1A-122 Engine Control System (4HK1)
7
Important: The intake throttle position sensor may
be damaged if the sensor signal circuit is shorted to
a voltage source.
1. Test the signal circuit between the ECM (pin
85 of E-12) and the intake throttle valve (pin 5
of E-16) for the following conditions:
• A short to battery or ignition voltage
• A short to any 5 volts reference
2. Repair the circuit(s) as necessary.
Did you find and correct the condition?
—
Go to Step 13 Go to Step 12
8
Notice: The intake throttle position sensor 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 109 of E-12) and the intake throttle
valve (pin 4 of E-16) for an open circuit or high
resistance.
2. Repair the circuit(s) as necessary.
Did you find and correct the condition?
—
Go to Step 13 Go to Step 10
9
1. Inspect for an intermittent and for poor
connections at the harness connector of the
intake throttle valve (pin 4 of E-16).
2. Repair the connection(s) as necessary.
Did you find and correct the condition?
—
Go to Step 13 Go to Step 11
10
1. Turn OFF the ignition.
2. Disconnect the ECM harness connector.
3. Inspect for an intermittent and for a poor
connection at the harness connector of the
ECM (pin 109 of E-12).
4. Repair the connection(s) as necessary.
Did you find and correct the condition?
—
Go to Step 13 Go to Step 12
11
Replace the intake throttle valve. Refer to Intake
Throttle Valve in Section 1B Engine Mechanical.
Did you complete the replacement?
—
Go to Step 13
12
Important: Replacement ECM must be
programmed and learned.
Replace the ECM. Refer to ECM Replacement.
Did you complete the replacement?
—
Go to Step 13
13
1. Reconnect all previously disconnected
harness connector(s).
2. Clear the DTCs with a scan tool.
3. Turn OFF the ignition for 30 seconds.
4. Start the engine.
5. Operate the vehicle within the Conditions for
Running the DTC. You may also operate the
vehicle within the conditions that you
observed from the Freeze Frame/ Failure
Records.
Did the DTC fail this ignition?
—
Go to Step 2 Go to Step 14
Step Action Value(s) Yes No
LG4HKED-WE-0871.book 122 ページ ２００７年１１月２９日 木曜日 午後６時２９分
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