1998 JAGUAR X308 relay

Pinpoint Tests
f
ailure
P1611Thr

ottle angle malfunction
TP sensor
circuit fault (refer to
P0121)
APP sensor circuit faul
t (refer to
P0121)
Throttl
e assembly failure
ECM failu

re
Se
e pinpoint tests for components
listed. For throttle body information,
REFER to Section 303
-04
Fuel
Charging and Con

trols
.
Contact deal
er technical support for
advice on possible ECM failure.
P1612Throttl
e offset malfunction
TP sensor
circuit fault (refer to
P0121)
APP sensor circuit faul
t (refer to
P0121)
Throttl
e assembly failure
ECM failu

re
Se
e pinpoint tests for components
listed. For throttle body information,
REFER to Section 303
-04
Fuel
Charging and Con

trols
.
Contact deal
er technical support for
advice on possible ECM failure.
P1637CAN AB
S/TCCM token missing
CAN
open circuit fault - ABS/TCCM
to ECM
CAN s
hort circuit fault
ABS/TCCM failu

re
ECM failu

re
F
or network circuit tests,
REFER to Section 418
-00
Module
Comm

unications Network
.
P1638CAN INST token missingCAN

open circuit fault - INST to
ECM
CAN s
hort circuit fault
INST

failure
ECM failu

re
F
or network circuit tests,
REFER to Section 418
-00
Module
Comm

unications Network
.
P1642CAN c

ircuit malfunction
CAN s
hort circuit fault
Control modul

e failure - check for
additional logged DTCs to locate
control module source
F
or network circuit tests,
REFER to Section 418
-00
Module
Comm

unications Network
.
P1643CAN TC

M token missing
CAN
open circuit fault - TCM to
ECM
CAN s
hort circuit fault
TCM failure


ECM failu

re
F
or network circuit tests,
REFER to Section 418
-00
Module
Comm

unications Network
.
P1646F

uel pump 2 relay malfunction.
NOTE: This DTC applies only to
the S/C fuel pump 2
F
uel pump 2 relay failure
F

uel pump 2 relay to ECM circuit
fault
F
uel pump 2 relay coil power
supply open circuit
ECM ground circuit faul
t (relay coil
drive)
F
or fuel pump 2 relay circuit tests,
REFER to Section 303
-04
Fuel
Charging and Con

trols
.
P

INPOINT TEST A : DTC P0101, P0102, P0103; MASS AIR FLOW (MAF) SENSOR
RANGE/PERFORMANCE, HIGH/LOW VOLTAGE
•
NOTE: Before commencing this
test, check the air filter for blockage, the engine air inta ke and breather systems for
leaks, and the TPS for additional DTCs.
TE
ST
CONDITIONS
D
ETAILS/RESULTS/ACTIONS
A1: CHECK

THE MAF SENSOR SENS
E CIRCUIT FOR HIGH RESISTANCE
Di
sconnect the battery negative terminal.
1
D

isconnect the ECM electrical connector, EM12.
2
Di

sconnect the MAF sensor electrical connector, PI35.
3
Meas

ure the resistance between EM12, pin 13 (GY) and PI35, pin 02 (GY).
4
Is th

e resistance greater than 5 ohms?
Yes REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. CLEAR the
DTC. TEST the system for normal operation.
No GO to A2
.
A2: CHECK
THE MAF SENSOR SENSE CI
RCUIT FOR SHORT TO HIGH VOLTAGE
R
econnect the battery negative terminal.
1
Turn the ignition swi

tch to the ON
position.
2
M
easure the voltage between the MAF sensor electrical connector, PI35, pin 02 (GY) and GROUND.
3
Is th

e voltage greater than 3 volts?

