Briggs & Stratton Vanguard EFI 380000, Руководство по ремонту

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DTC P1693/P1694 Tachometer Driver Circuit Open, Grounded, or Shorted to B+ (Non-Scan
Diagnostics)
Step Action Yes No
1 1. Disconnect and reconnect tachometer and ECM connectors.
2. Install Service Power Supply Harness (Part No. 847252).
3. Clear codes.
4. Disconnect and reconnect service power supply connector.
5. Does DTC return?
Go to step 2. Problem corrected.
2 1. Back probe terminal J11 (Red wire) of ECM connector.
2. Connect terminal J11 back probe to red meter test lead on DVOM.
3. Back probe terminal J9 (Black wire) of ECM connector.
4. Connect terminal J9 back probe to black meter test lead on DVOM.
5. Set DVOM to read volts DC.
6. Observe voltage on DVOM while cranking engine.
7. Is reading greater than 9 volts DC?
Replace tachometer. Go to step 3.
3 1. Disconnect service power supply connector.
2. Remove probe from terminal J9, and back probe terminal A (Red wire) of
tachometer connector.
3. Set DVOM to read resistance.
4. Observe resistance on DVOM.
5. Is reading 0.1 ohms or less?
Go to step 4. Repair or replace
EFI wire harness
or connectors.
Continued...
Tachometer Connector
Not for
Reproduction