1A-128 Engine General Information and Diagnosis:
Step
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?
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?
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?
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?
DTC P0500: Vehicle Speed Sensor "A" Malfunction
Wiring Diagram
3
4
15
14
13
12
11
30
28
27
26
29
45
44
43
42
41
60
59
58
57
56
1. ECM
2. ABS/ESP® control module
Action
WHT
WHT
BLK
WHT/BLK
RED
WHT
BLK
RED/BLK
E23
10
9
8
7
6
5
4
3
25
24
23
22
21
20
19
18
40
39 38
37
36
35
34
33
55
54 53
52
51
50
49
48
Go to Step 13.
Go to Step 14.
"GRN" wire is open
circuit.
Intermittent trouble.
Check for intermittent
refer to "Intermittent and
Poor Connection
Inspection in Section
00".
If OK, substitute a
known-good ECM and
recheck.
2
12V
RED
WHT
12V
2
1
13
12
15
14
11
17
16
30
28
27
26
29
32 31
45
44
43
42
41
47 46
60
59
58
57
56
3. Front left side wheel speed sensor
4. Front right side wheel speed sensor
Yes
"GRN" wire is shorted to
ground circuit.
"GRN" wire is shorted to
power supply circuit.
Replace relay.
Faulty ECM.
1
RED
E23-3
E23-18
WHT
C37
8
10
9
7
6
5
4
3
25
24
23
22
21
20
19
18
40
39 38
37
36
35
34
33
55
54 53
52
51
50
49
48
No
S7RS0B1104051
1
2
17
16
32 31
47 46
I7RS0B110017-01
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