BACKUP SPEED/TIMING

CONNECTION LOCATION VIEWS 3406E INDUSTRIAL ENGINE ONLY SENR1072-01

(J44/P44)
February 1998

COOLANT TEMPERATURE
(J21/P21)

OIL PRESSURE
(J22/P22)

INLET AIR MANIFOLD PRESSURE ATMOSPHERIC PRESSURE

(J23/P23) (J27/P27)
PRIMARY SPEED/TIMING

3176C, 3196, 3406E & 3456

(J20/P20)

Left Side View Industrial Engines

6BR1-UP
1DW1-UP
2AW1-UP
3LW1-UP

ELECTRONIC CONTROL MODULE

TIMING CALIBRATION
(J26/P26)
FUEL PRESSURE
(J49/P49) INLET AIR TEMPERATURE
FUEL TEMPERATURE (J88/P88)
(J43/P43)
Right Side View
© 1998 Caterpillar Printed in U.S.A.
All Rights Reserved

CONNECTION LOCATION VIEWS 3176 AND 3196 INDUSTRIAL ENGINES ONLY

CONNECTION LOCATION VIEWS 3456 INDUSTRIAL ENGINE ONLY

INLET AIR TEMPERATURE INLET AIR MANIFOLD PRESSURE

(J88/P88) (J23/P23)

BACKUP SPEED TIMING ATMOSPHERIC PRESSURE FUEL PRESSURE

FUEL TEMPERATURE
(J44/P44) (J27/P27) (J49/P49)
(J43/P43)

Top View
COOLANT PRESSURE
(J21/P21)
ATMOSPHERIC PRESSURE
(J27/P27) OIL PRESSURE

TOP SPEED/TIMING
(J44/P44)
Left Side View

INLET AIR MANIFOLD PRESSURE

(J23/P23)

BOTTOM SPEED/TIMING
ELECTRONIC CONTROL MODULE
Left Side View COOLANT TEMPERATURE
(J20/P20)

(J21/P21)

TIMING CALIBRATION CONNECTOR

(J26/P26)

PRIMARY SPEED/TIMING
(J20/P20) ELECTRONIC CONTROL MODULE

Front Cover
OIL PRESSURE TIMING CALIBRATION
(J22/P22) FUEL PRESSURE (J26/P26)
(J49/P49) FUEL TEMPERATURE
INLET AIR TEMPERATURE
(J43/P43) E25717
Front View (J88/P88)

Right Side View

 MAIN UNIT
OPTIONAL EMS DISPLAY MODULES
(NOTE G)

TACHOMETER QUAD GAGE

(NOTE G) (NOTE G)

15
10 20
OPTIONAL REMOTE
CkPaMILESKMRPMSERV CODE

a x10 5 25 TACHOMETER OR
QUAD GAGE
RPM X100
0 30 (NOTES G & M)

14
15
25
34
35
20
23
13

33

10
11
12
16
17
18
19
21
22
24
26
27
28
29
30
31
32
36
37
38
39
40
1
2
5

7
4

3
6
8
9

1
2
3
4
5
6

1
2
3
4
5
6

1
2
3
4
5
6
7
8
(NOTE F)

4
DATA LINK
3
BOOSTER
2
1
3456 INDUSTRIAL ENGINE ONLY (NOTE P)

TOP SPEED TIMING SENSOR

ECM J44/P44
J1/P1
TOP SPEED/TIMING SENSOR - 1 TOP SPEED/TIMING SENSOR - +24V 1
12 E966-YL
TOP SPEED TIMING/SENSOR + - BAT. 2
TOP SPEED/TIMING SENSOR + 18 E965-BU 2
US/METRIC 3
SCROLL FORWARD 4 (NOTE H)

BOTTOM SPEED TIMING SENSOR CAT DATA LINK - 5

J20/P20 CAT DATA LINK + 6
J2/P2 J26/P26
UNUSED 7
2 1 BOTTOM SPEED/TIMING SENSOR -
BOTTOM SPEED/TIMING SENSOR - (TC PROBE -) 4 F723-PK WARNING LAMP 8
1 2 BOTTOM SPEED/TIMING SENSOR + WARNING 9
BOTTOM SPEED/TIMING SENSOR + (TC PROBE +) 39 F724-BU
BACKLIGHT LAMP PWR 10
SCROLL BACKWARD 11
12 -V OUT +V OUT

(NOTE M)
DC/DC CONVERTER
(NOTES L & M)

