Reading Diagnostic Trouble Codes

Display The Trouble Codes:

To display the Diagnostic Trouble Code (DTC)
(1) Pull out the service check connector (2P) located behind the center console and connect the two terminals of the connector with a jumper wire.
(2) Turn the ignition switch ON, but do not start the engine.
(3) Watch as the 4WS indicator light blinks to display the code.
(4) Record the codes.

NOTES:
Be sure to record the code. If you do any of the following, the code will be erased.
- Disconnect the battery terminals.
- Remove No.43 CLOCK RADIO (10 A) fuse from the under-hood fuse/relay
box.
- Disconnect the 4WS control unit connector.
If the engine is started with the service connector jumped, the Malfunction Indicator Lamp (MIL) will stay on.

DTC Indication Pattern:

The 4WS indicator light displays a code by a series of long and short blinks. This indicator light can display multiple component problems by blinking separate codes, one after another. The number of long blinks equals the first digit of the code, the number of short blinks equals the second digit. When there are multiple codes, there is a two second pause between the codes.


System problems can be detected by both the main and sub central processing units (CPUs) in the 4WS control unit. Each CPU can memorize up to 10 codes. If both CPUs have stored codes, the 4WS indicator light will:
- Blink quickly once as an indicator light check, (this happens only when the ignition switch is first turned on).
- Pause for three seconds.
- Display the codes stored in the main CPU.
Pause for 1.6 seconds.
- Blink rapidly for three seconds to indicate the switch between the main and -sub CPU.
- Pause for 1.6 seconds.
- Display the codes stored in the sub CPU.
- Pause for three seconds, then repeat the cycle.
This cycle will continue until the ignition is turned OFF.

NOTE:Be sure to check both CPUs for at least 10 codes before turning OFF the ignition switch.
If the main and sub CPUs display the same codes, those codes need only be checked once.