Suspect and replace IAC valve
JD22 P1336 CONTINUOUS MEMORY CODE: CHECK CKP CIRCUIT HARNESS Shield Ground
Note: The shield must be grounded at one end (near the PCM) only.
Key off.
Reconnect PCM.
Measure the resistance between battery negative and shield of CKP harness.
Is resistance less than 5 ohms?
Yes
The CKP circuit is not the source of electrical noise.
No
REPAIR open circuit or poor ground connection.
CHECK CMP SENSOR OUTPUT †PCM DISCONNECTED
note: A misfire may occur, and (DTC) P1309 may be output, indicating Misfire Detection Monitor was disabled. The misfire can be disabled by the lack of learning the profile correction, which can be due to CMP faults.
Diagnostic Trouble Code (DTC) P1309 indicates Misfire Detection Monitor is not enabled.
Disconnect PCM.
Connect digital multimeter.
Measure voltage between CMP and PWR GND circuits at the PCM harness connector.
Bump engine in short burst with the starter, without starting engine for at least 10 engine revolutions.
Saturday, October 24th, 2020 AT 1:11 PM
(Merged)