Mitsubishi Montero (2002-2004). Manual - part 635
TSB Revision
DIAGNOSTIC TROUBLE CODE PROCEDURES
13Ac-237
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are: )
• Left bank heated oxygen sensor (rear) failed.
• Open circuit in left bank heated oxygen sensor
(rear) output line.
• Open circuit in left bank heated oxygen sensor
(rear) ground line.
• PCM failed.
DIAGNOSIS
Required Special Tools:
• MB991502: Scan Tool (MUT-II)
• MD998464: Test Harness
STEP 1. Using scan tool MB991502, check data list item 59:
Left Bank Heated Oxygen Sensor Bank 2, Sensor 2 (left
rear).
CAUTION
To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Start the engine and run at idle.
(3) Set scan tool MB991502 to the data reading mode for item
59, Heated Oxygen Sensor Bank 2, Sensor 2 (left rear).
• Warming up the engine. When the engine is revved, the
output voltage should repeat 0 volt and 0.6 to 1.0 volt
alternately.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?
YES : It can be assumed that this malfunction is intermittent.
Refer to GROUP 00, How to Use Troubleshooting/
Inspection Service Points
NO : Go to Step 2.
ACX01539
16-PIN
MB991502
AC