1A-154 Engine Control System (4HK1)
12
Important: The CKP sensor may be damaged if
the sensor signal circuit is shorted to a voltage
source.
1. Test the signal circuit between the ECM (pin
107 of E-12) and the CKP sensor (pin 1 of E-
20) for a short to battery or ignition voltage.
2. Repair the circuit(s) as necessary.
Did you find and correct the condition?
—
Go to Step 19 Go to Step 18
13
1. Test the signal circuit between the ECM (pin
107 of E-12) and the CKP sensor (pin 1 of E-
20) for a short to any 5 volts reference.
2. Repair the circuit(s) as necessary.
Did you find and correct the condition?
—
Go to Step 19 Go to Step 18
14
1. Inspect for an intermittent and for poor
connections at the harness connector of the
CKP sensor (pins 1, 2 and 3 of E-20).
2. Repair the connection(s) as necessary.
Did you find and correct the condition?
—
Go to Step 19 Go to Step 16
15
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 95, 107, 108 and 109 of E-12).
4. Repair the connection(s) as necessary.
Did you find and correct the condition?
—
Go to Step 19 Go to Step 18
16
1. Inspect the CKP sensor and sensor rotor for
the following conditions:
• Physical damage of sensor
• Loose or improper installation of sensor
• Excessive air gap
• Foreign material passing between sensor
and sensor rotor
• Physical damage of sensor rotor
• Loose or improper installation of sensor
rotor
2. Repair or replace as necessary.
Did you find and correct the condition?
—
Go to Step 19 Go to Step 17
17
Replace the CKP sensor. Refer to CKP Sensor in
Section 1B Engine Mechanical.
Did you complete the replacement?
—
Go to Step 19
—
18
Important: Replacement ECM must be
programmed and learned.
Replace the ECM. Refer to ECM Replacement.
Did you complete the replacement?
—
Go to Step 19
—
Step Action Value(s) Yes No
LG4HKED-WE-0871.book 154 ページ ２００７年１１月２９日 木曜日 午後６時２９分
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