Is
the resistance less than 10,000 ohms?
Yes REPAIR the short circuit. For addi tional information, refer to the wiring diagrams. CLEAR the DTC.
TEST the system for normal operation.
No GO to E4
.
E4
: CHECK THE H02S GROUND
CIRCUIT FOR OPEN CIRCUIT
Re
connect the ECM electrical connector, EM12.
1
Meas

ure the resistance between EM21, pin 04 (BRD) and GROUND.
2
Is th

e resistance greater than 5 ohms?
Yes
REPAIR the circuit (this is a braide d lead which would require different repair techniques to standard
wiring). For additional information, refer to the wiring diagrams. CL EAR the DTC. TEST the system for
normal operation.
No INSTALL a new H02S.
REFER to Heated Oxygen Sensor (HO2S) RH

in this section.
CLEAR the DTC. TEST the syst em for normal operation.
PI
NPOINT TEST F : DTC P0133, P0135; RIGHT-HAND H02S HEATER CIRCUIT MALFUNCTION
TE
ST
CONDITIONS
D
ETAILS/RESULTS/ACTIONS
F1:

CHECK THE H02S HEATER POWER SUPPLY CIRCUIT
D

isconnect the H02S electrical connector, EM21.
1
Turn the ignition swi

tch to the ON
position.
2
Meas
ure the voltage between EM21, pin 02 (WP) and GROUND.
3
Is the vol

tage greater than 10 volts?
Yes GO to F2
.
No

REPAIR the circuit. This circuit in cludes the EMS control relay and fu se 14 of the EMS fuse board. For
additional information, refer to the wiring diagrams. CLEAR the DT C. TEST the system for normal
operation.
F2: CHECK THE H02
S HEATER CONTROL CI
RCUIT FROM ECM FOR HIGH RESISTANCE
Di
sconnect the battery negative terminal.
1
D

isconnect the ECM electrical connector, EM15.
2
Me

asure the resistance between EM15, pin 02 (PU) and EM21, pin 01 (PU).
3
Is th

e resistance greater than 5 ohms?
Yes REPAIR the high resistance circui t. For additional information, refer to the wiring diagrams. CLEAR
the DTC. TEST the system for normal operation.
No GO to F3
.
F3: CHECK THE H02
S HEATER CONTROL CIRCUI
T FROM ECM FOR SHORT TO HIGH VOLTAGE
R
econnect the battery negative terminal.
1
Turn the ignition swi

tch to the ON
position.
2
Meas
ure the voltage between EM21, pin 01 (PU) and GROUND.
3
Is th

e voltage greater than 3 volts?
Yes REPAIR the short circuit. For addi tional information, refer to the wiring diagrams. CLEAR the DTC.
TEST the system for normal operation.
No GO to F4
.
F4: CHECK THE H02
S HEATER CONTROL CI
RCUIT FROM ECM FOR SHORT TO GROUND
Turn the ignition swi
tch to the OFF
position.
1
Meas
ure the resistance between EM21, pin 01 (PU) and GROUND.
2
Is

the resistance less than 10,000 ohms?
Yes REPAIR the short circuit. For addi tional information, refer to the wiring diagrams. CLEAR the DTC.
TEST the system for normal operation.
No INSTALL a new H02S.
REFER to Heated Oxygen Sensor (HO2S) RH

in this section.

Yes

REPAIR the high resistance circui t. For additional information, refer to the wiring diagrams. CLEAR
the DTC. TEST the system for normal operation.
No GO to H2
.
H
2: CHECK THE H02S SENSE CIRCUIT FOR SHORT TO HIGH VOLTAGE
R

econnect the battery negative terminal.
1
Turn the ignition swi

tch to the ON
position.
2
M
easure the voltage between EM12, pin 14 (G) and GROUND.
3
Is th

e voltage greater than 3 volts?
Yes REPAIR the short circuit. For addi tional information, refer to the wiring diagrams. CLEAR the DTC.
TEST the system for normal operation.
No GO to H3
.
H
3: CHECK THE H02S SENSE CIRCUIT FOR SHORT TO GROUND
Turn the ignition swi

tch to the OFF
position.
1
Meas
ure the resistance between EM12, pin 14 (G) and GROUND.
2
Is

