Mazda MX-6 1998, Workshop Manual

Page: 563 / 1282

CONTROL SYSTEM [KL]
7. If not as specified, perform the following
inspection.
HARNESS SIDE CONNECTOR
(VIEW FROM VEHICLE HARNESS CONNECTOR)
W 6 U 1 4 0 W N K
(1) Harness continuity
• Between PCM terminal 91 and fuel tank
pressure sensor terminal A
• Between PCM terminal 62 and fuel tank
pressure sensor terminal B
• Between PCM terminal 90 and fuel tank
pressure sensor terminal C
(2) If there is no continuity, repair or replace
related harness.
(3) Terminal voltage (Ignition switch ON)
• Fuel tank pressure sensor terminal A voltage:
Ground (Below 1.0 V)
• Fuel tank pressure sensor terminal C voltage:
Constant voltage (4.5— 5.5 V)
(4) If terminal voltage is incorrect, check the
PCM.
8. If terminal voltage is correct and if there is
harness continuity, replace the fuel tank pressure
sensor.
POWER STEERING PRESSURE SWITCH INSPECTION [KL]
Inspection of Output Voltage
1. If the SST (104 Pin Breakout Box) are used,
check in the following order.
(1) Remove the PCM. (Refer to 01-40B
POWERTRAIN CONTROL MODULE (PCM)
REMOVAL/INSTALLATION [KL].)
(2) Connect the SST (104 Pin Breakout Box) to
the PCM as shown.
W 6 U 1 4 O W N 0
(3) Tighten the connector bolt.
Tightening torque
7.9— 10.7 N m
(80— 100 kgf-cm, 69.5— 95.4 inlbf}
(4) Warm up the engine to normal operating
temperature.
(5) Turn the ignition switch to ON.
(6) Measure the voltage at PCM terminal
31.
Specification
Steering wheel condition
PCM terminal
31
voltage (V)
Steering wheel fully turned
B+
Steering wheel straight
ahead position
Below 1.0
W 6 U 1 4 0 W 0 T
2. If the SSTs (NGS tester) are used, check in the
following order.
(1) Connect the SSTs (NGS tester) to the data
link connector.
(2) Warm up the engine to normal operating
temperature.
(3) Turn the ignition switch to ON.
(4) Select the “ PID/DATA MONITOR AND
RECORD” function on the NGS tester display
and press TRIGGER.
(5) Select “ PSP” on the NGS tester display and
press START. The NGS tester measures and
shows the operation.
Specification
Steering wheel condition “PSP” operation (V)
Steering wheel fully turned OFF
Steering wheel straight
ahead position
ON
(6) If not as specified, check the related harness
and power steering pressure switch continuity.
(7) If not as specified, check the related harness
and power steering pressure switch continuity.
0 1 -4 0 B -2 8