Reviewers Note: Words/phrases in blue will be links to specific diagnostic procedures when this document is published in Freshdesk.

Blue iQ™ Fault Code 6947 Diagnostic Procedure

DSM.0018 Ver. 3.0 April 24, 2023
FC

SPN

FMI

6947

8247

7

Title
Fuel Tank Receptacle Cover - Mechanical System Not Responding or Out of
Adjustment

Parts Affected
receptacle cover 1
receptacle cover 2
receptacle cover 3
receptacle cover 4
receptacle cover 5
NOTE: The above terms are used by INSITE™. Depending upon cover type and configuration, Hexagon®
Agility® refers to these drive away protection (DAP) components as follows:
fuel fill door (box FMMs)
fuel receptacle cover
fuel receptacle kill cap

Diagnostic Overview
Fault Code 6947 triggers when an engine crank is attempted and the Blue iQ™ Fuel System Control Module
(FSCM) detects one or more of the following conditions related to DAP components:
a) fuel fill door open or damaged
b) fuel receptacle cover not / improperly installed
c) kill cap not / improperly installed
d) fuel receptacle cover or kill cap magnet missing
e) faulty reed switch
f)

damage to DAP circuit

Fault Code 9647 will trigger every time a crank is attempted due to the incorrect state of the DAP component.
Because multiple components are potentially responsible for FC 6947, consult relevant sections of the Blue iQ™
Diagnostic Service Manual, vehicle-specific Drive Away Protection Circuit Diagram for fuel receptacle
configuration, and follow corresponding Circuit / System Verification steps below.

Circuit / System Verification
Step 1
Connect Cummins® INSITE™ to vehicle using J1939 OBD-II diagnostic interface and PC and navigate to “Agility®
Fuel Delivery System, CM1881 AFS(18)” module.
Step 2
Record all active and stored fault codes and parameters prior to clearing fault codes using INSITE™.
Step 3

Reviewers Note: Words/phrases in blue will be links to specific diagnostic procedures when this document is published in Freshdesk.

While systematically removing and reinstalling each FMM fuel door / fuel receptacle cover / kill cap,
simultaneously observe INSITE™ Fuel Tank Receptacle Cover data for status change (OPEN or CLOSED)
and record status.
a. If status does not change proceed to Circuit/System Testing on affected door or caps.
b. If status changes proceed to Step 4.
Step 4
Operate vehicle in same conditions for enabling the fault code or within same conditions that triggered fault
code based on recorded data.
Step 5
Verify fault code does not set. If any fault code sets proceed to Circuit/System Testing.
Step 6
While observing the Fuel Tank Receptacle Cover parameters in INSITE™ perform a wiggle test on harness
and connectors to test for poor or intermittent connections.
a. If any fault code sets, proceed to Circuit/System Testing.
b. If no fault code sets, system is functioning to design intent.
Step 7
Upon repair completion, complete Reassembly and Validation Procedure.

Diagnostic Link
Drive Away Protection (DAP) Circuit Schematic

Circuit / System Testing
Step 1
If present, check each of the following items:
 Is FMM fuel door fully closed?
 Are all kill cap(s) properly installed?
 Are all fuel receptacle cover(s) properly installed?
Yes – Proceed to Step 2.
No – Close FMM fuel door / install receptacle fuel covers / kill cap(s)
Operate vehicle to verify if fault code returns.
Step 2
 Ignition OFF.
 Disconnect 2-pin reed switch harness connector for the circuit which indicated “OFF” in INSITE™.
 Check resistance across 2-pin reed switch assembly connector Pin A and Pin B.
Pin A

Pin B

A

Resistance between zero and 1 ohms?
Yes – Proceed to Step 3.

B

Reviewers Note: Words/phrases in blue will be links to specific diagnostic procedures when this document is published in Freshdesk.

No – Replace FMM fuel door switch / reed switch assembly.
Step 3
 Ignition ON.
 Open FMM fuel door / remove fuel receptacle dust caps or fuel receptacle kill cap(s).
 Check for voltage between 2-pin reed switch harness connector Pin A and known good ground.

Pin A –
Gray wire

2-pin reed switch harness connector end view

Voltage between 4.8 V and 5.2 V?
Yes – Proceed to Step 7.
No – Proceed to Step 4.
Step 4




Ignition OFF.
Disconnect Blue iQ™ harness FSCM connector.
Refer to the chart below to measure resistance of the 5V Supply circuit for which INSITE™ indicated
a fault.