the resistance less than 10,000 ohms?
Yes REPAIR the short circuit. For addi tional information, refer to the wiring diagrams. CLEAR the DTC.
TEST the system for normal operation.
No GO to H4
.
H4:
CHECK THE H02S GROUND CIRCUIT FOR OPEN CIRCUIT
Re

connect the ECM electrical connector, EM12.
1
Meas

ure the resistance between EM23, pin 04 (BRD) and GROUND.
2
Is th

e resistance greater than 5 ohms?
Yes REPAIR the circuit (this is a braide d lead which would require different repair techniques to standard
wiring). For additional information, refer to the wiring diagrams. CL EAR the DTC. TEST the system for
normal operation.
No INSTALL a new H02S.
REFER to Heated Oxygen Sensor (HO2S) RH

in this section.
CLEAR the DTC. TEST the syst em for normal operation.
P
INPOINT TEST I : DTC P0153, P0155; LEFT-HAND H02S HEATER CIRCUIT MALFUNCTION
TE
ST
CONDITIONS
D
ETAILS/RESULTS/ACTIONS
I

1: CHECK H02S HEATER POWER SUPPLY CIRCUIT
D

isconnect the H02S electrical connector, EM23.
1
Turn the ignition swi

tch to the
ON position.
2
Meas
ure the voltage between EM23, pin 02 (WP) and GROUND.
3
Is the vol

tage greater than 10 volts?
Yes GO to I2
.
No

REPAIR the power supply circuit to the H02S heater. This circuit includes the EMS control relay and
fuse 14 of the EMS fuse board. For additional info rmation, refer to the wiring diagrams. CLEAR the
DTC. TEST the system for normal operation.
I
2: CHECK H02S HEATER CONTROL CIRC
UIT FROM ECM FOR HIGH RESISTANCE
Di
sconnect the battery negative terminal.
1
D

isconnect the ECM electrical connector, EM15.
2
Meas

ure the resistance between EM15,
pin 01 (PS) and EM23, pin 01 (PS).
3
Is th
e resistance greater than 5 ohms?
Yes REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. CLEAR the
DTC. TEST the system for normal operation.
No GO to I3
.
I
3: CHECK H02S HEATER CONTROL CIRCUIT
FROM ECM FOR SHORT TO HIGH VOLTAGE
R
econnect the battery negative terminal.

Yes
GO to N3.
No
CLEAN th
e sensor and whee
l. INSTALL the sensor.
REFER to Camshaft Position (CMP) Sensor
in this
section.
CLEAR the DTCs. TEST the system for normal operation.
O3: CHECK THE CM P SEN
SOR SENS
E CIRCUIT FOR HIGH RESISTANCE
Disc
onnect the battery negative terminal.
1
D
i
sconnect the ECM electrical connector, EM13.
2
Meas
ure t
he resistance between EM13, pin 20 (B) and PI15, pin 01 (B).
3
Is the res

istance greater than 5 ohms?
Yes REPAIR the high resistance circui t. For additional information, refer to the wiring diagrams. CLEAR
the DTC. TEST the system for normal operation.
No GO to O3
.
O4: CHECK THE CM P SEN
SOR SENSE CI
RCUIT FOR SHORT TO HIGH VOLTAGE
Re
connect the battery negative terminal.
1
Turn the ignition swi
t
ch to the ON
position.
2
Me
asure the voltage between EM13, pin 20 (B) and GROUND.
3
Is th
e volt
age greater than 3 volts?
Yes REPAIR the short circuit. For addi tional information, refer to the wiring diagrams. CLEAR the DTC.
TEST the system for normal operation.
No GO to O5
.
O5: CH ECK THE CM
P SENSOR SENSE CIRCUIT FOR SHORT TO GROUND
Turn the ignition swi
t
ch to the OFF
position.
1
Me
asure the resistance between PI15, pin 01 (B) and GROUND.
2
Is
t
he resistance less than 10,000 ohms?
Yes REPAIR the short circuit. For addi tional information, refer to the wiring diagrams. CLEAR the DTC.
TEST the system for normal operation.
No INSTALL a new CMP sensor.
REFER to Camshaft Position (CMP) Sensor
in this
section.
CLEAR the DTC. TEST the system for normal operation.
P I
NPOINT TEST P : DTC P0560; VEHICLE VOLTAGE MALFUNCTION
•
NOTE
: When checking the EMS switched supplies to the ECM
in test P3, the EMS relay must be energized when testing
EM10, pin 01 and EM14, pin 03.
TE S
T
CONDITIONS
D E
TAILS/RESULTS/ACTIONS
P1: CHECK

