High Oil Consumption/Leaks; Cooling System Concerns - Mazda B-Series 1997 Workshop Manual

FT
TROUBLESHOOTlNG GUIDE
STEP
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11
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12
1
13
14
1
20
1
COOLING SYSTEM CONCERNS
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OVERHEATING
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I
19
1
HIGH OIL CONSUMPTIONILEAKS
(
DESCRIPTION
(
Engine runs at higher than normal temperatureloverheats
1
INSPECTION
Key OFF.
' I
Yes
Install breakout box. Leave PCM disconnected.
DESCRIPTION
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STEP
I
INSPECTION
1
ACTION
1
ACTION
- .
Replace PCM
0 1 1
consumption excesslve
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1
Is drive belt OK?
/
Yes
1
Go to next steo
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Section
No Replace drive belt
STEP
1
2
3
7
a ; . .
Section G
Refer to 1997 B-series BETM to check instrument
cluster bulb
If OK, repair open in wiring harness between
ignition switch and test pin 79 at harness connector
p p - p . p
~-
~
~-
Repair short circuit between test pin 2 and MIL
Reconnect PCM
Replace PCM
- -
Repair short circuit between TClL bulb and test pin 79
Replace PCM
Key ON. No
'
Is the voltage between TClL test pin 79 and PWR
~
GND test pin 24 and between TClL test pin 79 and
PWR GND test pin 76 at breakout box greater than
2.0 volts?
Does the TClL remain on?
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Verify test results. If OK, return to diagnostic index to service any additional symptoms
--
Key OFF.
j
Install breakout box. Leave PCM disconnected.
Key ON.
Is the resistance between MIL test pin 2 and PWR
GND test pin 51 or PWR GND test pin 103 at
breakout box less than 5.0 ohms?
Disconnect PCM and inspect both ends for damage,
moisture, pushed out pins, loose wires. Service as
necessary.
Yes
No
Yes
-
ACTION
Go to next step
Replace PCV valve
INSPECTION
1
NO Check for cause
=
For 2.3L: Section E l
For 3.OL: Section E2
Key ON, engine off. No
Remove PCV valve and shake PCV valve.
Does PCV valve rattle?
Yes
No
Is blue smoke comlng from exhaust?
For 4.OL: Section E3
Repair or replace
Go to next step
-
Yes
No
3
Verlfy test results If OK, return to dtagnostlc ~ndex to servlce any addlt~onal symptoms
Yes Check for cause
Go to the "EXHAUST SMOKE"
Inspect engine block for leaks or blockage.
Is fault present?
- -
4
No
Verify test results. If OK, return to diagnostic index to service any additional symptoms
D~agnost~c Troubleshoot~ng chart No 22
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page
FT-61
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