Using Jumper Wire

Turn ignition on. Turn cruise main switch on. If CRUISE indicator light illuminates, leave ignition on and go to next step. If CRUISE indicator light does not illuminate, go to CRUISE INDICATOR LIGHT CIRCUIT under CIRCUIT TESTS.
To retrieve DTCs, turn cruise main switch off. Ensure ignition is on. Connect Jumper Wire (09843-18020) between terminals Tc and E1 of Data Link Connector 2 (DLC2) located under left side of instrument panel. See Fig 1. Observe CRUISE indicator light for DTC display and check as follows:
- CRUISE Indicator Light Does Not Illuminate
  
  See CRUISE INDICATOR LIGHT CIRCUIT under CIRCUIT TESTS.
- CRUISE Indicator Light Flashes Steadily
  
  No DTCs set ("normal" DTC).
- CRUISE Indicator Light Flashes DTCs
  
  See DIAGNOSTIC TROUBLE CODE (DTC) DEFINITION table. Go to appropriate DTC under DIAGNOSTIC TESTS .
After checking for DTCs, disconnect jumper wire and turn ignition off.

Fig 1: Identifying Data Link Connector 2 (DLC2) Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

DIAGNOSTIC TROUBLE CODE (DTC) DEFINITION

DTC

Definition

Shorted Actuator Motor Circuit

Actuator Magnetic Clutch Circuit

Actuator Mechanical Malfunction

Open Actuator Motor Circuit

Open Vehicle Speed Sensor Circuit

Vehicle Speed Signal Abnormal

32 ⁽¹⁾

Control Switch Circuit

Cruise Control ECU ⁽²⁾

Source Voltage Drop ⁽³⁾

Idle Signal Circuit

⁽¹⁾	On ES300 only.

⁽²⁾	Perform CRUISE CONTROL ECU PIN VOLTAGE TESTS under COMPONENT TESTS.

⁽³⁾	Perform ECU POWER SOURCE CIRCUIT TEST under CIRCUIT TESTS.