Accessing Diagnostic Trouble Codes

ON BOARD DIAGNOSTICS
This system has a sophisticated diagnosis system, that when accessed with a bi-directional "Scan" tool, is designed to identify any system fault as specifically as possible, including intermittent faults.
Each input and output to the system can be monitored by using a suitable bi-directional "Scan" tool, monitoring inputs and outputs allows for fault confirmation and repair verification. The "Scan tool" can also be used to manually control components and perform functional tests. Connect "Scan" tool to data link connector located in lower lefthand instrument panel to the left of steering column.

Fig. 1 Tech 1 Scan Tool Key Function:

Fig. 2 ABS-VI System Wiring Circuit:

Fig. 4 EBCM 32 Way Electrical Connector:

Fig. 6 EBCM 2 Way Electrical Connector:

When using the following diagnostic procedure refer to Fig. 1 for "Scan" tool functions, Figs. 2, 4 and 6 for system wiring diagram and connectors. and Fig. 7 for diagnostic circuit check. ABS diagnostic trouble codes (DTC) may be accessed using a tool No. 09931-76011 Tech-1 diagnostic scan tool with tool No. 09932-65020 ABS-Air Bag cartridge, or equivalents.
1. Connect tool No. 09931-76011 Tech-1 diagnostic scan tool with tool No. 09932-65020 ABS-Air Bag cartridge, or equivalents.

ENHANCED DIAGNOSTICS
This information is found in the "CODE HISTORY" function of the "Scan" tool, and is used to provide specific fault occurrence information. This data is stored for each of the first five and the very last fault code, the data stored identifies the specific trouble code, the number of times the fault occurred and the number of drive cycles since the failure first and last occurred (a drive cycle occurs when the ignition is cycled "ON" and the vehicle is driven faster than 10 mph). If a fault is present, the drive cycle will increment by turning the ignition "ON" and "OFF". The order that the first five fault codes occurred can be useful in determining if a previous fault is linked to a more recent fault. This data can also be used to determine how often and under what circumstances the fault occurs.