-V IN +V IN

P91/J91
L983/WH 12 L983/WH
L984/OR 10 L984/OR
L985/YL 8 L985/YL
A706/GY 6 A706/GY
A705/BU 5 A705/BU
CIRCUITS WITHIN THIS AREA ARE RECOMMENDATIONS
A704/GN 4 A704/GN C OFF
ECM (NOTE M)
A703/BR 3 A703/BR SMMS ON B
A702/PU 2 A702/PU S ST
A701/GY 1 A701/GY
J2/P2 11 R AIR SHUTOFF
INJECTOR COMMON 1 & 2 5 L983/WH 9 SOLENOID
INJECTOR COMMON 3 & 4 17 L984/OR 7 CYL CYL CYL CYL CYL CYL CB
INJECTOR COMMON 5 & 6 27 L985/YL NO.6 NO.5 NO.4 NO.3 NO.2 NO.1 CIS 15A
INJECTOR 6 34 A706/GY P26/J26
INJECTOR 5 28 A705/BU G810/PU 1 G808/BU
A +8V (P19A)
INJECTOR 4 22 A704/GN G811/YL 2 G809/GN
C SIGNAL AUXILIARY
INJECTOR 3 18 A703/BR
15A B RETURN TEMPERATURE SENSOR
INJECTOR 2 12 A702/PU
INJECTOR 1 6 A701/GY +
TC PROBE + 39 G810/PU P88/J88
TC PROBE - 4 G811/YL 997/OR A +5V CB
INLET AIR TEPERATURE SENSOR ALT A +8V (P34)
TC SERVICE PROBE - 10 G809/GN C967/BU C SIGNAL (NOTE B)
G S C SIGNAL COOLANT LEVEL SENSOR
TC SERVICE PROBE + 40 G808/BU 993/BR B RETURN OFF ENGINE
GND B RETURN
ANALOG SNSR POWER (+5V) 36 997/OR MTR BAT
CB
ANALOG SNSR COMMON 30 993/BR J20/P20 (NOTE R) (NOTE D)
INLET AIR TEMP SNSR 2 C967/BU 996/GN A +12V
PRIMARY SPEED/TIMING SENSOR SM
+V ENG SP/TMG 1 996/GN 998/BR B RETURN
A +5V (P19B)
ENG SP/TMG COMMON 29 998/BR 999/WH C SIGNAL
C SIGNAL AUXILIARY
PRIM. SP/TMG SNSR 37 999/WH
B RETURN PRESSURE SENSOR
COOL. TEMP SNSR 14 995/BU J44/P44
BATTERY
TURBO OUTLET PRESS. 23 A746/PK 998/BR B RETURN
BACKUP SPEED/TIMING SENSOR DISCONNECT
ATMOSPHERIC PRESS. SNSR 20 A747/GY 996/GN A +12V
SWITCH
ENG OIL PRESS. SNSR 8 994/GY F732/PK C SIGNAL
(NOTE B) C SIG
FUEL TEMP SNSR 3 F421/YL (P35)
A + BAT.
FUEL PRESS. SNSR 9 413/BR P21/J21 - THROTTLE POSITION
+ B - BAT.
SOLENOID COMMON 7 G969/YL 997/OR A +5V SENSOR
COOLANT TEMPERATURE SENSOR
AIR SHUTOFF SOL 13 G971/BR 995/BU C SIGNAL
UNUSED 19 G970/BU 993/BR B RETURN
AUXILIARY PRESSURE SNSR 15 G469/BU BATTERY
PTO INTERRUPT SW 26 M904/OR J23/P23
AUXILIARY TEMP SNSR 24 G468/GN 997/OR A +5V ETHER
TURBO OUTLET PRESSURE SENSOR J3/P3
MAINTENANCE CLEAR 31 F426/BU A746/PK C SIGNAL VALVE
UNUSED 25 E798/PK 993/BR B RETURN 150/OR 1 +BAT. (UNSWITCHED)
UNUSED 38 E797/WH G971/BR 4 AIR SHUTOFF SOLENOID
UNUSED 11 J27/P27 G969/YL 5 SOLENOID COMMON
TORQUE LIMIT SW 16 M909/GN 997/OR A +5V G468/GN 11 AUXILIARY TEMP SNSR
ATMOSPHERIC PRESSURE SENSOR
UNUSED 21 A747/GY C SIGNAL E452/WH 36 COOLANT LEVEL SNSR STARTING AID SW
UNUSED 32 993/BR B RETURN 167/OR 8 DIG SNSR PWR (+8V)
UNUSED 33 A274/BK 9 DIG SNSR RETURN MAINTENANCE CLEAR SW
UNUSED 35 J22/P22 G469/BU 33 AUXILIARY PRESS. SNSR
997/OR A +5V A307/GY 10 THROTTLE POSITION SNSR TORQUE LIMIT SW
