MazdaTesting.pdf

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Chapter 12
Mazda
This chapter contains information for testing Mazda vehicles with the Asian Import Vehicle
Communication Software (VCS). The following Mazda systems may be available for testing:
•
•
•
•
•
•
•
Engine
Transmission
Antilock Brake System (ABS)
Airbag
Generic Electronic Module (GEM)
Instrument Cluster Module (ICM)
Transfer Case
12.1 Testing Engine and Transmission Systems
Mazda engine and transmission system testing includes:
•
“Code Reading”
•
“Manual Code Reading”
•
“Functional Tests—All 1983–95 models except: 1991–94 Navajo; 1994 B-Series;
and 1994–95 626 2.0L ATX”
•
“Functional Tests—All models with EEC-IV and EEC-V systems”
•
“Transmission Code Retrieval—1987 626”
12.1.1 Code Reading
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To read codes from vehicles with a 16-pin connector:
•
Use the OBD-II adapter with the specified Personality Key™ device (Figure 12-1).
Figure 12-1
16-pin connector and OBD-II adapter with Personality Key™ device
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Chapter 12
Testing Engine and Transmission Systems
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To read engine and transmission codes from a 17-pin underhood connector:
•
Connect the MAZDA-1 adapter to the 17-pin connector (Figure 12-2). For reading codes
manually, ground one of the following pins:
–
TEN = Engine codes
–
TAT = Transmission codes (most cars)
IMPORTANT:
Grounding the incorrect pin may result in vehicle damage.
FEN MEN
GND FAT FBS FAC
TAT TBS TAC
TEN B+
FSC
TSC
IGÐ GND
F/P
Figure 12-2
17-pin underhood connector and MAZDA-1 adapter
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To read codes from vehicles with 6-pin and 1-pin connectors:
•
Use the MULTI-2-B + 2E adapter (Figure 12-3).
2E
2B
Figure 12-3
6-pin and 1-pin connectors and MULTI-2 adapter
IMPORTANT:
When connecting to a vehicle with the above configuration, make sure the 1-pin connector is
properly identified. Failure to identify the right connector may result in scan tool damage.
NOTE:
Some vehicles retrieve transmission codes from the engine control module (ECM).
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12.1.2 Manual Code Reading
Refer to Figure 12-4 for reading manual codes.
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1.2 Sec.
On
1.6
Sec.
0.4 Sec.
4.0 Second
Code Separaton
Off
First Digit
(2)
Second Digit
(3)
Code 23
1
Code 12
2
Figure 12-4
Mazda engine, transmission, and ABS flash codes
12.1.3 Functional Tests—All 1983–95 models except: 1991–94
Navajo; 1994 B-Series; and 1994–95 626 2.0L ATX
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NOTE:
Operations described in this section are not available on all tool platforms.
The following Functional Tests may be available for 1983–95 Mazda vehicles (Figure 12-5):
•
OXYGEN SENSOR TEST—monitors
the feedback signal from the exhaust gas oxygen
sensor (O2S).
•
SWITCH TEST—checks
certain switch circuits.
•
BASE TIMING CHECK—commands
the ECM to place the engine in the base timing
mode for ignition timing checks and adjustments.
FUNCTIONAL TEST MENU:
>OXYGEN SENSOR TEST
SWITCH TEST
BASE TIMING CHECK
Figure 12-5
Sample Mazda Functional Tests menu
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To perform an oxygen sensor test:
1. From the Functional Tests menu, select
OXYGEN SENSOR TEST.
A screen like Figure 12-6 displays.
MAKE SURE ENGINE IS RUNNING AND WARM
(IN CLOSED LOOP) BEFORE MONITORING THE
EXHAUST OXYGEN CONTENT.
PRESS Y TO CONTINUE
Figure 12-6
OXYGEN SENSOR TEST selected
2. Start and run the engine to warm it to normal operating temperature.
3. Press
Y.
A screen like Figure 12-7 displays.
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Chapter 12
Testing Engine and Transmission Systems
HOLD ENGINE AT 2000 RPM TO MONITOR
EXHAUST OXYGEN SENSOR.
........................................
