RETRIEVING DIAGNOSTIC TROUBLE CODES
The first digit of the Diagnostic Trouble Code (DTC) defines whether the DTC set is a Federally mandated DTC (P0xxx) or a Land Rover DTC (P1xxx). A Land Rover TestBook can retrieve and diagnose all DTCs. An OBD-II compliant scan tool can only retrieve and diagnose Federally mandated DTCs. Refer to scan tool manufacturer's user manual for specific procedures. For Discovery Series I DTCs, see DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION (GEMS) table. For Discovery Series II and Range Rover DTCs, see DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION (BOSCH) table.
CLEARING DIAGNOSTIC TROUBLE CODES
Diagnostic Trouble Codes (DTCs) can be cleared using a Land Rover TestBook system or OBD-II compliant scan tool. Follow TestBook system or scan tool manufacturer instructions.
TEST EQUIPMENT
All voltage tests should be performed using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance, unless specifically stated differently in testing procedure. DO NOT use test lights to test circuits containing solid state devices, doing so can damage solid state devices. When instructed to use a jumper wire ensure an in-line, 5-amp fuse is included. A Land Rover TestBook system, OBD-II compliant scan tool or a Snap-On Personal Automotive Computer (PAC) can be used to diagnosis driveability problems. Follow equipment manufacturer operating instructions. If using a Snap-On PAC, see appropriate examples of known-good wave patterns.