- Unlock warning switch signal is OFF.
- Ignition switch is turned ON.
| Last Modified: 11-29-2007 | 1.6 C | |
| Service Category: Steering | Section: Steering Column | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM0000013VT00BX |
| Title: STEERING COLUMN: POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM: DESCRIPTION (2008 Sequoia) | ||
|
DTC |
B2602 |
Key Unlock Warning Switch Circuit Malfunction |
DESCRIPTION
A signal (ON or OFF) is sent from the main body ECU to the multiplex tilt and telescopic ECU via the CAN communication bus when the ignition key is inserted into the key cylinder. The multiplex tilt and telescopic ECU uses this signal to operate the auto away or auto return function.
|
DTC Code |
Detection Condition |
Trouble Area |
|---|---|---|
|
B2602 |
When both conditions below are met: |
|
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
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
|
Result |
Proceed to |
|---|---|
|
No output |
A |
|
B2621 is output |
B |
HINT:
- If DTC B2621 and B2602 are output, perform troubleshooting for B2621 first.
- DTC B2621 indicates a communication interruption for the power tilt and power telescopic steering column system.
|
|
2. |
READ VALUE USING TECHSTREAM (UNLOCK WARNING SWITCH COMMUNICATION SIGNAL) |
(a) Use the Data List to check if the unlock warning communication signal is functioning properly.
Tilt & Telescopic
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Key SW (CAN) |
Communication state of unlock warning switch/ON or OFF |
ON: Communication is normal OFF: Communication is interrupted |
- |
Result
|
Result |
Proceed to |
|---|---|
|
"OFF" is displayed. |
A |
|
"ON" is displayed. |
B |
|
|
3. |
INSPECT UNLOCK WARNING SWITCH |
(a) Disconnect the H21 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 |
|
|
4. |
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - UNLOCK WARNING SWITCH) |
(a) Disconnect the H1 main body ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
H1-5 (KSW) - H21-1 |
Always |
Below 1 Ω |
|
H1-5 (KSW) - Body ground |
Always |
10 kΩ or higher |
|
|
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:
|
|
|
|