THE BATTERY POWER SUPPLY TO THE ECM
D
i
sconnect the ECM electrical connector, EM10.
1
Measure the
voltage between EM 10,
pin 09 (NO) and GROUND.
2
Is the vol
t
age greater than 10 volts?
Yes GO to P2
.
No
REPAIR th
e battery power supply circ
uit. This circuit includes fuse 4 of the EMS fuse board. For
additional information, refer to the wiring diagrams. CLEAR the DT C. TEST the system for normal
operation.
P2: CHECK
THE IGNITION SWITCH
ED POWER SUPPLY TO THE ECM
Turn the ignition swit
ch to the
ON position.
1
Meas
ure t
he voltage between EM10, pin 05 (WK) and GROUND.
2
Is the vol
t
age greater than 10 volts?
Yes GO to P3
.
No
REP
AIR the ignition switched power supply circuit. This circuit includes fuse 9 of the right-hand
heelboard fuse box. For a dditional information, refer to the wiri ng diagrams. CLEAR the DTC. TEST the
system for normal operation.

Disc
onnect the battery negative terminal.
1
D
i
sconnect the ECM electrical connectors, EM10 and EM11.
2
Meas
ure t
he resistance between EM10,
pin 20 (BG) and PI42, pin 02 (BG).
3
Measure t
he resistance between EM11,
pin 12 (BG) and PI42, pin 02 (BG).
4
Is either resistance greater
than 5 ohms?
Yes REPAIR the high resistance circui t. For additional information, refer to the wiring diagrams. CLEAR
the DTC. TEST the system for normal operation.
No Check the ECM GROUND circuits. If the GROUND circuits are sound, contact dealer technical
support for advice on possible ECM failure.
PINPOINT TES
T T : DTC P1224, P1229; THROTTLE
CONTROL POSITION SENSOR ERROR/THROTTLE
MOTOR CONTROL CIRCUIT MALFUNCTION
•
NOTE: Before commencing this test, check the TP sensor
connections, perform the throttle adaptions procedure.
TES
T
CONDITIONS
D E
TAILS/RESULTS/ACTIONS
T
1: CH
ECK THE TP SENSOR TO ECM SE
NSE CIRCUIT 1 FOR HIGH RESISTANCE
Disc
onnect the battery negative terminal.
1
Disc
onne
ct the TP sensor electrical connector, PI06.
2
D
i
sconnect the ECM electrical connector, EM11.
3
Me
asure
the resistance between PI06, pin 02 (G) and EM11, pin 10 (G).
4
Is th
e res
istance greater than 5 ohms?
Yes REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. CLEAR the
DTC. TEST the system for normal operation.
No GO to T2
.
T2
: CHECK THE THROTTLE MOTOR RELAY CONSTANT SUPPLY
R
e
connect the battery negative terminal.
1
R
e
move the thrott
le motor relay.
2
Measure t
he voltage between the throttle
motor relay base, pin 3 and GROUND.
3
Is the volt
age greater than 10 volts?
Yes GO to T3
.
No
R
EPAIR the circuit. This ci
rcuit includes the EMS fuse box, fuse 09. For addi tional information, refer to
the wiring diagrams. CLEAR the DTC. TE ST the system for normal operation.
T3
: CHECK THE THROTTLE MOTOR
RELAY EMS SWITCHED SUPPLY
Turn the ignition swit
ch to the
ON position.
1
Meas ure t
he voltage between the throttle
motor relay base, pin 1 and GROUND.
2
Is the volt
age greater than 10 volts?
Yes GO to T4
.
No
REP
AIR the circuit between the throttle motor relay
base, pin 1 and the battery. This circuit includes
the EMS fuse box, fuse 20, and the EMS control relay. For addition al information, refer to the wiring
diagrams. CLEAR the DTC. TEST th e system for normal operation.
T4
: CHECK THE THROTTLE MOTOR RELAY TO
ECM CIRCUIT FOR HIGH RESISTANCE
Turn the ignition swit
ch to the
OFF position.
1
Disc
onnect the battery negative terminal.
2
Di

