| Tester Display |
|---|
| Inspection Mode |
(5) Check that "2WD CERTIFICATION MODE" is displayed on the multi-information display.
(6) Start the engine by turning the power switch on (READY) while depressing the brake pedal.
(i) Activating AWD maintenance mode (Not using the Techstream)
(1) Perform steps (A) through (D) in 60 seconds.
- Turn the power switch on (IG). (Step A)
- Fully depress the accelerator pedal 4 times with the shift lever in P. (Step B)
- Fully depress the accelerator pedal 4 times with the shift lever in N. (Step C)
- Fully depress the accelerator pedal 4 times with the shift lever in P. (Step D)
(2) Check that "AWD MAINTENANCE MODE" is displayed on the multi-information display.
(3) Start the engine by turning the power switch on (READY) while depressing the brake pedal.
HINT:
The idle speed in maintenance mode is approximately 900 rpm with the shift lever in P. The engine speed increases to 1500 rpm when the accelerator pedal is depressed midway with the shift lever in P. When the accelerator pedal is depressed more than midway, or when the accelerator pedal is fully depressed, the engine speed increases to approximately 2500 rpm.
(j) Activating AWD maintenance mode (Using the Techstream)
(1) Connect the Techstream to the DLC3.
(2) Turn the power switch on (IG).
(3) Turn the Techstream on.
(4) Enter following menus: Powertrain / Hybrid Control / Utility / Inspection Mode - 4WD for measuring Exhaust Gas.
Powertrain > Hybrid Control > Utility| Tester Display |
|---|
| Inspection Mode |
(5) Check that "AWD MAINTENANCE MODE" is displayed on the multi-information display.
(6) Start the engine by turning the power switch on (READY) while depressing the brake pedal.
HINT:
The idle speed in maintenance mode is approximately 900 rpm with the shift lever in P. The engine speed increases to 1500 rpm when the accelerator pedal is depressed midway with the shift lever in P. When the accelerator pedal is depressed more than midway, or when the accelerator pedal is fully depressed, the engine speed increases to approximately 2500 rpm.
(k) Activating AWD certification mode (Not using the Techstream)
(1) Perform steps (A) through (D) in 60 seconds.
- Turn the power switch on (IG). (Step A)
- Fully depress the accelerator pedal 5 times with the shift lever in P. (Step B)
- Fully depress the accelerator pedal 5 times with the shift lever in N. (Step C)
- Fully depress the accelerator pedal 5 times with the shift lever in P. (Step D)
(2) Check that "AWD CERTIFICATION MODE" is displayed on the multi-information display.
(3) Start the engine by turning the power switch on (READY) while depressing the brake pedal.
(l) Activating AWD certification mode (Using the Techstream)
(1) Connect the Techstream to the DLC3.
(2) Turn the power switch on (IG).
(3) Turn the Techstream on.
(4) Enter following menus: Powertrain / Hybrid Control / Utility / Inspection Mode - 4WD for cutting TRC.
Powertrain > Hybrid Control > Utility| Tester Display |
|---|
| Inspection Mode |
(5) Check that "AWD CERTIFICATION MODE" is displayed on the multi-information display.
(6) Start the engine by turning the power switch on (READY) while depressing the brake pedal.
(m) Deactivating inspection mode
(1) Turn the power switch off. The hybrid system will turn off simultaneously.
NOTICE:
- If a DTC is set during inspection mode, the master warning light will illuminate and a warning message will appear on the multi-information display.
- If the master warning light and the warning message illuminate during inspection mode, cancel inspection mode, and check for DTCs.
- Driving the vehicle without canceling inspection mode may damage the transaxle.
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