6E1-20
ENGINE AND EMISSION CONTROL SYSTEM
CODE NO.11 (P0105) MAP SENSOR CIRCUIT
(SIGNAL VOLTAGE LOW, HIGH OR PERFORMANCE PROBLEM)
NOTE:
When Code No.11 (P0105), 13 (P0120), 18 (P0110) and
19 (P0115) are indicated together, it is possible that
“B/G” wire is open or “E34-22” terminal connections
are poor.
1. ECM
2. ECM coupler
3. MAP sensor
4. MAP sensor coupler
5. To TP sensor
6. To other sensors
STEP
ACTION
YES
NO
1
1) Disconnect MAP sensor coupler with igni-
tion switch OFF.
2) Check voltage between “c” wire terminal of
MAP sensor coupler and ground with igni-
tion switch ON.
Is voltage about 4 – 5 V?
Go to Step 2.
“Lbl” wire open or short.
Poor “E33-201” connection.
If wire and connection are OK,
substitute a known-good ECM
and recheck.
2
1) Check voltage between “a” wire terminal of
MAP sensor coupler and ground with igni-
tion switch ON.
Is voltage about 4 – 5 V?
Go to Step 3.
“Lg/R” wire open or short.
Poor “E33-205” connection.
If wire and connection are OK,
substitute a known-good ECM
and recheck.
3
1) Connect “a” and “b” wire terminals of MAP
sensor coupler using service wire.
2) Check voltage between “Lg/R” wire termi-
nal of MAP sensor coupler and ground.
Is voltage about 0 V?
Go to Step 4.
“B/G” wire open.
Poor “E34-22” connection.
If wire and connection are OK,
substitute a known-good ECM
and recheck.
4
1) Remove MAP sensor.
2) Visually inspect air pressure inlet passage
of MAP sensor for clogging.
Is there any blockage?
Clean air passage or
replace as necessary.
Go to Step 5.
5
1) Perform MAP SENSOR INSPECTION in
this section.
Is MAP sensor in good condition?
Poor connection of
MAP sensor coupler
terminals.
If connection is OK,
substitute a known-
good ECM and re-
check.
Faulty MAP sensor.