ENGINE OIL PRESSURE SENSOR
994/GY C SIGNAL 125/OR 14 ANLG SNSR PWR (+5V)
J1/P1 993/BR B RETURN A243/BK 15 ANLG SNSR RETURN REMOTE SHUTDOWN SW
BKUP SP/TMG SNSR 18 F732/PK 382/PK 22 ETHER START VALVE RELAY
OVERSPEED VERIFY SW 32 387/PK P43/J43 M910/OR 38 STARTING AID SW INTERMEDIATE SPEED SW
THROTTLE POSITION SNSR 37 A307/GY 997/OR A +5V F426/BU 12 MAINTENANCE CLEAR SW
FUEL TEMPERATURE SENSOR
DIGITAL SNSR RETURN 29 A274/BK F421/YL C SIGNAL M909/GN 2 TORQUE LIMIT SW OVERSPEED VERIFY SW
ANALOG SNSR PWR (5V) 36 125/OR 993/BR B RETURN F716/WH 27 REMOTE SHUTDOWN SW
ANALOG SNSR RETURN 30 A243/BK G968/WH 28 INTERMEDIATE SPEED SW PTO INTERUPT SW
UNUSED 31 M908/YL J49/P49 387/PK 40 OVERSPEED VERIFY SW
UNUSED 38 M905/PU 997/OR A +5V M904/OR 19 PTO INTERRUPT SW PTO ENABLE SW
FUEL PRESSURE SENSOR
PTO ENABLE SW 20 381/PU 413/BR C SIGNAL 381/PU 29 PTO ENABLE SW
WARNING LAMP 27 F420/GN 993/BR B RETURN G970/BU 3 NC
PTO RAMP UP SW 25 G955/GN G955/GN 30 PTO RAMP UP SW
PTO RAMP DOWN SW 15 G967/WH G967/WH 39 PTO RAMP DOWN SW
COOLANT LEVEL SNSR 2 E452/WH F424/YL 13 MAINTENANCE OVERDUE LAMP
(NOTE J) PTO RAMP
REMOTE SHUTDOWN SW 8 F716/WH F404/RD 24 DIAGNOSTIC LAMP
UP/DOWN SWITCH
DIAGNOSTIC LAMP 22 F404/RD F420/GN 25 WARNING LAMP
DIGITAL SNSR POWER (+8V) 35 167/OR NOTE A: THE CUSTOMER CONNECTOR BRACKET GROUND STUD MUST M905/PU 20 NC
NOTE H: THE DEFAULT SETTING FOR THE EMS IS METRIC UNITS. ABBREVIATION
INTERMEDIATE SPEED SW 24 G968/WH HAVE A DIRECT WIRE CONNECTION TO BATTERY (-). THIS 120/YL 26 +BAT. (SWITCHED)
IF METRIC UNITS ARE REQUIRED NO CONNECTION IS NEEDED.
ETHER START VALVE RELAY 34 382/PK 892/BR 6 CAT DATA LINK - MAINTENANCE
CONNECTION CAN BE MADE AT THE STARTER (-) TERMINAL. IF U.S. UNITS ARE REQUIRED, A PERMANENT CONNECTION TO
ALT ALTERNATOR OVERDUE LAMP
STARTING AID SW 13 M910/OR BATTERY (-) IS REQUIRED. 893/GN 7 CAT DATA LINK +
ATA AMERICAN TRUCKING ASSOCIATION
MAINTENANCE OVERDUE LAMP 21 F424/YL NOTE B: TO AVOID LOSS OF JOB DATA STORED BY THE ECM, M903/GN 21 NC
CB CIRCUIT BREAKER
UNUSED 28 M902/OR DISCONNECT SWITCHES SHOULD NOT INTERRUPT EITHER THE ECM NOTE J: 4 AWG WIRE. M902/OR 23 NC DIAGNOSTIC LAMP
CIS CUSTOMER IGNITION SWITCH
UNUSED 40 M903/GN BATTERY (-) OR UNSWITCHED BATTERY (+) LINES. DIG DIGITAL E794/YL 31 ATA DATA LINK +
UNUSED 10 NOTE K: WHEN THE SHUTDOWN SWITCH IS CONNECTED TO BATTERY (-) E793/BU 32 ATA DATA LINK -
ECM ELECTRONIC CONTROL MODULE
NOTE C: MAXIMUM LENGTH OF DATA BUS (TERMINATION RESISTOR THE ECM DISABLES THE FUEL INJECTION SIGNAL. THIS
UNUSED 11 NC NO CONNECTION E797/WH 34 NC MAX LENGTH 1 METER WARNING LAMP
