Cooling Fan Relay - Triumph T595 DAYTONA Service Manual

9
FUEL SYSTEM/ENGINE MANAGEMENT

COOLING FAN RELAY

Fault Code
P1 551
P1552
P1553
Pinpoint Tests
Test
1 Check cable and terminal integrity:
— ECM pin 25
2 Check cable for short circuit:
— ECM pin 25 to earth
3 Check cable continuity:
— Relay pin 4 to ECM pin 25
— Relay pin 6 to ECM relay pin 8
4 Check cable for short circuit:
— ECM pin 25 to ECM pin 1
5 Reconnect harness, clear fault code and
run diagnostic tool function test to visually
verify operation of cooling fan
Circuit Diagram
Possible cause
Cooling fan relay system fault
Open circuit, or short circuit to earth
Short circuit to battery+
Result
OK
Faulty
OK
Short circuit
OK
Open circuit
OK
Short circuit
OK
Fault still present
ECM Main
Power Relay
N
Fusebox
8
5
uB
a
Action
View & note diagnostic tool `sensor' data.
Ensure relay connector is secure and relay
is operational — renew if faulty.
Disconnect ECM and proceed to pinpoint
testl:-
Disconnect relay and proceed to pinpoint
test 4
Action
Disconnect relay and proceed to test 2
Rectify fault, proceed to test 5
Proceed to test 3
Locate and rectify wiring fault, proceed to
test 5
Proceed to test 4
Locate and rectify wiring fault, proceed to
test 5
Proceed to test5
Locate and rectify wiring fault, proceed to
test 5
Action complete — quit test
Contact Triumph service
Cooling Fan
''F— '
B 2
Cooling Fan
a s
[° 1J 6 6
y Z
a a
UB z m W
Y }
Z
m
9.72
TJIUM1 MPII
Relay
Engine
Control
Module