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Ef3602 9

This document provides information about a fault code (EF3602-9) detected on a Volvo A40G vehicle. The fault indicates a critical failure of bus communication between the engine control unit and other electronic control units. Diagnostics show the starter motor cannot engage and the machine cannot shift gears. Possible causes include issues with the communication wiring harness, open or short circuits, or a defective control unit. The recommended action is to use the Volvo Guided Diagnostics tool to further diagnose the problem.

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4K views2 pages

Ef3602 9

This document provides information about a fault code (EF3602-9) detected on a Volvo A40G vehicle. The fault indicates a critical failure of bus communication between the engine control unit and other electronic control units. Diagnostics show the starter motor cannot engage and the machine cannot shift gears. Possible causes include issues with the communication wiring harness, open or short circuits, or a defective control unit. The recommended action is to use the Volvo Guided Diagnostics tool to further diagnose the problem.

Uploaded by

Awan
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Volvo Guided Diagnostics

Date: Information Type:


15/11/2023 Diagnostics Fault Codes
Profile:
A40G Volvo

EF3602-9
Showing Selected Profile

Valid for option/configuration


Model Option no. Option Configuration
A40G Volvo 11371629 Engine D13F Stage II/Tier 2

Valid for serial numbers


Model Production site Serial number start Serial number stop
A40G Volvo Braås 322001 329999

Machine display message


Text presentation EF3602-9

Reference Data bus system


Supervision data bus communication, description
Control unit, description

Fault mode diagnosis

Fault mode Detection conditions:Critical bus communication failure


The instrument control unit (HMIM) registers:

¡ that bus communication is missing with E-ECU on J1708/J1587


¡ that bus communication is missing with V-ECU on J1708/J1587
¡ that bus communication is missing with V-ECU on CAN1/J1939 + that bus
communication is missing with V-ECU on CAN2/J1939
¡ that bus communication is missing with V2-ECU on CAN1/J1939 + that bus
communication is missing with V2-ECU on CAN2/J1939

Symptom: Possible causes:

¡ Starter motor cannot be activated ¡ Ongoing TechTool operation: ECU,


¡ The machine does not go into Programming Parameter
gear programming
¡ Emergency stop switch has been
used
¡ Open circuit on bus
communication (cable harness)
¡ Short-circuit to frame ground or
voltage
¡ Leads in cable harness short-
circuited to each other
¡ Defective ECU

Action Use Guided Diagnostics


Fault mode Detection conditions:Critical bus communication failure
The vehicle control unit (V-ECU) registers:

¡ that bus communication is missing with HMIM on J1708/J1587


¡ that bus communication is missing with E-ECU on CAN1/J1939
¡ that bus communication is missing with HMIM on CAN1/J1939 + that bus
communication is missing with HMIM on CAN2/J1939
¡ that bus communication is missing with V2-ECU on CAN1/J1939 + that bus
communication is missing with V2-ECU on CAN2/J1939

Symptom: Possible causes:

¡ Starter motor cannot be activated ¡ Ongoing TechTool operation: ECU,


¡ The machine does not go into Programming Parameter
gear programming
¡ Open circuit on bus
communication (cable harness)
¡ Short-circuit to frame ground or
voltage
¡ Leads in cable harness short-
circuited to each other
¡ Defective ECU

Action Use Guided Diagnostics

Fault mode Detection conditions:Critical bus communication failure


The vehicle control unit 2 (V2-ECU) registers:

¡ that bus communication is missing with E-ECU on CAN1/J1939 + that bus


communication is missing with E-ECU on J1708/J1587
¡ that bus communication is missing with HMIM on CAN1/J1939 + that bus
communication is missing with HMIM on CAN2/J1939
¡ that bus communication is missing with V-ECU on CAN1/J1939 + that bus
communication is missing with V-ECU on CAN2/J1939

Symptom: Possible causes:

¡ Starter motor cannot be activated ¡ Ongoing TechTool operation: ECU,


¡ The machine does not go into Programming Parameter
gear programming
¡ Open circuit on bus
communication (cable harness)
¡ Short-circuit to frame ground or
voltage
¡ Leads in cable harness short-
circuited to each other
¡ Defective ECU

Action Use Guided Diagnostics

Guided Diagnostics

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