Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 962

Code No.41 Power circuit system (fuse No.4 circuit)
Code No.42 Power circuit system (fuse No.11 circuit)
Code No.41 is output if the voltage between the IG
18) and the earth is lower than the specified value for a continuous period of 5
seconds or more.
Code No.42 is output if the voltage between the IG
21) and the earth is lower than the specified value for a continuous period of 5
seconds or more.
Automatically erased, and the SRS warning lamp will switch off.
If the vehicle has a discharged battery it will store the fault codes 41 and 42. When
these diagnosis codes are displayed, check the battery.
Measure at SRS-ECU connector D-25.
Disconnect the connector, and measure at the harness side
connector.
Connect the battery (–) terminal.
Ignition switch: ON
Voltage between terminal 18 and body earth (code No.41)
OK: 9 V or more
Voltage between terminal 21 and body earth (code No.42)
OK: 9 V or more
Replace the SRS-ECU.
Code No.43 SRS warning lamp drive circuit system (Lamp
does not illuminate.)
This diagnosis code is output when an open circuit occurs for a continuous period
of 5 seconds while the SRS-ECU in monitoring the SRS warning lamp and the
lamp is OFF (transistor OFF).
However, if this code is output due to an open circuit, if the vehicle condition returns
to normal, this diagnosis code No.43 will be automatically erased, and the SRS
warning lamp will return to normal.
Measure at SRS-ECU connector D–25.
Disconnect the connector, and measure at the harness side
connector.
Connect the battery (–) terminal.
Ignition switch: ON
Connect terminal 19 to the body earth.
OK: Lamp illuminates
Replace the SRS-ECU.
SRS –
terminal (SRS–ECU, terminal
1
terminal (SRS–ECU, terminal
1
OK
OK
Troubleshooting
Probable cause
Malfunction of wiring harnesses or connectors
Malfunction of SRS-ECU
NG
Check the following connectors: D-25, B-80, B–78
OK
Check trouble symptoms.
NG
Check the harness wire between the SRS–ECU and ignition switch
IG and repair if necessary.
1,
Probable cause
Malfunction of wiring harnesses or connectors
Blown bulb
Malfunction of SRS-ECU
Malfunction of combination meter
NG
Blown bulb inspection
OK
Check the following connectors: D-25, B-01, B-80
OK
Check trouble symptoms.
NG
Check the harness wire between the SRS–ECU, combination
meter and ignition switch IG
OK
Replace the combination
meter.
52B-13
NG
Repair
NG
Repair
NG
Repair
1.
NG
Repair