System Diagnostics

Overview

The UZZ32 Soarers contain an on-board diagnostic system which will check key systems and return error codes which explain where the fault is. This section explains how it works, what systems are covered, how to enter each of the diagnostic modes and how to access the results

What systems are covered

The system can check components such as:

• Engine
• Brakes
• Active Suspension
• Air Conditioning
• 4WS
• Automatic Transmission

How the system works

The system automatically watches for things happening that shouldn't (including, say, pressure being too low or too high), as well as by things that should have occurred, but haven't (such as a wheel turning) and

If a system failure occurs, the system will remember it and store an error code.

In general, the troubleshooting process will be:

• clear any old error codes
• optionally, enter diagnostic mode for the relevant system
• test drive the vehicle
• capture error codes
• look up error codes and address problem areas

Clearing old error codes

To avoid unnecessary confusion by "old" error codes (that may no longer be occurring), it is generally advisable to clear any existing error codes before conducting a test.

The error codes are cleared when certain fuses (_ and _) are removed, or when the battery is disconnected for at least 10 seconds.

How to enter diagnostic mode

Then, enter the diagnostic mode and take the vehicle for a test drive. Be sure to also exercise relevant buttons (eg suspension high, suspension off) as the system would otherwise report those as faulty.

To enter diagnostic mode, the DLC1 or DLC2 connector pins need to be connected correctly. Alternatively, pressing the _ and _ buttons on the EMV simultaneously for _ seconds is the equivalent.

The available test modes include:

• TE & TS connected to E1.

Test drive

The service manual explains the detailed procedures to ensure the right sensors are triggered in test mode, including eg:

• accelerate
• brake
• turn
• press various buttons as instructed
• open door

In general these procedures are designed to ensure that the vehicle is driven so that relevant systems, sensors and controls are operated.

How to access the results

The results can be viewed through in three different ways:

• The EMV displays multiple test results simultaneously
• The LCD panel on the dash displays test results one by one
• By connecting a test light / LED to the DLC connector

EMV

The EMV is the most user-friendly but may not work for all test modes. Unlike the lesser feedback mechanisms, the EMV can report the date & time at which each error code last occurred.

LCD

If the EMV is not available, the LCD is the next best option. It will display, eg SUS OK or ABS NG. Press Scroll button to move to the next display, which could be eg ABS 51. Repeat until all errors have been captured.

LED test light

connect test light / led / volt meter between pins x and x. Then count the pulses.

Ie code 3 would be: - - -

And thirty three would be - - - - - -

If multiple codes are sent, there will be a longer gap between them.