- Tilt and telescopic manual switch
- Tilt and telescopic manual switch circuit
- Multiplex tilt and telescopic ECU
| Last Modified: 11-27-2007 | 1.6 C | |
| Service Category: Steering | Section: Steering Column | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM0000012G500UX |
| Title: STEERING COLUMN: POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM: DESCRIPTION (2008 LX570) | ||
|
DTC |
B2603 |
Tilt and Telescopic Manual Switch Circuit Malfunction |
DESCRIPTION
Different voltage values are input to the multiplex tilt and telescopic ECU by operating the tilt and telescopic manual switch. The multiplex tilt and telescopic ECU then judges which motor and in which direction that motor should be moved based on the voltage value.
|
DTC Code |
Detection Condition |
Trouble Area |
|---|---|---|
|
B2603 |
When operating the tilt and telescopic manual switch, an abnormal voltage value is input to the multiplex tilt and telescopic ECU. |
|
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM (TILT AND TELESCOPIC MANUAL SWITCH) |
(a) Use the Data List to check if the tilt and telescopic manual switch is functioning properly.
Tilt & Telescopic
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Tilt Up Switch |
Input state of tilt up by manual switch/ON or OFF |
ON: Tilt up activated by manual switch OFF: Tilt up not activated by manual switch |
- |
|
Tilt Down Switch |
Input state of tilt down by manual switch/ON or OFF |
ON: Tilt down activated by manual switch OFF: Tilt down not activated by manual switch |
- |
|
Telesco Short Switch |
Input state of telescopic short by manual switch/ON or OFF |
ON: Telescopic short activated by manual switch OFF: Telescopic short not activated by manual switch |
- |
|
Telesco Long Switch |
Input state of telescopic long by manual switch/ON or OFF |
ON: Telescopic long activated by manual switch OFF: Telescopic long not activated by manual switch |
- |
OK:
"ON" is displayed on the Techstream screen when each switch is turned on.
"OFF" is displayed on the Techstream screen when each switch is turned off.
|
|
2. |
CONFIRM DTC |
(a) Clear the DTCs
.
(b) Check for DTCs
.
Result
|
Result |
Proceed to |
|---|---|
|
DTC is output |
A |
|
DTC is not output |
B |
|
|
3. |
CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - HEADLIGHT DIMMER SWITCH) |
(a) Disconnect the E27 multiplex tilt and telescopic ECU connector.
(b) Disconnect the E14 headlight dimmer switch connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
E27-4 (VC) - E14-8 (VC) |
Always |
Below 1 Ω |
|
E27-3 (MSW) - E14-10 (MSW) |
Always |
Below 1 Ω |
|
E14-8 (VC) - Body ground |
Always |
10 kΩ or higher |
|
E14-10 (MSW) - Body ground |
Always |
10 kΩ or higher |
|
|
4. |
CHECK MULTIPLEX TILT AND TELESCOPIC ECU (VC TERMINAL VOLTAGE) |
|
(a) Reconnect the E27 multiplex tilt and telescopic ECU connector. |
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
E27-4 (VC) - E27-3 (MSW) |
Engine switch on (IG) |
4.9 to 5.1 V |
|
|
5. |
INSPECT TILT AND TELESCOPIC MANUAL SWITCH |
|
(a) Remove the tilt and telescopic manual switch
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
1 (VC) - 3 (MSW) |
Tilt up |
342 to 378 Ω |
|
Tilt down |
1890.5 to 2089.5 Ω |
|
|
Telescopic contract |
750.5 to 829.5 Ω |
|
|
Telescopic extend |
152 to 168 Ω |
|
|
|