Retrieving Trouble Codes

Codes from CC ECU self-diagnostic system are retrieved through Data Link Connector (DLC). Test drive vehicle to allow trouble codes to set in CC ECU memory. If CRUISE indicator light begins to flash while driving or cruise control will not set or operate, check for trouble codes. Go to next step.
Stop vehicle and leave ignition switch in ON position. Locate Black DLC on driver side of engine compartment. Connect jumper wire between DLC terminal E1 (Brown wire) and terminal Tc (Yellow/Black wire). See Fig 1.
If any trouble code is present, perform test(s) in order given. See CC ECU TROUBLE CODE DEFINITION table. If no trouble codes are present and CRUISE indicator light begins flashing on and off every .25 seconds, system is normal. If no codes are present, CRUISE indicator light does not flash on and off, and cruise control system malfunction still exists, perform CRUISE CONTROL CIRCUIT FUNCTION TEST under TROUBLE SHOOTING.

Fig 1: Identifying DLC Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CC ECU TROUBLE CODE DEFINITION

Code No.

Problem

⁽¹⁾ Perform Test No.

Normal

Indicator Light Flashes On & Off

None

Overcurrent (Short) In Motor Circuit

1 , 2 , 3 ⁽²⁾⁽³⁾

Overcurrent (Short) In Magnet Clutch Circuit

1 , 2 , 3 ⁽²⁾7 ⁽³⁾

Open In Magnet Clutch Circuit For 0.8 Second

1 , 2 , 3 ⁽²⁾7 ⁽³⁾

13 ⁽⁴⁾

Actuator Position Sensor Detects Abnormal Voltage

1 , 2 , 3 ⁽²⁾⁽³⁾

Open In Actuator Motor Circuit

1 , 2 , 3 ⁽²⁾⁽³⁾

Position Sensor Signal Value Does Not Change When Motor Operates

1 , 2 , 3 ⁽²⁾, ⁽³⁾

15 ⁽⁵⁾

Open In Actuator Motor Circuit

1 , 2 , 3 ⁽²⁾, ⁽³⁾

Speed Sensor Signal Not Sent To CC ECU For 140 Milliseconds Or Longer

4, ⁽²⁾, ⁽³⁾

23 ⁽⁶⁾

Vehicle Speed Sensor Pulse Abnormal

4 ⁽²⁾, ⁽³⁾

Short In CRUISE ON-OFF (MAIN) Switch

5 , 6 , ⁽²⁾⁽³⁾

Faulty Cruise Control ECU

⁽²⁾, ⁽³⁾

Source Voltage Drop

12 , 13

51 ⁽⁵⁾

Short In Idle Signal Circuit

8 ⁽²⁾⁽³⁾

⁽¹⁾	Perform test numbers in order given.

⁽²⁾	Check wiring harness and connectors.

⁽³⁾	Check CC ECU. See CRUISE CONTROL ECU CIRCUIT TEST . Replace CC ECU as necessary.

⁽⁴⁾	4-cylinder models only.

⁽⁵⁾	V6 models only.

⁽⁶⁾	If speed set can be maintained when CRUISE ON-OFF (MAIN) switch is again set to SET/COAST position, there is no malfunction.