Diagnosis Procedure
CAUTION:
Perform diagnosis under the condition that engine cannot start by the following procedure.
- Remove fuel pump fuse.
- Crank or start the engine (where possible) until the fuel pressure is released.
- CHECK "B" TERMINAL CIRCUIT
- Turn ignition switch OFF.
- Check that starter motor "B" terminal connection is clean and tight.
- Check voltage between starter motor "B" terminal and ground.
Terminals Voltage (Approx.) (+) (-) Starter Motor "B" Terminal Terminal E204 (VQ37VHR)
E206 (VK50VE)2 Ground Battery voltage
Is the inspection result normal?
YES
GO TO STEP 2 .
NO
Check harness between battery and starter motor for open circuit.
- CHECK BATTERY CABLE CONNECTION STATUS (VOLTAGE DROP TEST)
- Shift A/T selector lever to "P" or "N" position.
- Check voltage between battery positive terminal and starter motor "B" terminal.
Terminals Condition Voltage (Approx.) (+) (-) Starter Motor
"B" TerminalTerminal Battery Positive Terminal E204 (VQ37VHR)
E206 (VK50VE)2 When The Ignition Switch Is In START Position Less than
0.5 VIs the inspection result normal?
YES
GO TO STEP 3 .
NO
Check harness between the battery and the starter motor for poor continuity.
- CHECK GROUND CIRCUIT STATUS (VOLTAGE DROP TEST)
- Shift A/T selector lever to "P" or "N" position.
- Check voltage between starter motor case and battery negative terminal.
Terminals Condition Voltage (Approx.) (+) (-) Starter Motor Case Battery Negative Terminal When The Ignition Switch Is In START Position Less than 0.2 V Is the inspection result normal?
YES
"B" terminal circuit is OK. Further inspection is necessary. Refer to WORK FLOW (WITH GR8-1200 NI) or WORK FLOW (WITHOUT GR8-1200 NI) .
NO
Check the starter motor case and ground for poor continuity.