GENERAL INFORMATION
SERVICE MANUAL NUMBER 36
90-864573 FEBRUARY 2002
Page 1A-5
Special Tools (continued)
Digital Diagnostic Terminal
DDT
91-823686A2
Description:
Display problem codes stored in the
ECM. It also allows the monitoring of
various circuits and components in the
fuel injection system. Must order the
91-803999 cartridge for MEFI 1, MEFI 2
and MEFI 3 ECM models 91-880118A2
cartridge for ECM 555 and PCM 555
models.
84-825003A1 Replacement 10 ft (3 m)
25-pin Harness
91-8404805 Optional Heavy Duty
Carrying case
Accessories:
An additional harness assembly may be
required when using the DDT, refer to
the following:
91-822560A13 Harness Assembly /
Diagnostic Tester
91-861540A1 Adaptor Harness
91-822560A7 Outboard Adapter
Harness
91-84-822560A5 EFI Outboard Adaptor
91-822560T12 Scan Tool Harness
Adaptor
91-822560A2 Harness Assembly /
Diagnostic Tester
74214
EFI Outboard Harness
Adaptor
Scan Tool Harness Adaptor
84-822560A5
84-822560T12
Description:
84-822560A5 Outboard Harness
Adaptor may be used with
91-823686A32 DDT Scan Tool for PCM
555 and ECM 555 models.
Use the Harness Adaptor 84-822560T12
For PCM 555 Models to adapt the 4-pin
Mercury MerCruiser connector to the
2-pin 84-822560A5 Outboard Harness.
84-822560A5
84-822560T12
78034
78069
