Mazda MPV Facelift. Manual — part 7

HVAC Fuel

Fired

Heater

Service Training

25

Fuel Fired Heater

On-board diagnostic system

•

A self test/combustion test procedure, and lockout reset procedure have been added

•

PID and simulation item tables have been added to the workshop manual

•

A symptom troubleshooting index for the fuel fired heater has been added to the
workshop manual.

Combustion test

1. Connect the SST (WDS or equivalent) to the vehicle DLC-2 16-pin connector
2. Select the "Supplemental Heater Test" in the "Supplemental Heater Menu" of the

"Guided Diagnosis" function

3. Perform the KOEO Self Test/Combustion Test

NOTE: If the water heater unit is operating, the water heater unit will reject the test command.

Perform the DTC reading procedure after the water heater unit stops operating

Lockout reset (using WDS)

1. Connect the SST (WDS or equivalent) to the vehicle DLC-2 16-pin connector
2. Select "CLR_LOCKOUT" and "LOCKOUT
3. Turn "CLR_LOCKOUT" to ON using the simulation function
4. Verify that the "LOCKOUT" reading changes to "Unlocked"

Lockout reset (not using WDS)

For factory equipped water heater unit

1. Turn the ignition switch to the OFF position
2. Remove the W.HEAT 40 A fuse from the main fuse block for more than 5 seconds
3. Re-install the W.HEAT 40 fuse

For vehicles with a transmitter or timer

1. Turn the ignition switch to the OFF position
2. Remove the power supply 40 A fuse from the heater wiring harness for approx. 3

seconds

3. Re-install the power supply 40 A fuse
4. Press and hold down the ON switch of the transmitter or timer for approx. 3 seconds
5. Remove the power supply 40 A fuse from the heater wiring harness for approx. 3

seconds

6. Re-install the power supply 40 A fuse

Fuel Fired Heater

HVAC

26 Service

Training

On-board diagnostic system (continued)

PID monitor

PID Name

Definition

Unit/Condition

CCNTFFH

Number of continuous codes)

-

ECT

Engine coolant temperature

°C

°F

VPWR_FFH

Module supply voltage

V

VPWR_LMT

Low voltage threshold

V

FAN Fan

control

%

GPD

Glow plug duty cycle

%

BLOWRMTR Blower

motor

On/Off

FP Fuel

pump

On/Off

WATER_PMP

Water pump

On/Off

GLOW PLUG

Glow plugs

On/Off

COMB_FAN

Combustion air fan

On/Off

LOCKOUT Heater

lockout

Lock/Unlock

FS

Flame sensor

On/Off

HEATER Heater

status

Inactive/Active

HEATER_SW Heater

activation

switch

Inactive/Active

Simulation Test Item Table

Item Definition

Operation

CLR_LOCKOUT

Heater lockout mode clearing command

On/-

FUEL_PRIME

Fuel pump priming command
(The fuel pump is activated for 5 seconds.)

On/-

Body and Accessories

Service Training

27

Body and Accessories

Features

•

The headlamp design has been changed

•

Seven new body colours have been introduced: Blue Pacific Mica, Gloaming Silver,
Razor Blue, Nordic Green Mica, Titanium Grey II Mica, Arctic White, Snowflake White
Pearl

•

A three spoke steering wheel has been adopted

•

Karakuri seats are available on some versions

•

Driver information system now available for diesel vehicles

Body and Accessories

28 Service

Training

Multiplex communication system

•

A high-speed CAN multiplex communication system, as well as the existing ISO 9141
communication system have been adopted on diesel engine vehicles.

CAN

•

The following modules are connected to the CAN bus:

–

PCM

–

ABS/TCS module

–

Fuel fired heater

–

DLC-2

CAN diagram MPV

1

PCM 4

DLC-2

2

ABS/TCS module

5

Twisted wires

3

Fuel fired heater

ISO 9141

•

The following items are connected to the ISO 9141 network:

–

ABS/TCS module

–

DLC-2

–

DLC-1