Retrieving DTCS: Voltmeter
- Turn ignition off. Connect analog voltmeter between Data Link Connector (DLC) diagnostic terminal and ground terminal. See Fig 1 . Turn ignition on.
- Stored Diagnostic Trouble Codes (DTCs) will be indicated by sweeps of voltmeter needle. Long sweeps indicate first digit of DTC; short sweeps indicate second digit. If more than one fault is present, lowest number DTC will be given first. After DTCs have been retrieved, test indicated component and/or related circuit (if necessary). See RWAL DTC DEFINITIONS table and appropriate DTC TEST under CIRCUIT TESTS for servicing procedure.
RWAL DTC DEFINITIONS
| DTC (1) | Condition/Circuit | ||||
|---|---|---|---|---|---|
| DTC 15 | Vehicle Speed Sensor Circuit (Open Or Short) | ||||
| DTC 16 | Loss Of Battery Voltage | ||||
| DTC 21 | "G" Sensor Circuit (Open Or Short) | ||||
| DTC 22 | Brakelight Switch Circuit | ||||
| DTC 41, DTC 42 | Modulator Valve Circuit (Open Or Short) | ||||
| DTC 55 (2) | RWAL ECU | ||||
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