1A-120 Engine Control System (4HK1)
5
Connect a 3-amp fused jumper wire between the 5
volts reference circuit and the signal circuit (pins 5
and 6 of E-16).
Is the Intake Throttle Position Sensor
parameter more than the specified value?
4.5 volts
Go to Step 8 Go to Step 7
6
Notice: The intake throttle position sensor shares
the 5 volts reference circuit with other sensors. A
fault condition in the 5 volts reference circuit may
set DTCs on sensors that share this circuit.
1. Test the 5 volts reference circuit between the
ECM (pin 95 of E-12) and the intake throttle
valve (pin 5 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 12 Go to Step 9
7
1. Test the signal circuit between the ECM (pin
85 of E-12) and intake throttle valve (pin 6 of
E-16) for the following conditions:
• An open circuit
• A short to ground
• A short to the low reference circuit
• High resistance
2. Repair the circuit(s) as necessary.
Did you find and correct the condition?
—
Go to Step 12 Go to Step 9
8
1. Inspect for an intermittent and for poor
connections at the harness connector of the
intake throttle valve (pins 5 and 6 of E-16).
2. Repair the connection(s) as necessary.
Did you find and correct the condition?
—
Go to Step 12 Go to Step 10
9
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 (pins 85 and 95 of E-12).
4. Repair the connection(s) as necessary.
Did you find and correct the condition?
—
Go to Step 12 Go to Step 11
10
Replace the intake throttle valve. Refer to Intake
Throttle Valve in Section 1B Engine Mechanical.
Did you complete the replacement?
—
Go to Step 12
—
11
Important: Replacement ECM must be
programmed and learned.
Replace the ECM. Refer to ECM Replacement.
Did you complete the replacement?
—
Go to Step 12
—
Step Action Value(s) Yes No
LG4HKED-WE-0871.book 120 ページ ２００７年１１月２９日 木曜日 午後６時２９分
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