13A-8
MPI – TROUBLESHOOTING
Continued from the previous page
Measurements taken at the B-135
MAP sensor connector
• Connect the test harness
(MB991348) to the connector
and measure at the pick-up
harness component.
• Ignition switch: ON
•Voltage across earth at 2
OK: 4.9~5.1V
Measurements taken at the B-135
MAP sensor connector
• Connect the test harness
(MB991348) to the connector
and measure at the pick-up
harness component.
• Ignition switch: ON
•Voltage across earth at 1
OK: altitude 0m 1.2~1.8V
altitude 600m 1.1~1.7V
altitude 1200m 1.0~1.6V
altitude 1800m 0.9~1.5V
Measurements taken at the C-50
engine ECU connector
• Measure engine ECU terminal
voltage
• Ignition switch: ON
•Voltage across earth at 92
OK: altitude 0m 1.2~1.8V
altitude 600m 1.1~1.7V
altitude 1200m 1.0~1.6V
altitude 1800m 0.9~1.5V
MUT-II/III service data
• No.95: MAP sensor
(Ref: P13A-24)
Replace the engine ECU
Check connector C-50
Check connector C-50
Inspect the harness between the
MAP sensor and the engine ECU,
repair if necessary.
• Check for damage to the power
supply wire.
Check connector C-50
Inspect the harness between the
MAP sensor and the engine ECU.
• Check if the output wire has
short circuited.
Replace the MAP sensor
Check connector C-50
Inspect the harness between the
MAP sensor and the engine ECU,
repair if necessary
• Check if the output wire has
been cut or damaged.
Temporary malfunction (Ref
Section 00: Dealing with
temporary malfunctions)
OK
OK
OK
OK
OK
NG
Repair
OK
OK
OK
OK
NG
NG
NG
NG
NG
OK
NG
Repair
NG
NG
Repair
Repair
Repair
