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TM9-2320-360-20-3
Section 4
TROUBLESHOOTING CHARTS
E. FLASHCODE:
14
J1587 CODE:
P110 3 - COOLANT TEMPERATURE CIRCUIT FAILED HIGH (VOLTAGE HIGH)
(BELOW)
OR: P175 3 - OIL TEMPERATURE ClRCUIT FAlLED HIGH (VOLTAGE HIGH) (BELOW)
NOTE - This chart is only to be used if:
1) All basic mechanical checks and physical inspections have been performed with no problem found, and
2) Diagnosis of DDEC-III was started at step START-1, pg H-25 and you have now been referred here.
STEP/SEQUENCE
14-1 Code Check
l Turn ignition on.
l Plug in DDR and determine which
code is present.
14-2
Coolant Temp Sensor
Check
l Turn ignition off.
l Disconnect CTS and install
a jumper between the CTS
connector sockets A and B.
l Turn ignition on.
l Read active codes.
14-3
Oil Temp Sensor
Check
l Turn ignition off.
l Disconnect OTS and install
jumper between OTS connector
sockets A and B.
l Turn ignition on.
l Read active codes.
14-4
Check for Short to
+5 Volt Line
l Turn ignition off.
l Remove jumper wire.
l Disconnect the engine harness
connector at the ECM.
l Read resistance between sockets
P3 ( ckt #133) and W1 (ckt #416)
on the engine harness connector.
RESULT
WHAT TO DO NEXT
PID 110 - FMI 3
Go to 14-2.
PID 175 - FMI 3
Go to 14-3.
Code 110/4 (or any codes
except Code 110/3).
Go to 14-4.
Anything except
Code 110/4.
Go to 14-8.
Code 175/4 (or any codes
except Code 175/4).
Go to 14-5.
Anything except
Code 175/4.
Go to 14-9.
Less than or equal to
10,000 ohms.
Greater than 10,000
ohms or open.
Signal line (ckt #133) is shorted
to the engine +5 volt line (ckt
#416), and/or (ckt #133) signal
line is shorted to ground and/or
sensor return (ckt #452). Repair
short. Then go to 14-30.
Go to 14-6.
H-121
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