EN(H4SO 2.5)(diag)-221
ENGINE (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
6
CHECK HARNESS BETWEEN ECM AND
TUMBLE GENERATOR VALVE POSITION
SENSOR CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from tumble gen-
erator valve position sensor.
3) Turn the ignition switch to ON.
4) Measure the voltage between tumble gen-
erator valve position sensor connector and
engine ground.
Connector & terminal
(E50) No. 1 (+) — Engine ground (
−
):
Is the voltage more than 4.5 V? Go to step 7.
Repair the har-
ness and connec-
tor.
NOTE:
In this case, repair
the following:
• Open circuit of
harness between
tumble generator
valve position sen-
sor and ECM con-
nector
• Poor contact in
tumble generator
valve position sen-
sor connector
• Poor contact in
ECM connector
• Poor contact in
coupling connector
• Poor contact in
joint connector
7
CHECK HARNESS BETWEEN ECM AND
TUMBLE GENERATOR VALVE POSITION
SENSOR CONNECTOR.
1) Turn the ignition switch to OFF.
2) Measure the resistance of harness
between ECM connector and tumble generator
valve position sensor connector.
Connector & terminal
(B136) No. 26 — (E50) No. 3:
Is the resistance less than 1
Ω?
Go to step 8.
Repair the har-
ness and connec-
tor.
NOTE:
In this case, repair
the following:
• Open circuit of
harness between
tumble generator
valve position sen-
sor and ECM con-
nector
• Poor contact in
ECM connector
• Poor contact in
tumble generator
valve position sen-
sor connector
• Poor contact in
coupling connector
8
CHECK HARNESS BETWEEN ECM AND
TUMBLE GENERATOR VALVE POSITION
SENSOR CONNECTOR.
Measure the resistance of harness between
tumble generator valve position sensor con-
nector and engine ground.
Connector & terminal
(E50) No. 3 — Engine ground:
Is the resistance more than 1
M
Ω?
Go to step 9.
Repair the ground
short circuit of har-
ness between tum-
ble generator valve
position sensor
and ECM connec-
tor.
9
CHECK POOR CONTACT.
Repair the poor contact in tumble generator
valve position sensor connector.
Is there poor contact in tumble
generator valve position sen-
sor connector?
Repair the poor
contact in tumble
generator valve
position sensor
connector.
Replace the tum-
ble generator valve
position sensor.
<Ref. to FU(H4SO
2.5)-30, Tumble
Generator Valve
Position Sensor.>
Step
Check
Yes
No