NAVIGATION SYSTEM Steering Pad Switch Circuit
| DTC Code | DTC Name |
|---|---|
| Steering Pad Switch Circuit |
DESCRIPTION
This circuit sends an operation signal from the steering pad switch assembly to the radio and display receiver assembly.
If there is an open in the circuit, the audio system cannot be operated using the steering pad switch assembly.
If there is a short in the circuit, the same condition as when a switch is continuously depressed occurs.
Therefore, the radio and display receiver assembly cannot be operated using the steering pad switch assembly, and also the radio and display receiver assembly itself cannot function.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
The vehicle is equipped with a Supplemental Restraint System (SRS) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the precaution for Supplemental Restraint System.
PROCEDURE
CHECK HARNESS AND CONNECTOR (STEERING PAD SWITCH SIGNAL)
Disconnect the E60 radio and display receiver assembly connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance
Table 1. for Sedan Tester Connection
Condition
Specified Condition
E60-21 (SW1) - E60-23 (SWG)
No switch pushed
95 to 105 kΩ
Up switch pushed
Below 2.5 Ω
Down switch pushed
313 to 345 Ω
Volume+ switch pushed
950 to 1050 Ω
Volume- switch pushed
2955 to 3265 Ω
E60-22 (SW2) - E60-23 (SWG)
No switch pushed
95 to 105 kΩ
MODE/HOLD switch pushed
Below 2.5 Ω
On hook switch pushed
313 to 345 Ω
Off hook switch pushed
950 to 1050 Ω
Voice switch pushed*
2955 to 3265 Ω
E60-24 (SW3) - E60-23 (SWG)
No switch pushed
95 to 105 kΩ
Enter switch pushed
Below 2.5 Ω
Back switch pushed
313 to 345 Ω
Right switch pushed
950 to 1050 Ω
Left switch pushed
2955 to 3265 Ω
Table 2. for Hatchback, Wagon Tester Connection
Condition
Specified Condition
E60-21 (SW1) - E60-23 (SWG)
No switch pushed
95 to 105 kΩ
Seek+ switch pushed
Below 2.5 Ω
Seek- switch pushed
313 to 345 Ω
Volume+ switch pushed
950 to 1050 Ω
Volume- switch pushed
2955 to 3265 Ω
E60-22 (SW2) - E60-23 (SWG)
No switch pushed
95 to 105 kΩ
MODE switch pushed
Below 2.5 Ω
On hook switch pushed
313 to 345 Ω
Off hook switch pushed
950 to 1050 Ω
Voice switch pushed
2955 to 3265 Ω
*: w/ Voice Switch
Result
Proceed to
OK
NG
INSPECT STEERING PAD SWITCH ASSEMBLY
Remove the steering pad switch assembly.
Measure the resistance according to the value(s) in the table below.(for Sedan)
*A
w/ Voice Switch
-
-
*a
Component without harness connected
(Steering Pad Switch Assembly)
*b
Volume+
*c
Volume-
*d
Back
*e
MODE/HOLD
*f
Up
*g
Down
*h
Left
*i
Right
*j
Enter
*k
Off hook
*l
On hook
*m
Voice
-
-
Standard Resistance
Tester Connection
Condition
Specified Condition
11 (AU1) - 8 (EAU)
No switch pushed
95 to 105 kΩ
Up switch pushed
Below 2.5 Ω
Down switch pushed
313 to 345 Ω
Volume+ switch pushed
950 to 1050 Ω
Volume- switch pushed
2955 to 3265 Ω
10 (AU2) - 8 (EAU)
No switch pushed
95 to 105 kΩ
MODE/HOLD switch pushed
Below 2.5 Ω
On hook switch pushed
313 to 345 Ω
Off hook switch pushed
950 to 1050 Ω
Voice switch pushed*
2955 to 3265 Ω
9 (AU3) - 8 (EAU)
No switch pushed
95 to 105 kΩ
Enter switch pushed
Below 2.5 Ω
Back switch pushed
313 to 345 Ω
Right switch pushed
950 to 1050 Ω
Left switch pushed
2955 to 3265 Ω
*: w/ Voice Switch
Measure the resistance according to the value(s) in the table below.(for Hatchback, Wagon)
*a
Component without harness connected
(Steering Pad Switch Assembly)
*b
Volume+
*c
Volume-
*d
Seek+
*e
Seek-
*f
MODE
*g
Off hook
*h
On hook
*i
Voice
-
-
Standard Resistance
Tester Connection
Condition
Specified Condition
11 (AU1) - 8 (EAU)
No switch pushed
95 to 105 kΩ
Seek+ switch pushed
Below 2.5 Ω
Seek- switch pushed
313 to 345 Ω
Volume+ switch pushed
950 to 1050 Ω
Volume- switch pushed
2955 to 3265 Ω
10 (AU2) - 8 (EAU)
No switch pushed
95 to 105 kΩ
MODE switch pushed
Below 2.5 Ω
On hook switch pushed
313 to 345 Ω
Off hook switch pushed
950 to 1050 Ω
Voice switch pushed
2955 to 3265 Ω
Result
Result
Proceed to
OK (w/ VSC)
A
OK (w/o VSC)
B
NG
C
INSPECT SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY
Remove the spiral cable with sensor sub-assembly.
