Cannot Change 4X4 Mode - Mazda B-Series 1997 Workshop Manual

ELECTRONIC SHIFT TRANSFER CASE
52
*TEST PINS LOCATED ON BREAKOUT BOX
code No.
P1812, Pi815
INSPECTION
1
ACTION
I
Remove and disconnect 4x4 shift control
switch.
Inspect wiring and connector for damage.
Test Circuits (WILB) and (GYIR) for
resistance values in listed positions
below:
2WD
-
2K-8.7KS2
4WD High - 750R-1.9KQ
4WD LOW - 160-600R
Are the values correct?
Go to steo 2.
Replace 4x4 shift control switch.
Clear all DTCs and retest system.
Gain access to the GEM module T-223
Connector. Measure resistance of Pin 08,
Circuit (WILB) between GEM module
and 4x4 shift control switch.
Is resistance less than 5 ohms?
Yes
-
No
Go to step 3.
Repair circuit (WILB) foropen.
Reconnect and clear all DTCs and retest system.
I
Reconnect GEM T-223 Connector
Kev ON
1
Yes Service battery short reconnect switch.
Clear all DTCs and retest svstem.
, - ~
Measure for voltage on Circuits (WILB)
and GY/R)
/
Is B+ present?
1
Disconnect GEM T-223 Connector
Check T-223 Pin 08 for continuity to a
1
yes
C -
known ground
No
Is continuitv present'?
I
Service circuit (WILB) for short to ground.
Clear all DTCs and retest system.
Go to step 5.
Remove GEM T-221 Connector
Check Circuit (GYIR between 4x4 shift
control switch and GEM T-221 Connector
Pin 21 for continuity
Circuit OK. Reconnect GEM connector.
Clear all DTCs and retest system.
Service cirucit (GYIR) for open.
Clear all DTCs and retest svstem.
I
1
Is continuity present'?
MJ1179-A
I
5BUOJ2-043