TO TERMINATION RESISTOR) IS 40 METERS. ACTION CAUSES THE ENGINE TO SHUTDOWN WHILE LEAVING MAX LENGTH 0.2 METERS
UNUSED 12 PWM PULSE WIDTH MODULATION E798/PK 35 NC (NOTE M)
THE ECM POWERED TO MONITOR ENGINE DIAGNOSTICS.
UNUSED 14 SM STARTING MOTOR M908/YL 37 NC
NOTE D: PLACE APPROPRIATE CIRCUIT PROTECTION. SMMS
UNUSED 16 START MOTOR MAG SWITCH A234/BK 16 J1939 SHIELD C C
UNUSED 17 NOTE L: 12 VOLT BATTERY SYSTEMS MUST USE THE DC/DC CONVERTER K900/YL 17 J1939 DATA + A A A + BAT.
NOTE E: USE RECOMMENDED CABLE OR EQUIVALENT PER SAE J1939
UNUSED 19 FOR THE EMS TO OPERATE PROPERLY. 24 VOLT SYSTEMS K990/GN 18 J1939 DATA - B B B - BAT.
SPECIFICATIONS FOR ALL J1939 DATA LINK CONNECTIONS.
UNUSED 23 SHOULD CONNECT SWITCHED BATTERY DIRECT TO PINS WIRE CODE C
1 & 2 ON THE 12 PIN EMS HARNESS CUSTOMER CONNECTOR. MAX LENGTH 30 METERS
+BAT. (UNSWITCHED)(NOTE B) 4 150/OR NOTE F: PIN 22 ON THE EMS MAIN MODULE 40 PIN CONNECTOR E CAT DATA LINK -
STD ENGINE HARNESS WIRING
+BAT. (SWITCHED) 6 120/YL MUST BE CONNECTED TO BATTERY (-) FOR PROPER OPERATION. (NOTES E & M) D CAT DATA LINK +
NOTE M: REFER TO THE INSTALLATION GUIDE FOR ADDITION OPTIONAL ATCH WIRING
J1939 SHIELD 26 A234/BK F
NOTE G: ONE MAIN EMS MODULE IS REQUIRED FOR EACH DESIRED MONITORING INSTALLATION DETAILS. CUSTOMER SUPPLIED WIRING DEVICE
J1939 DATA - 39 K990/GN G
STATION. THE TACHOMETER AND/OR QUAD GAGE UNITS ARE A DASHED LINE INDICATES AN OPTIONAL FEATURE NOT AVAILABLE MAX LENGTH 40 METERS
J1939 DATA + 33 K900/YL J ATA DATA LINK +
OPTIONAL AND WILL NOT OPERATE WITHOUT CONNECTION TO ON ALL SYSTEMS.
ATA DATA LINK - 1 E793/BU A MAIN EMS MODULE. H ATA DATA LINK -
NO ADDITIONAL CONNECTIONS ARE ALLOWED TO ANY WIRES
ATA DATA LINK + 7 E794/YL WITHOUT CATERPILLAR ENGINEERING APPROVAL
CAT DATA LINK - 3 892/BR COMPONENTS ARE SHOWN WITH THE KEY OFF. UNLESS OTHERWISE SPECIFIED: (J42)
CAT DATA LINK + 9 893/GN ALL WIRES TO BE 18 AWG OR LARGER SAE J1128 TYPE SXL OR CUST. SUPPLIED ENG
-BAT. 5 229/BK J60 TERMINATION A A A A A A SERVICE TOOL CONN
EQUIVALENT. FOR TWISTED PAIR SPECIFICATION SEE SAE J1708 TERMINATION

120
120
120/YL A +BAT. RESISTOR B B B B B B
ELIMINATION OF ANY COMPONENTS SHOWN WILL DISABLE CERTAIN RESISTOR
229/BK B -BAT. (NOTE C & M) C C C C C C
ENGINE FEATURES. CONTACT CATERPILLAR ENGINEERING WHEN (NOTE C & M)
C NC CONSIDERING COMPONENT REMOVAL.
893/GN D CAT DATA LINK +
892/BR E CAT DATA LINK - NOTE P: APPLIES TO THE 3456 INDUSTRIAL ENGINE ONLY.

GROUND STUD F NC NOTE R: APPLIES TO THE 3176C/3196 AND 3406E INDUSTRIAL ENGINES ONLY.
G NC
E793/BU H ATA DATA LINK -
(NOTE A) E794/YL J ATA DATA LINK +