EXHAUST_________LEAN
Figure 12-7
Oxygen Sensor Test
4. As instructed, accelerate the engine to 2000 RPM and hold it there.
LEAN and RICH indicate the condition of the exhaust. LED 3 flashes to indicate that the
scan tool is receiving a signal from the exhaust gas oxygen sensor.
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To perform a switch test:
1. From the Functional Tests menu, select
SWITCH TEST.
A screen like Figure 12-8 displays.
WITH KEY ON AND ENGINE OFF, TEST EACH
SWITCH. AS ANY SWITCH STATE CHANGES,
DISPLAY ALTERNATIVES HIGH/LOW & LED 3
GOES ON/OFF. PRESS Y TO CONTINUE.
Figure 12-8
SWITCH TEST selected
2. Press
Y.
A screen like Figure 12-9 displays.
TEST ANY SW: NEUTRAL/CLUTCH INHIBITOR,
IDLE, HEADLAMP, BRAKE LAMP, BLOWER A/C,
REAR DEFROSTER, WATER THERMO.
SWITCH STATE___HIGH
Figure 12-9
Switch Test
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NOTE:
Not all switches displayed apply to every vehicle. Refer to Mazda service procedures and
specifications for availability of specific switch tests.
As you test each switch, the SWITCH STATE parameter should alternately display HIGH
or LOW each time a switch status changes. Also, LED 4 turns on when this parameter
displays LOW, and off when HIGH. See Table 12-1 for individual switch test instructions.
Table 12-1
Individual switch test instructions (sheet 1 of 2)
SWITCH
Clutch
Neutral
Inhibitor
Idle
TEST INSTRUCTIONS
With the key on and engine off, SWITCH STATE alternates HIGH/LOW as the clutch
is depressed and released.
SWITCH STATE alternates HIGH/LOW when switching from a drive state to a park/
neutral state.
(A/T only) Make sure the engine is off. SWITCH STATE alternates HIGH/LOW as the
transmission is placed in gear and returned to neutral.
SWITCH STATE alternates HIGH/LOW as the accelerator pedal is pressed and
released.
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Table 12-1
Individual switch test instructions (sheet 2 of 2)
SWITCH
Head lamp
Brake Lamp
Blower
A/C
Rear
Defroster
Water
Thermo
TEST INSTRUCTIONS
SWITCH STATE alternates HIGH/LOW as the head lamps are turned on and off. Turn
off the head lamps after the test.
SWITCH STATE alternates HIGH/LOW as the brake pedal is pressed and released.
Turn the blower switch to the high position. SWITCH STATE alternates HIGH/LOW as
the blower switch position changes. Turn the blower off after the test.
With the blower set to low, SWITCH STATE alternates HIGH/LOW as the A/C is
turned on and off. Turn off the blower and air conditioner after the test.
SWITCH STATE alternates HIGH/LOW as the rear defroster is turned on and off.
Turn off the rear defroster after the test.
SWITCH STATE alternates HIGH/LOW as the water thermo switch is disconnected.
Reconnect the switch after the test.
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NOTE:
If coolant is at operating temperature, the LED is always on.
To perform a base timing check:
•
From the Functional Tests menu, select
BASE TIMING CHECK.
A screen like Figure 12-10 displays.
THE VEHICLE CHECK CONNECTOR HAS BEEN
GROUNDED BY THE SCANNER. BASE IGNITION
TIMING CAN NOW BE CHECKED.
PRESS N WHEN DONE.
Figure 12-10
Base Timing Check
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NOTE:
On some models, the transmission test connector is under the instrument panel. Do not
connect to the engine test connector.
12.1.4 Functional Tests—All models with EEC-IV and EEC-V
systems
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NOTE:
Operations described in this section are not available on all tool platforms.
Functional Tests are available for Mazda vehicles with EEC-IV and EEC-V control systems,
but menu items are completely different for each system. See “EEC-IV Functional Tests” on
page 128 and “EEC-V Functional Tests” on page 132 for details.
NOTE:
The ignition key should be switched off when selecting FUNCTIONAL TESTS from the MAIN
MENU - PCM on EEC-IV and EEC-V vehicles.
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