6-2-132 ENGINE GENERAL INFORMATION AND DIAGNOSIS (M13 ENGINE)
9 Check vehicle speed sensor signal.
1) Remove VSS referring to “Vehicle Speed
Sensor (VSS)” in Section 7A2 or “Output
Shaft Speed Sensor (VSS)” in Section 7B1.
2) Remove metal particles on end face of VSS,
if any.
3) Connect connectors to ECM and VSS with
ignition switch turned OFF.
4) Turn ignition switch to ON position.
5) Check voltage between “E22-19” terminal of
ECM connector and engine ground by pass-
ing magnetic substance (iron) (1) while
keeping approx. 1 mm (0.03 in.) gap with
respect to end face of VSS. See Fig. 2.
Does voltage vary from low (0 – 1 V) to high (4 –
5 V) or from high to low?
Go to Step 12. Go to Step 10.
10 Check vehicle speed sensor signal.
1) Turn ignition switch to OFF position.
2) Disconnect connectors from combination
meter.
3) Turn ignition switch to ON position.
4) Check voltage between “E22-19” terminal of
ECM connector and engine ground by pass-
ing magnetic substance (iron) (1) while
keeping approx. 1 mm (0.03 in.) gap with
respect to end face of VSS.
Does voltage vary from low (0 – 1 V) to high (4 –
5 V) or from high to low?
Replace combination
meter.
Go to Step 11.
11 Check vehicle speed sensor signal.
1) Turn ignition switch to OFF position.
2) Disconnect connectors from TCM.
3) Turn ignition switch to ON position.
4) Check voltage between “E22-19” terminal of
ECM connector and engine ground by pass-
ing magnetic substance (iron) (1) while
keeping approx. 1 mm (0.03 in.) gap with
respect to end face of VSS.
Does voltage vary from low (0 – 1 V) to high (4 –
5 V) or from high to low?
Substitute a known-good
TCM and recheck.
Replace VSS.
12 Check signal rotor.
1) Remove VSS referring to “Vehicle Speed
Sensor (VSS)” in Section 7A2 or “Output
Shaft Speed Sensor (VSS)” in Section 7B1.
2) Visually inspect VSS sensor signal rotor for
damage.
Was any damage found?
Faulty VSS signal rotor. Substitute a known-good
VSS and recheck.
Step Action Yes No
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