Navigation System Steering Pad Switch Circuit
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
INSPECT NAVIGATION RECEIVER ASSEMBLY
INSPECT STEERING PAD SWITCH ASSEMBLY
INSPECT SPIRAL CABLE
CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - NAVIGATION RECEIVER)
NAVIGATION SYSTEM - Steering Pad Switch Circuit |
DESCRIPTION
This circuit sends an operation signal from the steering pad switch to the navigation receiver assembly.If there is an open in the circuit, the navigation system cannot be operated using the steering pad switch.If there is a short in the circuit, the resulting condition is the same as that when the switch were continuously depressed. Therefore, the navigation receiver assembly cannot be operated using the steering pad switch, and the navigation receiver assembly itself cannot function.
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- The vehicle is equipped with an SRS (Supplemental Restraint System) such as the airbags. Before servicing (including removal or installation of parts), be sure to read the precaution for Supplemental Restraint System (CAMRY_ACV40 RM000000KT10BKX.html).
| 1.INSPECT NAVIGATION RECEIVER ASSEMBLY |
Disconnect the navigation receiver assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Switch Condition
| Specified Condition
|
F24-7 (SW1) - F24-6 (SWG)
| No switch pushed
| 95 to 105 kΩ
|
F24-7 (SW1) - F24-6 (SWG)
| Seek+ switch: pushed
| Below 2.5 Ω
|
F24-7 (SW1) - F24-6 (SWG)
| Seek- switch: pushed
| 312.5 to 345.4 Ω
|
F24-7 (SW1) - F24-6 (SWG)
| Volume+ switch: pushed
| 950 to 1050 Ω
|
F24-7 (SW1) - F24-6 (SWG)
| Volume- switch: pushed
| 2954.5 to 3265.5 Ω
|
F24-8 (SW2) - F24-6 (SWG)
| No switch pushed
| 95 to 105 kΩ
|
F24-8 (SW2) - F24-6 (SWG)
| MODE switch: pushed
| Below 2.5 Ω
|
F24-8 (SW2) - F24-6 (SWG)
| Voice switch: pushed
| 2954.5 to 3265.5 Ω
|
F24-8 (SW2) - F24-6 (SWG)
| On hook switch: pushed
| 312.5 to 345.4 Ω
|
F24-8 (SW2) - F24-6 (SWG)
| Off hook switch: pushed
| 950 to 1050 Ω
|
Text in Illustration*1
| Front view of wire harness connector
(to Navigation Receiver Assembly)
|
| 2.INSPECT STEERING PAD SWITCH ASSEMBLY |
Disconnect the steering pad switch assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Switch Condition
| Specified Condition
|
a1-10 (AU1) - a1-8 (EAU)
| No switch pushed
| 95 to 105 kΩ
|
a1-10 (AU1) - a1-8 (EAU)
| Seek+ switch: pushed
| Below 2.5 Ω
|
a1-10 (AU1) - a1-8 (EAU)
| Seek- switch: pushed
| 312.5 to 345.4 Ω
|
a1-10 (AU1) - a1-8 (EAU)
| Volume+ switch: pushed
| 950 to 1050 Ω
|
a1-10 (AU1) - a1-8 (EAU)
| Volume- switch: pushed
| 2954.5 to 3265.5 Ω
|
a1-9 (AU2) - a1-8 (EAU)
| No switch pushed
| 95 to 105 kΩ
|
a1-9 (AU2) - a1-8 (EAU)
| MODE switch: pushed
| Below 2.5 Ω
|
a1-9 (AU2) - a1-8 (EAU)
| Voice switch: pushed
| 2954.5 to 3265.5 Ω
|
a1-9 (AU2) - a1-8 (EAU)
| On hook switch: pushed
| 312.5 to 345.4 Ω
|
a1-9 (AU2) - a1-8 (EAU)
| Off hook switch: pushed
| 950 to 1050 Ω
|
Disconnect the spiral cable connectors.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Spiral cable position
| Specified Condition
|
a1-8 (EAU) - E18-4 (EAU)
| Center
| Below 1 Ω
|
2.5 rotations to the left
|
2.5 rotations to the right
|
a1-10 (AU1) - E18-6 (AU1)
| Center
| Below 1 Ω
|
2.5 rotations to the left
|
2.5 rotations to the right
|
a1-9 (AU2) - E18-5 (AU2)
| Center
| Below 1 Ω
|
2.5 rotations to the left
|
2.5 rotations to the right
|
- NOTICE:
- The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may prevent the airbag from deploying. Be sure to read the page shown in the brackets.
- HINT:
- Removal (CAMRY_ACV40 RM000000UWD06SX.html)
- Installation (CAMRY_ACV40 RM000000UWA06SX.html)
Text in Illustration*1
| Component without harness connected
(Spiral Cable)
|
*2
| Steering Pad Switch Side
|
*3
| Vehicle Side
|
| 4.CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - NAVIGATION RECEIVER) |
Disconnect the navigation receiver assembly connector.
Disconnect the spiral cable connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Condition
| Specified Condition
|
E18-6 (AU1) - F24-7 (SW1)
| Always
| Below 1 Ω
|
E18-4 (EAU) - F24-6 (SWG)
| Always
| Below 1 Ω
|
E18-5 (AU2) - F24-8 (SW2)
| Always
| Below 1 Ω
|
E18-6 (AU1) - Body ground
| Always
| 10 kΩ or higher
|
E18-4 (EAU) - Body ground
| Always
| 10 kΩ or higher
|
E18-5 (AU2) - Body ground
| Always
| 10 kΩ or higher
|
Text in Illustration*1
| Front view of wire harness connector
(to Navigation Receiver Assembly)
|
*2
| Front view of wire harness connector
(to Spiral Cable)
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