sconnect the ECM electrical connector, EM13.
3
Measure t

he resistance between EM13, pin 14 (G
R) and throttle motor relay base, pin 2.
4
Is the res
istance greater than 5 ohms?
Yes REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. CLEAR the
DTC. TEST the system for normal operation.
No GO to T5
.
T5
: CHECK THE THROTTLE MOTOR RELAY OUTPUT TO ECM
Re
conn
ect the ECM electrical connector, EM13.
1

D
isconnect the ECM electrical connector, EM14.
2
IN

STALL the throttle motor relay.
3
R

econnect the battery negative terminal.
4
Turn the ignition swi

tch to the
ON position.
5
Measure the
voltage between EM14, pi
ns 01 and 02, (GY) and GROUND.
6
Is the vol
tage greater than 10 volts?
Yes GO to T6
.
No

INSTALL a new throttle motor relay. For additional information, refer to the electrical guide. CLEAR
the DTC. TEST the system for normal operation.
T
6: CHECK THE THROTTLE MOTOR TO ECM DRIVE SUPPLY CIRCUIT FOR HIGH RESISTANCE
Di

sconnect the throttle motor electrical connector, PI33.
1
Meas

ure the resistance between PI33, pi
n 01 (R) and EM14, pins 05 and 06 (R).
2
Is either resi
stance
greater than 5 ohms?
Yes REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. CLEAR the
DTC. TEST the system for normal operation.
No GO to T7
.
T
7: CHECK THE THROTTLE MOTOR TO ECM DRIVE GROUND CIRCUIT FOR HIGH RESISTANCE
Meas

ure the resistance between PI33, pin
02 (G) and EM14, pins 11 and 12 (G).
1
Is either resi
stance
greater than 5 ohms?
Yes REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. CLEAR the
DTC. TEST the system for normal operation.
No GO to T8
.
T
8: CHECK THE THROTTLE MOTOR TO ECM DRIVE SU
PPLY CIRCUIT FOR SHORT TO HIGH VOLTAGE
Re
connect the ECM electrical connector, EM14.
1
Turn the ignition swi

tch to the
ON position.
2
M
easure the voltage between PI33, pin 01 (R) and GROUND.
3
Is the vol

tage greater than 10 volts?
Yes REPAIR the short circuit. For addi tional information, refer to the wiring diagrams. CLEAR the DTC.
TEST the system for normal operation.
No GO to T9
.
T
9: CHECK THE THROTTLE MOTOR TO ECM DRIVE SUPPLY CIRCUIT FOR SHORT TO GROUND
D

isconnect the ECM electrical connector, EM14.
1
Turn the ignition swi

tch to the
OFF position.
2
Meas
ure the resistance between PI33, pin 01 (R) and GROUND.
3
Is

the resistance less than 10,000 ohms?
Yes REPAIR the short circuit. For addi tional information, refer to the wiring diagrams. CLEAR the DTC.
TEST the system for normal operation.
No INSTALL a new throttle motor.
REFER to Section 303
-0
4 Fuel Charging and Controls
.
CLEAR t
he DTC. TEST the system for normal operation.
P

