Model 387 Instrument System Service Manual
072-40245 B v
5.5 One or More Gauge Pointers Sweep . . . . . . . . . . . . . . . . . . 5-25
5.5.1 A J1708 Data Bus Gauge Pointer Sweeps . . . . . . . . . . . . . . . . . . . . . . . . 5-26
5.5.2 A Non-J1708 Data Bus Gauge Pointer Sweeps. . . . . . . . . . . . . . . . . . . . . . 5-26
5.5.3 Several (But Not All) Gauge Pointers Sweep . . . . . . . . . . . . . . . . . . . . . . . 5-27
5.5.4 SMC Pointer and All J1708 Data Bus Gauge Pointers Sweep . . . . . . . . . . . . . . 5-27
5.5.5 All J1708 Data Bus Gauge Pointers (Except the SMC Pointer) Sweep . . . . . . . . . . 5-29
5.5.6 All Gauge Pointers Except the SMC Pointer Sweep. . . . . . . . . . . . . . . . . . . . 5-30
5.5.7 Only the SMC Pointer Sweeps, and No Messages Appear . . . . . . . . . . . . . . . . 5-32
5.5.8 SMC Pointer Sweeps, and a NO DATA Message Appears . . . . . . . . . . . . . . . . 5-32
5.6 Warning Messages . . . . . . . . . . . . . . . . . . . . . . . 5-33
5.7 Backlighting Problems . . . . . . . . . . . . . . . . . . . . . . 5-34
5.7.1 Two-Inch Gauges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-34
5.7.1.1 One Gauge Has No Backlighting...........................................................................5-34
5.7.1.2 More Than One Gauge Has No Backlighting.........................................................5-34
5.7.1.3 All Gauges Plus Tachometer Have No Backlighting..............................................5-35
5.7.2 SMC Has No Backlighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-36
5.8 Select/Reset Switches not Working . . . . . . . . . . . . . . . . . . 5-36
5.9 Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . 5-38
6 Using the Handheld Diagnostic Tool 6-1
6.1 Care and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . 6-1
6.2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
6.3 Reading Engine ECU Gauge Data . . . . . . . . . . . . . . . . . . . . 6-3
6.3.1 Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
6.4 Reading Private Bus Gauge Data . . . . . . . . . . . . . . . . . . . . 6-6
6.4.1 Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
6.5 Viewing Configuration Data . . . . . . . . . . . . . . . . . . . . . 6-8
6.5.1 Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
6.6 Programming and Verifying Ports 5A and 5B . . . . . . . . . . . . . . . . 6-10
6.6.1 Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10
6.7 Programming the Main Transmission Temperature Warning LED. . . . . . . . . . 6-13
6.7.1 Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13
6.8 HDT Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . 6-16