Dynamic Radar Cruise Control System Distance Control Switch Circuit
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
INSPECT STEERING PAD SWITCH CABLE
INSPECT STEERING PAD SWITCH RH
INSPECT STEERING PAD SWITCH LH
INSPECT SRIRAL CABLE
CHECK WIRE HARNESS (DISTANCE CONTROL ECU - SPIRAL CABLE)
CHECK WIRE HARNESS (SPIRAL CABLE - BODY GROUND)
INSPECT DISTANCE CONTROL ECU
DYNAMIC RADAR CRUISE CONTROL SYSTEM - Distance Control Switch Circuit |
DESCRIPTION
The distance control switch sets the vehicle-to-vehicle distance mode. The distance control switch is installed in the steering pad switch. The vehicle-to-vehicle distance set value can be changed by operating the steering pad switch (distance control switch) while the dynamic radar cruise control system is in operation. The steering pad switch uses the BEAN to communicate with each ECU. Therefore it does not have a direct connection with the ECM. If there are any malfunctions in the communication line of the steering pad switch, one or more DTCs in the multiplex communication system are output.
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- When the distance control ECU is replaced with a new one, initialization must be performed (for LHD, Click here; for RHD, Click here).
| 1.INSPECT STEERING PAD SWITCH CABLE |
Remove the steering pad switch cable.
Measure the resistance of the connectors.
- Standard resistance:
Tester Connection
| Specified Condition
|
1 (DIST) - 1 (DIST)
| Below 1 Ω
|
7 (ECC) - 7 (ECC)
| Below 1 Ω
|
| | REPLACE STEERING PAD SWITCH CABLE |
|
|
| 2.INSPECT STEERING PAD SWITCH RH |
Connect the steering pad switch cable to the steering pad switch RH.
Measure the resistance of the connector.
- Standard resistance:
Tester Connection
| Condition
| Specified Condition
|
1 (DIST) - 7 (ECC)
| Distance control switch ON
| Below 2.5 Ω
|
1 (DIST) - 7 (ECC)
| Distance control switch OFF
| 10 kΩ or higher
|
| | REPAIR OR REPLACE STEERING PAD SWITCH RH |
|
|
| 3.INSPECT STEERING PAD SWITCH LH |
Connect the steering pad switch RH and steering pad switch cable to the steering pad switch LH.
Measure the resistance of the connector.
- Standard resistance:
Tester Connection
| Condition
| Specified Condition
|
A-4 (DIST) - A-6 (ECC)
| Distance control switch ON
| Below 2.5 Ω
|
A-4 (DIST) - A-6 (ECC)
| Distance control switch OFF
| 10 kΩ or higher
|
| | REPAIR OR REPLACE STEERING PAD SWITCH LH |
|
|
Disconnect the A and L20 spiral cable connectors.
Measure the resistance of the connectors.
- Standard resistance:
Tester Connection
| Specified Condition
|
A-4 - L20-11
| Below 1 Ω
|
A-6 - L20-2
| Below 1 Ω
|
| 5.CHECK WIRE HARNESS (DISTANCE CONTROL ECU - SPIRAL CABLE) |
Disconnect the L13 distance control ECU connector.
Measure the resistance of the wire harness side connectors.
- Standard resistance:
Tester Connection
| Specified Condition
|
L20-11 (DIST) - L13-16 (MODE)
| Below 1 Ω
|
L13-16 (MODE) - Body ground
| 10 kΩ or higher
|
| | REPAIR OR REPLACE WIRE HARNESS AND CONNECTOR |
|
|
| 6.CHECK WIRE HARNESS (SPIRAL CABLE - BODY GROUND) |
Measure the resistance of the wire harness side connector.
- Standard resistance:
Tester Connection
| Specified Condition
|
L20-2 (ECC) - Body ground
| Below 1 Ω
|
| | REPAIR OR REPLACE WIRE HARNESS AND CONNECTOR |
|
|
| 7.INSPECT DISTANCE CONTROL ECU |
Turn the engine switch on (IG).
Measure the voltage of the connector.
- Standard voltage:
Tester Connection
| Condition
| Specified Condition
|
L13-16 (MODE) - L13-12 (GND)
| Distance control switch ON
| 0 to 2 V
|
L13-16 (MODE) - L13-12 (GND)
| Distance control switch OFF
| 9 to 16 V
|
| | REPLACE DISTANCE CONTROL ECU |
|
|
| OK |
|
|
|
| PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE |
|
