Mazda B-Series 1997 Workshop Manual page 434

ON-BOARD DIAGNOSIS SYSTEM
FT
STEP
-
INSPECTION
- - - - -
ACTION
19
'
Key
ON,
engine running. Yes
.
Check for TP sensor loosely connected to
Do normal drive, exercise throttle and TP sensor near
throttle body. If RetrieveIClear Continuous
higher gears while accessing PIDs.
DTC PI121 is now present, replace MAF
Access TP PID and LOAD PID and record readings.
sensor.
Is TP PID less than 0.24 volts (4.90%) and LOAD PID
Go to step 23.
greater than 60%?
I
No Unable to identify fault at this time. If vehicle
20 Run engine to 1500 rpm for 5 seconds.
Access TP PID for a fault indication while performing the
following:
- Lightly tap on TP sensor and wiggle harness connector
j
to simulate road shock. Go to next step.
i
Is TP PID changing below minimum 0.49 volts (9.80%) or
/
above maximum 4.60 volts (92.27%).
- . -
1
Yes
'
Isolate fault and repair or replace as
Install breakout box, reconnect PCM.
,
necessary.
Kev ON, enaine off.
Go to step 23.
~ e a s u r 6 votage between TP SIG test pin 89 and SIG
RTN test pin 91 at breakout box while doing the following:
-
Grasp, shake, bend and wiggle harness.
Is voltage changing below 0.49V or above 4.60V?
Key OFF.
Start engine.
Activate KOER self-test at idle.
Is DTC PO121 present or does KOER self-test fail to
terminate?
Yes
Unable to duplicate andlor identify fault at this
time. Go to "lntermitter~t Concerns."
-
page FT-69
Check for opens in TP SIG and SIG RTN
circuit between TP and PCM. If no open
circuit exists, replace T'P sensor.
Go to next stet).
- -
Go to Diagnostic Index for possible fast idle
concerns.
I L A -
I
Perform After Repair Procedure to ensure customer's concern has been resolved.
6BUOFT-060
SIG F1TN TP SIG
TEST PIN 91 TEST PIN 89 VREF
GY/R GYAN
TEST PIN
90
\
AN
(VIEW
THROTTLE POSITION SENSOR
CONNECTOR (TP)
FROM PIN SIDE)