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2-752
Control System JL4G15-D
Yes
Check air-conditioning working condition.
Step 4
No
Check air intake system, exhaust system.
Step 5
No
Check engine mechanical parts and accessory drive.
Step 6
No
Check ECM power supply circuit.
Step 7
Yes
Step 8
Replace ECM.
EC718/EC718RV EC715/EC715RV 10/2009
(a)
Use scan tool to observe whether the Air-Conditioning
working status is consistent with the actual Air-Conditioning
working condition. Refer to the "Data Stream List".
When the air-conditioning is switched on and the pressure switch
voltage is greater than 0 V, does the idle speed increase by about
150 rpm?
Go to step 7
Yes
(a)
Check exhaust system for the existence of congestion, air
leakage.
(b)
Too much carbon residue in throttle.
Any of these malfunctions?
Repair the faulty parts.
Yes
(a)
Shut down the engine and turn the ignition switch to "OFF".
(b)
Check whether engine accessory drive belt is slack.
(c)
Remove engine accessory belt, neutral gear. Rotate the
engine crankshaft check whether mechanical moving parts
catching.
(d)
Rotate engine accessory pulley and air-conditioning pump.
Check whether engine and other components catching.
Any of these malfunctions?
Repair the faulty parts.
Yes
(a)
Check whether ECM power supply circuit is normal.
(b)
Check whether ECM ground circuit is normal.
Repair the faulty parts.
No
(a)
Replace ECM.
Engine
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