Engine Control System (4HK1) 1A-195
4
1. Connect a test lamp between the control
circuit (pin 2 of J-26) and battery voltage.
2. Perform the Exhaust Brake Control with a
scan tool.
3. Command the solenoid valve ON and OFF.
Does the test lamp turn ON and OFF with
each command?
—
Go to Step 9 Go to Step 5
5
Does the test lamp remain illuminated with
each command?
—
Go to Step 8 Go to Step 7
6
Repair the open circuit or high resistance between
the ECM (10A) fuse and the solenoid valve (pin 1 of
J-26). Check the ECM (10A) fuse first.
Did you complete the repair?
—
Go to Step 13
—
7
1. Test the control circuit between the ECM (pin
15 of J-14) and the solenoid valve (pin 1 of J-
26) 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
8
1. Test the control circuit between the ECM (pin
15 of J-14) and the solenoid valve (pin 1 of J-
26) for a short to ground.
2. Repair the circuit(s) as necessary.
Did you find and correct the condition?
—
Go to Step 13 Go to Step 12
9
1. Inspect for an intermittent and for poor
connections at the harness connector of the
solenoid valve (pins 1 and 2 of J-26).
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 harness connector of the ECM
(pin 15 of J-14).
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 exhaust brake control solenoid valve.
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 fuse or
harness connector(s).
2. Clear the DTCs with a scan tool.
3. Turn OFF the ignition for 30 seconds.
4. Turn ON the ignition, with the engine OFF.
5. Monitor the DTC Information with a scan tool.
Did the DTC fail this ignition?
—
Go to Step 3 Go to Step 14
Step Action Value(s) Yes No
LG4HKED-WE-0871.book 195 ページ ２００７年１１月２９日 木曜日 午後６時２９分
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