INPOINT TEST U : DTC P1226; MECHANICAL
GUARD SENSOR RANGE/PERFORMANCE, HIGH /LOW
VOLTAGE
TE
ST
CONDITIONS
D
ETAILS/RESULTS/ACTIONS
U1: CHECK T

HE MECHANICAL GUARD SENSE CIRCUIT FOR HIGH RESISTANCE
Di

sconnect the battery negative terminal.
1
Di

sconnect the mechanical guard sensor electrical connector, PI42.
2
D

isconnect the ECM electrical connector, EM11.
3
Me

asure the resistance between PI42, pin 01 (BY) and EM11, pin 13 (BY).
4
Is th

e resistance greater than 5 ohms?

Is the res
istance greater than 5 ohms?
Yes GO to W10
.
No
GO to W11
.
W10 :
CHECK THE IAT SENSOR REFERENCE
GROUND CIRCUIT FOR HIGH RESISTANCE
Di
sconnect the ECM electrical connectors, EM10 and EM11.
1
Meas
ure t
he resistance between PI35,
pin 04 (BG) and EM10, pin 20 (BG).
2
Measure t
he resistance between PI35,
pin 04 (BG) and EM11, pin 12 (BG).
3
Is either resistance greater
than 5 ohms?
Yes REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. CLEAR the
DTC. TEST the system for normal operation.
No GO to W11
.
W11 :
CHECK THE SENSOR REFERENCE GROUND AT THE IAT SENSOR #2
Re
conn
ect the ECM electrical connectors, EM10 and EM11.
1
Di
sc
onnect the IAT sensor 2 electrical connector, PI03.
2
Meas
ure t
he resistance between PI03, pin 01 (BG) and GROUND.
3
Is th
e res
istance greater than 5 ohms?
Yes GO to W12
.
No
CHECK
for DTCs associated with TP sensor, APP/
mechanical guard sensor, FTP sensor, ECT sensor,
IAT sensor, or IAT sensor 2. INST ALL a new sensor as indicated by the DTC. CLEAR the DTC. TEST
the system for normal operation.
W12 :
CHECK THE IAT SENSOR #2 REFERENC
E GROUND CIRCUIT FOR HIGH RESISTANCE
Di
sconnect the ECM electrical connectors, EM10 and EM11.
1
Meas
ure t
he resistance between PI03,
pin 01 (BG) and EM10, pin 20 (BG).
2
Measure t
he resistance between PI03,
pin 01 (BG) and EM11, pin 12 (BG).
3
Is either resistance greater
than 5 ohms?
Yes REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. CLEAR the
DTC. TEST the system for normal operation.
No CHECK for DTCs associated with TPS, APP/mechanical guard sensor, FTP sensor, ECT sensor, IAT
sensor, or IAT sensor #2. INSTALL a new sensor as indicated by the DTC. CLEAR the DTC. TEST the
system for normal operation.
PINPO
INT TEST X : DTC P1245, P1246; ENGINE CRANK SIGNAL LOW/HIGH VOLTAGE
TE
S
T
CONDITIONS
D E
TAILS/RESULTS/ACTIONS
X
1
: CHECK THE STARTER RELAY SIGNAL CIRC
UIT FROM ECM AND BPM FOR SHORT TO B+
Re
move the starter relay.
1
Meas
ure t
he voltage between the
relay base, pin 02 and GROUND.
2
Is the volt
age greater than 3 volts?
Yes REPAIR the short circuit. For addi tional information, refer to the wiring diagrams. CLEAR the DTC.
TEST the system for normal operation.
No GO to X2
.
X2
: CHECK THE STARTER RELAY SIGNAL CIRCUI
T FROM ECM AND BPM FOR HIGH RESISTANCE
Di
sconnect the ECM electrical connector, EM11.
1
Disc
onne
ct the BPM electrical connector, FC15.
2
Meas
ure t
he resistance between EM11, pin 06
(GO) and the starter relay base, pin 02.
3
Measure t
he resistance between FC15, pin 73
(GO) and the starter relay base, pin 02.
4
Is either resistance greater
than 5 ohms?
Yes REPAIR the high resistance circui t. For additional information, refer to the wiring diagrams. CLEAR
the DTC. TEST the system for normal operation.
No INSTALL a new BPM. CLEAR the DTC. TEST the system for normal operation.

