Engine Control System (4HK1) 1A-185
8
1.
Test the signal circuit between the ECM (pin
73 of J-14) and the exhaust temperature
sensor 1 (pin 2 of J-34) for an open circuit or
high resistance.
2.
Repair the circuit(s) as necessary.
Did you find and correct the condition?
—
Go to Step 15
Go to Step 12
9
Notice:
The exhaust temperature sensor 1 shares
the low reference circuit with other sensors. A fault
condition in the low reference circuit may set DTCs
on sensors that share this circuit.
1.
Test the low reference circuit between the
ECM (pin 79 of J-14) and the exhaust
temperature sensor 1 (pin 1 of J-34) for an
open circuit or high resistance.
2.
Repair the circuit(s) as necessary.
Did you find and correct the condition?
—
Go to Step 15
Go to Step 12
10
1.
Test the signal circuit between the ECM (pin
73 of J-14) and the exhaust temperature
sensor 1 (pin 2 of J-34) for a short to any 5
volts reference circuit.
2.
Repair the circuit(s) as necessary.
Did you find and correct the condition?
—
Go to Step 15
Go to Step 11
11
1.
Inspect for an intermittent and for poor
connections at the harness connector of the
exhaust temperature sensor 1 (pins 1 and 2 of
J-34).
2.
Repair the connection(s) as necessary.
Did you find and correct the condition?
—
Go to Step 15
Go to Step 13
12
1.
Turn OFF the ignition.
2.
Disconnect the ECM harness connector.
3.
Inspect for an intermittent and for poor
connections at the harness connector of the
ECM (pins 73 and 79 of J-14).
4.
Repair the connection(s) as necessary.
Did you find and correct the condition?
—
Go to Step 15
Go to Step 14
13
Replace the exhaust temperature sensor 1. Refer
to Exhaust Temperature Sensor in Section 1G
Engine Exhaust.
Did you complete the replacement?
—
Go to Step 15
—
14
Important:
Replacement ECM must be
programmed and learned.
Replace the ECM. Refer to ECM Replacement.
Did you complete the replacement?
—
Go to Step 15
—
Step
Action
Value(s)
Yes
No
LG4HKED-WE-0871.book 185
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２００７年１１月２９日 木曜日 午後６時２９分
