B2603
STEERING COLUMN: POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM: B2603: Tilt and Telescopic Manual Switch Circuit Malfunction
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.
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
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.
NG -- CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - HEADLIGHT DIMMER SWITCH)
OK -- Continue to next step.
2. CONFIRM DTC
(a) Clear the DTCs Power Tilt and Power Telescopic Steering Column System.
(b) Check for DTCs Power Tilt and Power Telescopic Steering Column System.
Result
B -- USE SIMULATION METHOD TO CHECK
A -- REPLACE MULTIPLEX TILT AND TELESCOPIC ECU
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:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
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:
NG -- REPLACE MULTIPLEX TILT AND TELESCOPIC ECU
OK -- Continue to next step.
5. INSPECT TILT AND TELESCOPIC MANUAL SWITCH
(a) Remove the tilt and telescopic manual switch Removal.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPLACE TILT AND TELESCOPIC MANUAL SWITCH
OK -- REPLACE HEADLIGHT DIMMER SWITCH