ESD Actuator Input Voltage Inspection

NOTE

Be sure the battery is fully charged.

• Turn the ignition switch to OFF.
• Disconnect the ESD actuator connector and connect a suitable measuring leads [A] between these connectors as shown.

Main Harness [B] ESD Actuator [C]

Connect the peak voltage adapter [D] and a digital meter [E] to the measuring adapter leads.

Special Tool - Peak Voltage Adapter: 57001-1415 Type: KEK-54-9-B

ESD Actuator Input Voltage Connections to Adapter:

(I) Digital Meter (+) → BK (actuator BK) lead Digital Meter (–) → Battery (–) terminal (II) Digital Meter (+) → R (actuator R) lead Digital Meter (–) → Battery (–) terminal (III) Digital Meter (+) → W (actuator O) lead Digital Meter (–) → Battery (–) terminal (IV) Digital Meter (+) → Y (actuator Y) lead Digital Meter (–) → Battery (–) terminal

• Measure the actuator input voltage with the engine stopped and with the connector joined.
• Turn the ignition switch to ON.

Input Voltage Standard: About DC 9 11 V and then
0.1 V or About DC 9 11 V

• Turn the ignition switch to OFF.

If the reading is out of the specification, remove the ESD ECU and check the wiring for continuity between main harness connector.

Special Tool - Hand Tester: 57001-1394

Disconnect the ESD ECU and actuator connectors.

Wiring Continuity Inspection ESD ECU Connector [A] ←→ ESD Actuator Connector [B] BK lead (ESD ECU terminal 3) [C] R lead (ESD ECU terminal 4) [D] O lead (ESD ECU terminal 12) [E] Y lead (ESD ECU terminal 13) [F]

If the wiring is good, check the ESD ECU for its ground and power supply (see ESD ECU Power Supply Inspection).

If the ground and power supply are good, replace the ESD ECU (see ESD (Electronic Steering Damper) ECU Removal/ Installation in the Steering chapter).

ESD Actuator Circuit

1. ESD ECU

2. ESD Actuator