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Last Modified: 11-27-2007 1.6 C
Service Category: Vehicle Exterior Section: Lighting (ext)
Model Year: 2008 Model: LX570 Doc ID: RM0000011SX00VX
Title: LIGHTING (EXT): LIGHTING SYSTEM: DESCRIPTION (2008 LX570)

DTC

B2416

Height Control Sensor Malfunction

DESCRIPTION

The AFS ECU receives signals indicating the height of the vehicle from the suspension control ECU.

DTC Code

DTC Detection Condition

Trouble Area

B2416

When either condition below is met:

  • Malfunction in the suspension control ECU.
  • Open or short in the suspension control ECU circuit.
  • Suspension control ECU
  • Harness or connector
  • AFS ECU

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.

CHECK FOR DTC

(a) Clear the DTCs LIGHTING (EXT): LIGHTING SYSTEM: DTC CHECK / CLEAR (2008 LX570) .

(b) Check for DTCs LIGHTING (EXT): LIGHTING SYSTEM: DTC CHECK / CLEAR (2008 LX570) .

OK:

DTC B2416 output does not occur.

OK

3.

CHECK FOR DTC (AIR SUSPENSION SYSTEM)

(a) Check for DTCs SUSPENSION CONTROL: ACTIVE HEIGHT CONTROL SUSPENSION: DTC CHECK / CLEAR (2008 LX570) .

OK:

DTC "C1712/12 Front Height Control Sensor LH Circuit Malfunction" and "C1714/14 Rear Height Control Sensor LH Circuit Malfunction" output does not occur.

OK

4.

READ VALUE USING TECHSTREAM (AFS ECU)

(a) Using the Techstream, read the Data List.

AFS

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Height Sens Pw Supply Val

Height control sensor power supply value / Min.: 0 V, Max.: 5 V

Power supply voltage to height control sensor

-

Fr Height Sens Signal Val

Front height control sensor signal / Min.: 0 V, Max.: 5 V

Height control sensor vehicle height value

-

Rr Height Sens Signal Val

Rear height control sensor signal / Min.: 0 V, Max.: 5 V

Height control sensor vehicle height value

-

OK:

Power supply voltage is approximately 5 V and height control sensor voltage changes when vehicle height is changed.

OK

5.

CHECK HARNESS AND CONNECTOR (AFS ECU - SUSPENSION CONTROL ECU)

(a) Disconnect the E91, K31 and K32 ECU connectors.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

E91-17 (SHFL) - K31-22 (SHF2)

Always

Below 1 Ω

E91-18 (SBR) - K31-23 (SHB5)

E91-19 (SHRL) - K32-28 (SHR2)

E91-21 (SGR) - K31-11 (SHG5)

E91-17 (SHFL) - Body ground

Always

10 kΩ or higher

E91-18 (SBR) - Body ground

E91-19 (SHRL) - Body ground

E91-21 (SGR) - Body ground
OK

6.

CHECK SUSPENSION CONTROL ECU

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

K31-23 (SHB5) - K31-11 (SHG5)

Engine switch on (IG)

4.5 to 5.5 V

K31-22 (SHF2) - K31-11 (SHG5)

While engine running, height control switch changed from HIGH to NORM, and vehicle height adjustment finished

2.20 to 2.80 V

K32-28 (SHR2) - K31-11 (SHG5)

While engine running, height control switch changed from HIGH to NORM, and vehicle height adjustment finished

2.21 to 2.80 V

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

K31-11 (SHGS) - Body ground

Always

Below 1 Ω
OK