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TM9-2320-360-20-3
Section 4
TROUBLESHOOTING CHARTS
E. FLASH CODE:
14
J1587 CODE:
P110 3 - COOLANT TEMPERATURE CIRCUIT FAILED HIGH (VOLTAGE HIGH)
OR:
P175 3 - OIL TEMPERATURE CIRCUIT FAILED HIGH (VOLTAGE HIGH)
STEP/SEQUENCE
14-5
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
R2 (ckt #120) and W1 (ckt #416)
on the engine harness connector.
14-6
Check CTS
Connectors
l Inspect terminals at the
CTS connector (both the sensor
and harness side) for damage;
bent, corroded, and unseated
pins or sockets.
14-7
Check OTS
Connectors
l Inspect terminals at the OTS
connector (both the sensor
and harness side) for damage;
bent, corroded, and unseated
pins or sockets.
14-8 Open line Check
l Turn ignition off.
l Disconnect the engine harness
connector at the ECM.
l Read resistance between sockets
P3 (ckt #133) and Y2 (ckt #452)
on the engine harness connector.
RESULT
WHAT TO DO NEXT
Less than or equal to
10,000 ohms.
Signal line (ckt #120) is shorted
to the engine +5 volt line (ckt
#416), and/or (ckt #120) signal
line is shorted to ground and/or
sensor return (ckt #452). Repair
short. Then go to 14-30.
Greater than 10,000
Go to 14-7.
ohms or open.
Terminals and
Replace CTS (para 7-36.1).
Then go to 14-30.
Problem found.
Repair terminals/connectors
(para 7-77). Then go to 14-30.
Terminals and
connectors are okay.
Problem found.
Replace OTS (para 7-34).
Then go to 14-30.
Repair terminals/connectors
(para 7-77). Then go to 14-30.
Go to 14-10.
Signal line (ckt #133) or return
line (ckt #452) is open. Repair
open. Then go to 14-30.
H-123
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