Facebook-f Twitter Github Bitbucket
Shop
Account
Cart $220.00
1
1
Subtotal: $220.00
Isuzu US-IDSS 2024 Diagnostic is a comprehensive tool for the effective maintenance and repair of Isuzu vehicles. It integrates advanced diagnostic features to assist technicians in identifying and resolving issues promptly. This system supports a wide range of Isuzu models, ensuring compatibility with both US and Canadian specifications. Its capabilities include vehicle recognition, fault code analysis, and real-time data access to streamline the diagnostic process.
Isuzu US-IDSS 2024 Diagnostic
1 × $220.00
Subtotal: $220.00
View cart Checkout

Cummins ISB CM550 (1990-94) Fault Code: 369 PID: 1690 SPN: 1078 FMI: 2 Fuel Pump To Engine Synchronization Pulse Not Recognized

Circuit Description
The engine control module (ECM) receives a signal from the engine speed/position sensor. This signal is then sent to the fuel pump to indicate where top dead center is for each cylinder.

Component Location
The engine speed/position sensor is located on the fuel-pump side of the block, behind the starter.

Shop Talk
The fuel pump controller monitors/processes 10- to 12-VDC square wave signals at pin 8 (engine harness pump end). The leading edge of this wave is the top dead center reference for the pump. The reference signal must occur within a defined window. If an engine pulse is not recognized within a window, the pump controller sets an error (bit 12). If a final error (bit 13) is set, Fault Code 369 is triggered after 10 seconds while the engine is operating. If Fault Code 368 occurs along with Fault Code 369, verify the engine static timing. Most occurrences of this fault are due to improper wiring by original equipment manufacturer (OEMs) or to grounding issues, loose/shorted wires, or electrical noise.

Categories , , Tags , , , , , , , ,
Facebook Twitter Youtube
Wiring Diagrams
Component Locators

Related products