TROUBLE CODE DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
13Ab-9
NOTE: *1 : Minimum value: The test fails if test value is less than this value.
NOTE: *2 : Maximum value: The test fails if test value is greater than this value.
DIAGNOSTIC BY DIAGNOSTIC TEST MODE II
(INCREASED SENSITIVITY)
Required Special Tool:
• MB991502: Scan Tool (MUT-II)
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.
NOTE: When mode II is selected with MUT-II, the Malfunction
Indicator Lamp (SERVICE ENGINE SOON or Check Engine
Lamp) will light when the powertrain control module (PCM) first
detects the trouble (Note that this is only for emission-related
trouble). At the same time, the relevant diagnostic trouble
codes will be registered. In respect to the comprehensive com-
ponent electrical faults (opens/shorts), the time for the diagnos-
tic trouble code to be registered after the fault occurrence is
four seconds " one second. Therefore, the confirmation of the
trouble symptom and the confirmation after completing repairs
can be reduced. To return to the normal mode I after mode II
has been selected once, the ignition switch must be turned
"OFF" once or mode I must be reselected with MUT-II. The
diagnostic trouble code, system readiness test status and
freeze frame data, etc., will be erased when mode I is returned
to, so record these before returning to mode I.
1. Connect scan tool MB991502 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Change the diagnostic test mode of the powertrain control
module to DIAGNOSTIC TEST MODE II (INCREASED
SENSITIVITY).
0A
Heated oxygen
sensor monitor
(Rich/Lean
Switching)
(Bank 2 Sensor
1)
PCM monitors the deteriorated
condition of the heated oxygen
sensor by checking the lean/rich
Switching frequency of the heater
oxygen sensor.
HO2S B2 SENSOR 1
Rich/Lean Switching
Count
Test Result and Limit
Value (min.)
× 1count
0B
Heated oxygen
sensor monitor
(Voltage) (Bank
1 Sensor 2)
PCM checks the output voltage of
the heated oxygen sensor (rear) in
order to monitor whether the heated
oxygen sensor output is stuck.
HO2S B1 SENSOR2
Change in Volt
Test Result and Limit
Value (min.)
× 19.5mV
0C
Heated oxygen
sensor monitor
(Voltage) (Bank
2 Sensor 2)
PCM checks the output voltage of
the heated oxygen sensor (rear) in
order to monitor whether the heated
oxygen sensor output is stuck.
HO2S B2 SENSOR 2
Change in Volt
Test Result and Limit
Value (min.)
× 19.5mV
TEST
ID
MONITORING
ITEM
SIMPLE TECHNICAL
DESCRIPTION
INDICATION OF SCAN
TOOL
CONVERSION
COEFFICIENT IN
USING
GENERAL SCAN
TOOL
ACX01539
16-PIN
MB991502
AC