Diagnostic Test

ACTIVE DTC
1. Ignition on, engine not running.
2. With a scan tool, read DTCs.
Q: Is the DTC active at this time?

Yes :
- Go To 2
No :
- Refer to the INTERMITTENT CONDITION DIAGNOSTIC PROCEDURE .
- Perform the POWERTRAIN VERIFICATION TEST .
GENERATOR OPERATION

Fig 1: Checking Generator Operation
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
1. Turn the ignition off.
2. Disconnect the Generator Field harness connector.
3. Using a 12-volt test light, jump it across the Generator Field harness connector.
4. Ignition on, engine not running.
5. With the scan tool, actuate the Generator Field Control circuit.
Q: Does the test light illuminate brightly and flash on and off?

Yes :
- Replace the Generator.
- Perform the POWERTRAIN VERIFICATION TEST .
No :
- Go To 3
(K20) GEN FIELD CIRCUIT SHORTED BATTERY VOLTAGE

Fig 2: Checking Gen Field Circuit Shorted Battery Voltage
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
1. Turn the ignition off.
2. Disconnect the C2 PCM harness connector.
3. Ignition on, engine not running.
4. Measure the voltage on the (K20) Gen Field Control circuit in the Generator Field harness connector.
Q: Is the voltage above 1.0 volt?

Yes :
- Repair the short to battery voltage in the (K20) Gen Field Control circuit.
- Perform the POWERTRAIN VERIFICATION TEST .
No :
- Go To 4
(K20) GEN FIELD CIRCUIT OPEN

Fig 3: Checking Generator Field Control Circuit Open
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
1. Turn the ignition off.
  CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.
2. Measure the resistance of the (K20) Gen Field Control circuit from the Generator Field harness connector to appropriate terminal of the special tool #8815.
Q: Is the resistance below 5.0 ohms?

Yes :
- Go To 5
No :
- Repair the open in the (K20) Gen Field Control circuit.
- Perform the POWERTRAIN VERIFICATION TEST .
(K20) GEN FIELD CIRCUIT SHORTED TO GROUND

Fig 4: Checking Generator Field Control Circuit Shorted To Ground
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
1. Measure the resistance between ground and the (K20) Gen Field Control circuit in the Generator Field harness connector.
Q: Is the resistance below 100 ohms?

Yes :
- Repair the short to ground in the (K20) Gen Field Control circuit.
- Perform the POWERTRAIN VERIFICATION TEST .
No :
- Go To 6
(Z20) GROUND CIRCUIT OPEN

Fig 5: Checking Ground Circuit Open
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
1. Using a 12-volt test light connected to battery voltage, probe the (Z20) Ground circuit in the Gen Field harness connector.
Q: Does the test light illuminate brightly?

Yes :
- Go To 7
No :
- Repair the open in the (Z20) Ground circuit.
- Perform the POWERTRAIN VERIFICATION TEST .
PCM
NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.
1. Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.
Q: Were there any problems found?

Yes :
- Repair as necessary.
- Perform the POWERTRAIN VERIFICATION TEST .
No :
- Replace and program the Powertrain Control Module per Service Information.
- Perform the POWERTRAIN VERIFICATION TEST .