Engine ECU, Fault Tracing

 
Volvo Trucks North America, Inc.
  D a t e   G r o u p   N o .   P a g
e
Service Bulletin
 12.2004
  2 8 4   0 4
 3(14)
Checking EA voltage (lower connector)
W2004488
Before Checks
Verify that ground terminals EA57 (main) and EA11
(5Vg r o u n d )   a r e   p r o p e r l y g r o u n d e d ( l e s s t h a n   1 0   t o   g r o u n d ) .
Note:
 > — Greater than

Note:

> — Greater than< — Less than

— Approximately
 Terminal Signal type Measurement

terminal Signal type Punto Valor Valor Notas

medicion nominal medido pagina
EA3 Fuel pump EA3- ≈7 - 9 V
EA57 (inactive)
≈ 0 V (active)

EA7 Suply to sensor EA7- 4.80 – 5.15 V

(5v) EA11
EA22 Intake manifold EA11 – 1.1 ± 0.7 V
pressure EA22 (at sea level)
sensor, signal
EA30 EGR EA30 – ≈4.9 V @ 20 3
temperature EB18 C (68F)
sensor
EA31 Oil temperature EA11 – ≈3.0 V @ 20
sensor, signal EA31 C (68 F) ≈ 0.4
V @ 100C
(212F)

EA35 Fan speed EA35 – 0.005 – 5V 4

sensor, viscous EA39
fan only (signal)
EA47 Intake manifold EA11- ≈2.6 V @ 20
air temperature EA47 C (68 F) ≈1.6
Sensor (signal) V @ 40 C
(104 F)

Notes

1 Normally “inactive” with ignition key in ON position.

2 Normally “open” with ignition key in ON position.

3 Measurement requires use of 2 breakout boxes9998699 and adapters 9990014, connected to

the EECU and both EA and EB connectors.

4 The value will change between 0.005 and 5 V sixtimes during one revolution of the fan.

5 Make check with engine running for best accuracy.

CHEKING EB VOLTAGE (UPPER CONECTOR)

Ground Checks
Verify that ground terminals EB10 (coolant level ground),EB58, EB59, EB61
(main), and EB18 (5V ground)
areproperly grounded (less than 10 to ground).
 
Note:
 > — Greater than
< — Less than
≈ — Approximately

EB7
Preheater EB7 - >65% B+ 1
1, heater EB59 (active)0 V
diagnostics (inactive)
EB11 Oil EB11 - ≈0.5 V (engine
pressure EB18 not running)
sensor,
signal
EB14 Preheater EB14 - >65% B+ 1
2, heater EB59 (active)0 V
diagnostics (inactive)
EB15 Buffered EB15 0 - 4 V (inactive;
idle -EB59 pedal at rest)> 8
validation V (active,
switch depressed
acceleratorpedal
(AP))
EB16 Fuel EB16 0.5 V (engine 3
pressure -EA11 not running)
sensor,
signal
EB17 Supply to EB17 - 4.80 - 5.15 V
sensor EB18
 (5V)
EB19 EGR EB19 - ≈ 0.2 - 0.8 V
position 2 EB18 (valve closed)
EB23 Coolant EB23 - ≈ 80% B+ (open) 2
level EB10 - level normal 0
sensor, V (closed) - level
signal low

EB24 EGR position EB24 - ≈ 0.2 - 0.8 V 1

1 EB18 (valve
closed)EB25
Preheater
relay EB25 -
EB59 B+
(inactive)0
V (active)
EB27 Coolant EB27 - ≈ 3.0 V @
temperature EB18 20 C (68 F) ≈
sensor, 0.6 V @ 85
signal C (185 F)
EB28 Crankcase EB28 - 2.9 ± 0.6 V
pressure EB18 (at sea
sensor level)
EB30 VCB EB30 - B+ 1
EB61 (inactive)0
V (active)
EB38 EPG signal EB38 - ≈ 8.5 - 10.5 1
EB59 V<1.0 V
(active;
100%)

EB49 Fan control EB49 - B+ (inactive; fan 5

engaged/locked)0
 (On/Off) EB59 V (active; fan
disengaged/free)

EB49 E-Viscous B+ (fan 5

requested,
output not
grounded) ≈
0 V (no fan
speed
requested,
output
grounded)
EB57 Supply EB57 - EB59 B+
voltage, EECU
EB60 Supply EB60 - EB61 B+
voltage, EECU
RESISTENCIAS