Standard (all systems):
Two DAP sensor configurations
From
To
2-pin Connector
Pin
Connector
DAP #1
A
FSCM
DAP #2
A
FSCM
Pin 6 –
Gray wire

Pin
6
8

Optional:
Three to five DAP sensor configurations
From
To
2-pin Connector
Pin
Connector
Pin
DAP #3
A
FSCM
25
DAP #4
A
FSCM
24
DAP #5
A
FSCM
10

Pin 8 –
Gray wire
Pin 10 –
Gray wire

Pin 25 –
Gray wire
Pin 24 –
Gray wire

Pin A –
Gray wire

2-pin reed switch harness
connector end view

FSCM harness connector end view

Resistance between zero and 1 ohms?
Yes – Contact Hexagon Agility FleetCare.
No – If the fault is in the circuit for DAP #3, #4, or #5, proceed to Step 5.
If the fault is in the circuit for DAP #1 or DAP #2, repair open / high resistance in 5V Supply circuit.

Reviewers Note: Words/phrases in blue will be links to specific diagnostic procedures when this document is published in Freshdesk.

Step 5
Ignition OFF.
Refer to the chart below to measure resistance of the FMM harness bulkhead to FSCM 5V Supply circuit for
which INSITE™ indicated a fault.

Circuit
DAP #3
DAP #4
DAP #5

Three to five DAP sensor configurations
From
To
Connector
Pin
Connector
Bulkhead, FMM side
20
FSCM
Bulkhead, FMM side
22
FSCM
Bulkhead, FMM side
24
FSCM
Pin 20 –
Gray wire

Pin
25
24
10

Pin 24 –
Gray wire
Pin 10 –
Gray wire

Pin 22 –
Gray wire

Pin 25 –
Gray wire

Pin 24 –
Gray wire
bulkhead connector end view – FMM side

FSCM harness connector end view

Resistance between zero and 1 ohms?
Yes – Proceed to Step 6.
No – If the fault is in the circuit for DAP #5, repair open / high resistance in 5V Supply circuit.
If the fault is in the circuit for DAP #3 or #4, proceed to Step 10.
Step 6
 Ignition OFF.
 Disconnect Blue iQ™ chassis bulkhead harness connector.
 Disconnect reed switch harness connector.
 Refer to the chart below to measure resistance of the chassis harness bulkhead to DAP reed switch 5V
Supply circuit for which INSITE™ indicated a fault.

Circuit
DAP #3
DAP #4
DAP #5

Three to five DAP sensor configurations
From
To
Connector
Pin
Connector
Bulkhead, FMM side
20
FSCM
Bulkhead, FMM side
22
FSCM
Bulkhead, FMM side
24
FSCM

Pin
25
24
10

Reviewers Note: Words/phrases in blue will be links to specific diagnostic procedures when this document is published in Freshdesk.

Pin 20 –
Gray wire
Pin A –
Gray wire

Pin 22 –
Gray wire

2-pin reed switch harness
connector end view

Pin 24 –
Gray wire
bulkhead connector end view – chassis side

Resistance between zero and 1 ohms?
Yes – Contact Hexagon Agility FleetCare.
No – Repair open / high resistance in chassis harness 5V Supply circuit.
Step 7
Ignition OFF.
Disconnect Blue iQ™ harness FSCM connector.
Refer to the chart below to measure resistance of the bulkhead to FSCM 5V Low-Reference circuit for which
INSITE™ indicated a fault.
Optional:
Standard (all systems):
Three
to
five
DAP
sensor configurations
Two DAP sensor configurations
From
To
From
To
2-pin
2-pin
Pin
Connector Pin
Pin
Connector Pin
Circuit Connector
Circuit Connector
DAP #3
DAP 3
B
FSCM
27
DAP #1
DAP 1
B
FSCM
5
DAP
#4
DAP
4
B
FSCM
27
DAP #2
DAP 2
B
FSCM
5
DAP #5
DAP 5
B
FSCM
27
Standard (all systems):
Two DAP sensor configurations
From
To
2-pin
Pin
Connector
Pin
Circuit Connector
DAP #1 DAP 1
B
FSCM
5
DAP #2 DAP 2
B
FSCM
5