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TM9-2320-360-20-3
Section 4
TROUBLESHOOTING CHARTS
E. FLASHCODE: 15
J1587 CODE:
P110 4 - COOLANT TEMPERATURE CIRCUIT FAILED LOW (LOW VOLTAGE)
OR:
P175 4 - OIL TEMPERATURE CIRCUIT FAILED LOW (LOW VOLTAGE)
STEP/SEQUENCE
RESULT
WHAT TO DO NEXT
15-5 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.
15-6
Check for Short
l Turn ignition off.
l Disconnect engine harness
connector at the ECM.
l Read resistance between sockets
P3 (ckt #133) and Y2 (ckt #452)
on the engine harness connector.
l Also read resistance between
socket B of CTS connector and
a good ground.
15-7
Check for Short
l Turn ignition off.
l Disconnect engine harness
connector at the ECM.
l Read resistance between sockets
R2 (ckt #120) and Y2 (ckt #452)
on the engine harness connector.
l Also read resistance between
socket B of OTS connector and
a good ground.
Terminals and
connectors are okay.
Problem found.
Replace OTS (para 7-34).
Then go to 15-30.
Repair terminals/connectors
(para 7-77). Then go to 15-30.
on either reading.
Signal line (ckt #133) is shorted
to the return line (ckt #452) or
battery ground. Repair short.
Then go to 15-30.
10,000 ohms or open
on both readings.
Go to 15-8.
Less than or
equal to 10,000 ohms
on either reading.
Signal line (ckt #120) is shorted
to the return line (ckt #452) or
battery ground. Repair short.
Then go to 15-30.
Greater than
10,000 ohms or open
on both readings.
Go to 15-9.
H-129
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