P
INPOINT TEST Y : DTC P1260; SECURITY INPUT MALFUNCTION
TE
ST
CONDITIONS
D
ETAILS/RESULTS/ACTIONS
Y1

: CHECK THE KTM TO ECM CIRCUIT FOR HIGH RESISTANCE
D

isconnect the ECM electrical connector, EM10.
1
D

isconnect the KTM electrical connector, FC22.
2
Me

asure the resistance between EM10, pin 06 (O) and FC22, pin 16 (O).
3
Is th

e resistance greater than 5 ohms?
Yes REPAIR the high resistance circui t. For additional information, refer to the wiring diagrams. CLEAR
the DTC. TEST the system for normal operation.
No INSTALL a new KTM. CLEAR the DTC. TEST the system for normal operation.
PINPO
INT TEST Z : DTC P1474; INTERCOOLER COOLANT PUMP RELAY MALFUNCTION
•
NOTE: Early production vehicl
es have connector pin numbers that differ fro m the volume production pin numbers shown.
Use the wire color code for pin identifi cation on early production vehicles.
TE
ST
CONDITIONS
D
ETAILS/RESULTS/ACTIONS
Z1

: CHECK THE INTERCOOLER PUMP RELAY TO ECM DRIVE CIRCUIT FOR HIGH RESISTANCE
Di

sconnect the battery negative terminal.
1
R

emove the intercooler pump relay.
2
D

isconnect the ECM electrical connector, EM13.
3
Meas

ure the resistance between the rela
y base, pin 01 and EM13, pin 10 (RY).
4
Is th
e resistance greater than 5 ohms?
Yes REPAIR the high resistance circui t. For additional information, refer to the wiring diagrams. CLEAR
the DTC. TEST the system for normal operation.
No GO to Z2
.
Z2
: CHECK THE INTERCOOLER PUMP RELAY TO EC
M DRIVE CIRCUIT FOR SHORT TO HIGH VOLTAGE
R
econnect the battery negative terminal.
1
Turn the ignition swi

tch to the ON
position.
2
Meas
ure the voltage between the
relay base, pin 01 and GROUND.
3
Is th
e voltage greater than 3 volts?
Yes REPAIR the short circuit. For addi tional information, refer to the wiring diagrams. CLEAR the DTC.
TEST the system for normal operation.
No GO to Z3
.
Z3
: CHECK THE INTERCOOLER PUMP RELAY TO
ECM DRIVE CIRCUIT FOR SHORT TO GROUND
Turn the ignition swi
tch to the OFF
position.
1
Meas
ure the resistance between th
e relay base, pin 01 and GROUND.
2
Is
the resistance less than 10,000 ohms?
Yes
REPAIR the short circuit. For addi tional information, refer to the wiring diagrams. CLEAR the DTC.
TEST the system for normal operation.
No GO to Z4
.
Z4: CHECK THE INTER
COOLER PUMP RELAY GROUND CIRCUIT
Meas

ure the resistance between th
e relay base, pin 02 and GROUND.
1
Is th
e resistance greater than 5 ohms?
Yes REPAIR the high resistance circui t. For additional information, refer to the wiring diagrams. CLEAR
the DTC. TEST the system for normal operation.
No INSTALL a new intercooler pump re lay. CLEAR the DTC. TEST the system for normal operation.
P
INPOINT TEST AA : DTC P1475; RADIATOR
FANS SLOW (SERIES) CIRCUIT MALFUNCTION
TE
ST
CONDITIONS
D
ETAILS/RESULTS/ACTIONS