Toyota Tundra (2015 year). Manual — part 2776
A
1.
CHECK OTHER DTC OUTPUT
HINT:
The power tilt and power telescopic steering column system uses the CAN communication system, so check
its diagnostic system before proceeding to troubleshooting.
(a) Check if the power tilt and telescopic steering column system DTC B2621 is output.
Result
DTC CONDITION
PROCEED TO
B2621 is not output
A
B2621 is output
B
HINT:
If DTC B2621 is output, perform troubleshooting for B2621 first.
DTC B2621 indicates a communication interruption for the power tilt and power telescopic steering column
system.
B
REPAIR CIRCUIT INDICATED BY OUTPUT DTC
2.
READ VALUE USING TECHSTREAM (KEY SWITCH COMMUNICATION SIGNAL)
(a) Use the Data List to check if the key communication signal is functioning properly.
Tilt & Telescopic
TESTER
DISPLAY
MEASUREMENT ITEM/RANGE
NORMAL CONDITION
DIAGNOSTIC
NOTE
Key
Switch(CAN)
ON: Communication is
normal
OFF: Communication is
interrupted
-
Result
RESULT
PROCEED TO
"OFF" is displayed.
A
"ON" is displayed.
B
B
REPLACE MULTIPLEX TILT AND TELESCOPIC ECU
STEERING COLUMN: POWER TILT AND POWER TELESCOPIC ...
A
OK
3.
INSPECT UNLOCK WARNING SWITCH
(a) Disconnect the J18 connector from the unlock warning switch.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
TESTER CONNECTION
SWITCH CONDITION
SPECIFIED CONDITION
1 - 2
Unlock warning switch OFF (Ignition key is removed)
10 kΩ or higher
1 - 2
Unlock warning switch ON (Ignition key is inserted)
Below 1 Ω
NG
REPLACE UNLOCK WARNING SWITCH
4.
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - UNLOCK WARNING SWITCH)
STEERING COLUMN: POWER TILT AND POWER TELESCOPIC ...
OK
(a) Disconnect the J1 main body ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
J1-5 (KSW) - J18-1
Always
Below 1 Ω
J1-5 (KSW) - Body ground
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
5.
CHECK HARNESS AND CONNECTOR (UNLOCK WARNING SWITCH - BODY GROUND)
(a) Measure the resistance according to the value(s) in the table
below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
J18-2 - Body ground
Always
Below 1 Ω
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE MAIN BODY ECU
STEERING COLUMN: POWER TILT AND POWER TELESCOPIC ...
Last Modified: 9-16-2014
6.6 C
Doc ID: RM0000012G503LX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: STEERING COLUMN: POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM: B2603; Tilt and
Telescopic Manual Switch Circuit Malfunction; 2015 MY Tundra [08/2014 - ]
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, abnormal
voltage value is input to the multiplex tilt and telescopic ECU.
Tilt and telescopic
manual switch
Tilt and telescopic
manual switch circuit
Multiplex tilt and
telescopic ECU
WIRING DIAGRAM
STEERING COLUMN: POWER TILT AND POWER TELESCOPIC ...
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