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6-166 ENGINE GENERAL INFORMATION AND DIAGNOSIS
DTC P0601 Internal Control Module Memory Check Sum Error
DTC P0602 Control Module Programming Error
SYSTEM DESCRIPTION
Internal control module is installed in ECM.
DTC DETECTING CONDITION AND TROUBLE AREA
DTC DETECTING CONDITION
Data write error or check sum error
DTC CONFIRMATION PROCEDURE
1) Connect scan tool to DLC with ignition switch OFF.
2) Turn ON ignition switch and clear DTC, pending DTC and freeze frame data by using scan tool.
3) Start engine and run it at idle if possible.
4) Check DTC and pending DTC by using scan tool.
TROUBLESHOOTING
Substitute a known-good ECM and recheck.
DTC P1510 ECM Back-up Power Supply Malfunction
WIRING DIAGRAM
C64
7
6
5
4
17
16
15
14
13
12
27
26
25
24
23
22
34
33
32
1. ECM
2. "RADIO DOME" fuse
3. Relay/fuse box
CIRCUIT DESCRIPTION
Battery voltage is supplied so that diagnostic trouble code memory, values for engine control learned by ECM,
etc. are kept in ECM even when the ignition switch is turned OFF.
3
WHT/RED
C63
3
2
1
7
6
5
4
3
11
10
9
8
19
18
17
16
15
14
13
12
21
20
19
18
27
26
25
24
31
30
29
28
35
34
33
32
ECM
2
WHT/RED
G91
2
1
6
5
4
3
11
10
9
8
16
15
14
13
12
11
10
23
22
21
20
27
26
25
24
23
22
21
20
31
30
29
28
35
34
33
32
31
TROUBLE AREA
1
G91-16
2
1
9
8
7
19
18
17
30
29
28
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