Power Steering Pressure (Psp) Switch Circuit (2.3L Only) - Mazda B-Series 1997 Workshop Manual

ON-BOARD DIAGNOSIS SYSTEM
FT
Diagnostic trouble code POWER STEERING PRESSURE (PSP) SWITCH CIRCUIT (2.:3L ONLY)
No. P I 650, P I 651
Symptom
PSP switch circuit voltage out of self-test range or circuit malfunction.
I -
Key ON, engine running.
Does PSP PID indicate ONIOFF switching as the steering
wheel is turned right and left?
I
STEP
/
INSPECTION
I
ACTION
With the vehicle in P (Park) [N (Neutral)], does the idle
speed increase when the PSP switch is disconnected?
[
1:
indicates MT models
1
Key
OFF.
Does PSP switch connector or PCM connector have a
poor connection?
Key OFF.
Is there continuity between PSP switch connector terminal
PSP SIG (YILG) and PSP SIG test pin 31 (YILG), and
between PSP switch connector terminal SIG RTN (GYIR)
and SIG RTN test pin 91 (GYIR)?
Yes
No
Yes
No
Yes
Key OFF.
1
Yes GO to next step.
Is the resistance greater than '10,000 ohms between PSP
- -
SIG test pin 31 (YILG) and SIG RTN test pin 91 (GYIR) or
Repair short in PSP SIG circuit.
chassis ground?
I
Go to step 6.
Intermittent poor connection or component
malfunction (repair or replace as necessary).
Go to next step.
Replace PSP.
Go to step 7.
Go to next step.
Repair or replace connector.
Is resistance of PSP switch less than 5.0 ohms?
. -
Perform After Repair Procedure to ensure customer's concern has been resolved.
MF1658-B
TEST PIN 31
0 -
TEST PIN 91
0 -
GY/R
POWER Sl-EERING
PRESSURE SWITCH
CONNECTOR
TEST PINS LOCATED ON BREAKOUT BOX.
ALL CONNECTORS VIEWED IN MATING SURFACE. (VIEW FROM PIN SIDE)
No
GO to step 7.
Go to next step.