Impco HHI, Service Manual

Page: 227 / 485

227
DTC 222-TPS 2 Signal Voltage Low
Step Action Value(s) Yes No
1
Did you perform the On-Board (OBD) System
Check?
-
Go to Step
(2)
Go to OBD
System Check
Section
2

Key ON, Engine OFF

DST (Diagnostic Scan Tool) connected in
DBW (Drive by Wire) throttle test mode
Does the DST display TPS 2 voltage of 0.200
volts or less with the throttle closed
Go to Step
(4)
Go to Step (3)
3

Slowly depress Foot Pedal while observing
TPS 2 voltage
Does TPS 2 voltage ever fall below 0.200 volts?
Go to Step
(4)
Intermittent
problem
Go to Intermit-
tent section
4

Key OFF

Disconnect electronic throttle connector CN3

Jumper the 5 volt reference circuit 119 and
TPS 2 signal circuit 148 together at the throt-
tle connector CN3

Key ON
Does DST display TPS 2 voltage of 4.0 volts or
greater?
Go to Step
(7)
Go to Step (5)
5

Key OFF

Disconnect ECM wire harness connector
CN1

Using a DVOM check continuity on the TPS
2 signal circuit 148 between TPS 2 connector
CN3 and ECM connector CN1
Do have continuity between them?
Go to Step
(6)
Repair the
circuit as ne-
cessary. Refer
to Wiring Re-
pairs in
Engine Elec-
trical.
6

Replace ECM
Is the replacement complete?
Go to Step
(9)
7

Inspect the electronic throttle wire harness
connector terminals for damage, corrosion or
contamination
Did you find a problem?
Repair the
circuit as ne-
cessary.
Refer to Wir-
ing Repairs in
Engine Elec-
trical.
Go to Step (8)
8

Replace the electronic throttle
Is the replacement complete?
Go to Step
(9)
-