EA3 Fuel pump EA3 - EA57 > 10 Ohmios

EA12 Unit injector EA12 - EA62 0.9 - 5.2
cylinder 2 ohmions @20
(NCV) C (68 F)1.5 -
5.8 ohmios
@103 C (218
F)
EA16 Unit injector EA16 - EA59 1.1 - 5.8 oh
cylinder 2 @20 C (68
(SV) F)1.9 - 6.2 oh
@103 C (218 3
F)
EA20 Unit injector EA20 - EA62 0.9 - 5.2 oh 2
cylinder 1 @20 C (68
(NCV F)1.5 - 5.8 oh
@103 C (218
F)
EA24 Unit injector EA24 - EA59 1.1 - 5.8 oh 3
cylinder 1 @20 C (68
(SV) F)1.9 - 6.2 oh
@103 C (218
F)
EA28) Unit injector EA28 - EA62 0.9 - 5.2 oh 2
cylinder 3 @20 C (68
(NCV F)1.5 - 5.8 oh
@103 C (218
F)
EA30 EGR EA30 - EB18 37 +2.8/-2.0
temperature kiloohmios
sensor
EA31 Oil EA31 - EA11 1.9 k ohmi @
temperature 20 C(68 F)100
sensor, signal oh @ 100C
(212F)
EA32 Unit injector EA32 - EA59 1.1 - 5.8 oh 3
cylinder 3 @20 C
(SV) (68F)1.9 - 6.2
oh @103C
(218F)
EA36 Unit injector EA36 - EA61 0.9 - 5.2 oh 2
cylinder 6 @20 C
(NCV) (68F)1.5 - 5.8
oh @103C
(218F)
EA37 Speed sensor EA37 - EA38 775 – 945 oh
flywheel, (+)
EA45 Camshaft EA45 - EA46 775 – 945 oh
sensor (+)
EA40 EA40 - EA60 3

Unit injector 1.1 - 5.8 oh

cylinder 6 @20C
(SV) (68F)1.9 - 6.2
oh @103C
(218F)
EA44 Unit injector EA44 - EA61 0.9 - 5.2 oh 2
cylinder 5 @20C
(NCV) (68F)1.5 - 5.8
oh @103C
(218F)
EA47) Intake EA47 - EA11 6.2 koh @
manifold air 20C(68F)2.5
temperature koh @
sensor, signal 40C(104F
EA48) Unit injector EA48 - EA60 1.1 - 5.8 oh 3
cylinder 5 (SV @20C
(68F)1.9 - 6.2
oh @103C
(218F)
EA52 Unit injector EA52 - EA61 0.9 - 5.2 oh 2
cylinder 4 @20C
(NCV) (68F)1.5 - 5.8
oh @103C
(218F)
EA56 Unit injector EA56 - EA60 1.1 - 5.8 oh 3
cylinder 4 @20C
(SV) (68F)1.9 - 6.2
oh @103C
(218F)
RESISTENCIAS PUERTO B

EB3 Oil level EB3 - EB4 11.7 - 12.9 Oh

sensor @22C (72F)
EB5 EGR valve 2 EB5 - EB1 1 – 10 oh
(+)
EB7 Preheater 1, EB7 - EB59 < 5.0 oh 1
heater (closed)∞(open)
diagnostics
EB13 EGR valve 1 EB13 - EB9 1 – 10 oh
(+)
EB14 Preheater 2, EB14 - EB59 < 5.0 1
heater oh(closed)∞(open
diagnostics )
EB19 EGR position EB19 - EB18 ≈ 0.9 k oh4
2
EB23 Coolant level EB23 - EB10 < 5.0 ohm
sensor, signal (closed)- level
low>100 kohm
(open)- level
normal
EB24 EGR position EB24 - EB18 ≈0.9 kohm 4
1
EB27 Coolant EB27 - EB18 1.9 kohm @
temperature 20C(68F)160
sensor, signal ohm@ 85C(185F)
EB49 Fan control EB49 - EB57 (ON/OFF) 15 – 100
ohm
EB49 Fan control EB49 - EB57 < 50 ohm
(E-Viscous)
Notes

1 Normally, a “closed” measurement reveals a good circuit, fuse, and preheater element.

2 NCV = Needle Control Valve

3 SV = Spill Valve

4 Valve closed.

5 Measurement requires use of 2 breakout boxes9998699 and adapters 9990014, connected to

theEECU and both EA and EB connectors.

COMPONENTES CODIGOS PLANOS

A14 EECU (engine electronic control unit)

A17 VECU (vehicle electronic control unit)

A43 Engine group component. Contains B32 and Y35.

A44 Engine group component. Contains B51 and M15.

B04 Sensor, engine speed, crankshaft

B05 Sensor, engine position, camshaft

B10 Sensor, oil level

B21 Sensor, engine coolant temperature

B32 Sensor, fan speed

B37 Sensor, air intake pressure and charge air temperature

B38 Sensor, oil pressure and oil temperature

B51 Sensor, fuel pressure

B54 Sensor, pressure, crankcase

B66 Sensor, EGR temperature

M15 Engine, electric fuel pump

R01 Preheater elementS68 Sensor, coolant level

Y33 Solenoid valves, UI (unit injector)

Y34A EGR valve 1 (contains B65 position sensor)

Y34B EGR valve 2 (contains B65 position sensor)

Y35 Solenoid, fan (E-Viscous) (On/off fan after 10/03)

Y37 Solenoid valve (PWM valve), exhaust pressure governor(EPG)

Y39 Solenoid valve, Volvo compression brake

Y53A Solenoid, On/Off fan (10/02 — 9/03)