1A-128 Engine General Information and Diagnosis:
DTC P0500: Vehicle Speed Sensor “A” Malfunction
S7RS0B1104051
Wiring Diagram
12 Wire circuit check
1) Disconnect radiator cooling fan control relay No. 2 and
No. 3 from individual circuit fuse box No.1 with ignition
switch turned OFF.
2) Measure resistance between “E23-48” terminal of ECM
connector and vehicle body ground.
Is resistance infinity?
Go to Step 13. “GRN” wire is shorted to
ground circuit.
13 Wire circuit check
1) Turn ON ignition switch.
2) Measure voltage between “E23-48” terminal of ECM
connector and vehicle body ground.
Is voltage 0 V?
Go to Step 14. “GRN” wire is shorted to
power supply circuit.
14 Radiator cooling fan relay No. 2 and No. 3 check
1) Check radiator cooling fan relay No. 2 and No. 3
referring to “Radiator Cooling Fan Relay Inspection in
Section 1F”.
Are relays in good condition?
“GRN” wire is open
circuit.
Replace relay.
15 Radiator cooling fan control No. 2 and No. 3 check
1) Connect connectors to ECM with ignition switch turned
OFF.
2) Connect radiator cooling fan relay No. 2 to individual
circuit fuse box No.1.
3) Run engine until ECT is over 102.5 °C, 216.5 °F.
4) Measure voltage between vehicle body ground and
“E23-48” terminal of ECM connector.
Is voltage lower than 1.5 V?
Intermittent trouble.
Check for intermittent
refer to “Intermittent and
Poor Connection
Inspection in Section
00”.
If OK, substitute a
known-good ECM and
recheck.
Faulty ECM.
Step Action Yes No
E23 C37
34
1819
5671011
1720
47 46495051
2122
52
1625
9
24
14
29
5557 54 53
59
60 58
2
262728
15
30
56 48
32 31343536374042 39 38
44
45 43 41 33
11213
23
834
1819
5671011
1720
47 46495051
2122
52
1625
9
24
14
29
5557 54 53
59
60 58
2
262728
15
30
56 48
32 31343536374042 39 38
44
45 43 41 33
11213
23
8
E23-3
E23-18
RED
WHT
RED
WHT
WHT/BLK
WHT
BLK
WHT
BLK
WHT
RED
RED/BLK
12V
12V
3
4
21
I7RS0B110017-01
1. ECM 3. Front left side wheel speed sensor
2. ABS/ESP® control module 4. Front right side wheel speed sensor
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