Lexus NX manuals

Lexus NX: Test Mode Procedure

Lexus NX Service Manual / Suspension / Suspension Control / Adaptive Variable Suspension System / Test Mode Procedure

TEST MODE PROCEDURE

TEST MODE PROCEDURE

NOTICE:

  • After replacing the absorber control ECU, it is necessary to perform registration of vehicle identification information. Vehicle identification information is automatically acquired when the system enters test mode.
  • When vehicle identification information has not been acquired, the "SPORT S+" indicator in the multi-information display blinks at 1-second intervals (1 second on and 1 second off). After vehicle identification information is acquired, the "SPORT S+" indicator in the multi-information display blinks at 0.125-second intervals (0.125 seconds on and 0.125 seconds off).

HINT:

  • When entering test mode, the absorber control ECU stores all the test mode DTCs first.

    After completing the check for each test mode item, the test mode DTCs whose deletion conditions are met are cleared.

    The test mode DTCs for some items may not be cleared when only a certain signal is inspected.

  • When the system returns to normal mode, all the test mode DTCs will be cleared.

(a) Turn the power switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the power switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Chassis / Air suspension / Utility / Signal Check.

Chassis > Air suspension > Utility

Tester Display

Signal Check

(f) Confirm that the system is in test mode by checking that the "SPORT S+" indicator in the multi-information display blinks at 0.125-second intervals (0.125 seconds on and 0.125 seconds off).

(g) With the vehicle stationary on a level surface, wait for 1 second or more.

(h) Read the test mode DTCs by following the prompts on the Techstream screen.

(i) End test mode by following the prompts on the Techstream screen.

(j) Enter the following menus: Chassis / Air suspension / Data List.

Chassis > Air suspension > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Stop and Start Learning Status

Learning status of stop and start setting availability after vehicle identification information registration is performed

Unset, OFF or ON

OFF

When "Unset", DTC C1789 is output.
Chassis > Air suspension > Data List

Tester Display

Stop and Start Learning Status

(k) Check the value displayed on the Techstream.

OK:

The display is as specified in the normal condition column.

(l) Turn the power switch off and disconnect the Techstream from the DLC3.

TEST MODE DTC CHART

HINT:

When entering test mode, the absorber control ECU stores all the test mode DTCs. If the deletion conditions for a test mode DTC are met, it is cleared.

(a) If a trouble code is output during the test mode DTC check, check the circuit listed for that code. For details of each code, refer to Link for the respective DTC in the chart.

DTC Code

Detection Item

Trouble Area

Deletion Condition

Link

C1796

Front acceleration sensor RH circuit malfunction
  • Front acceleration sensor assembly RH
  • Front acceleration sensor assembly RH circuit
  • Absorber control ECU

With the vehicle stationary on a level surface, an acceleration sensor value that is within -1.96 to 1.96 m/s2 is received from the acceleration sensor for 1 second or more.

C1797

Front acceleration sensor LH circuit malfunction
  • Front acceleration sensor assembly LH
  • Front acceleration sensor assembly LH circuit
  • Absorber control ECU

C1798

Rear acceleration sensor circuit malfunction

Absorber control ECU (built into rear acceleration sensor)

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