-
*A
for Sedan
*a
Component without harness connected
(Spiral Cable with Sensor Sub-assembly)
*b
Steering Pad Switch Assembly Side
*c
Vehicle Side
Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection
Condition
Specified Condition
z1-8 (EAU) - E6-3 (EAU)
Center
3 Ω or less
2.5 rotations to the left
2.5 rotations to the right
z1-11 (AU1) - E6-6 (AU1)
Center
3 Ω or less
2.5 rotations to the left
2.5 rotations to the right
z1-10 (AU2) - E6-5 (AU2)
Center
3 Ω or less
2.5 rotations to the left
2.5 rotations to the right
z1-9 (AU3) - E6-4 (AU3)*
Center
3 Ω or less
2.5 rotations to the left
2.5 rotations to the right
*: for Sedan
After setting the spiral cable with sensor sub-assembly to the center position, rotate the spiral cable with sensor sub-assembly 2.5 times clockwise. Then while rotating the spiral cable with sensor sub-assembly 5 times counterclockwise, measure the resistance according to the table below.
Standard Resistance
Tester Connection
Condition
Specified Condition
z1-8 (EAU) - E6-3 (EAU)
Always
3 Ω or less
z1-11 (AU1) - E6-6 (AU1)
Always
3 Ω or less
z1-10 (AU2) - E6-5 (AU2)
Always
3 Ω or less
z1-9 (AU3) - E6-4 (AU3)*
Always
3 Ω or less
*: for Sedan
Note:Press and hold the lock located in the center of the spiral cable with sensor sub-assembly to rotate the spiral cable with sensor sub-assembly.
The spiral cable with sensor sub-assembly is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable with sensor sub-assembly may prevent the airbag from deploying.
As the spiral cable with sensor sub-assembly may break, do not rotate the spiral cable with sensor sub-assembly more than the specified amount.
Result
Proceed to
OK
NG
OK REPAIR OR REPLACE HARNESS OR CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY)
INSPECT SPIRAL CABLE SUB-ASSEMBLY
Remove the spiral cable sub-assembly.
-
*a
Component without harness connected
(Spiral Cable Sub-assembly)
*b
Steering Pad Switch Assembly Side
*c
Vehicle Side
Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection
Condition
Specified Condition
z1-8 (EAU) - E6-3 (EAU)
Center
3 Ω or less
2.5 rotations to the left
2.5 rotations to the right
z1-11 (AU1) - E6-6 (AU1)
Center
3 Ω or less
2.5 rotations to the left
2.5 rotations to the right
z1-10 (AU2) - E6-5 (AU2)
Center
3 Ω or less
2.5 rotations to the left
2.5 rotations to the right
z1-9 (AU3) - E6-4 (AU3)
Center
3 Ω or less
2.5 rotations to the left
2.5 rotations to the right
After setting the spiral cable sub-assembly to the center position, rotate the spiral cable sub-assembly 2.5 times clockwise. Then while rotating the spiral cable sub-assembly 5 times counterclockwise, measure the resistance according to the table below.
Standard Resistance
Tester Connection
Condition
Specified Condition
z1-8 (EAU) - E6-3 (EAU)
Always
3 Ω or less
z1-11 (AU1) - E6-6 (AU1)
Always
3 Ω or less
z1-10 (AU2) - E6-5 (AU2)
Always
3 Ω or less
z1-9 (AU3) - E6-4 (AU3)
Always
3 Ω or less
Note:Press and hold the lock located in the center of the spiral cable sub-assembly to rotate the spiral cable sub-assembly.
The spiral cable sub-assembly is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable sub-assembly may prevent the airbag from deploying.
As the spiral cable sub-assembly may break, do not rotate the spiral cable sub-assembly more than the specified amount.
Result
Proceed to
OK
NG
OK REPAIR OR REPLACE HARNESS OR CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - SPIRAL CABLE SUB-ASSEMBLY)