Diagnosis Procedure
DIAGNOSIS PROCEDURE CHART
| Step |
Action |
YES |
NO |
| 1 |
CHECK ECM POWER SUPPLY
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check voltage between ECM terminal 121 and ground with SDT or tester.
 Courtesy of SUZUKI OF AMERICA CORP.
Voltage: Battery voltage
OK or NG |
GO TO 3. |
GO TO 2. |
| 2 |
DETECT MALFUNCTIONING PART
Check the following.
- 20A fuse (No. 53)
- IPDM E/R harness connector E121
- Harness for open or short between ECM and battery
|
Repair or replace harness or connectors. |
|
| 3 |
CHECK INTERMITTENT INCIDENT
Refer to
[SERVICE INFORMATION FOR ELECTRICAL INCIDENT: INTERMITTENT INCIDENT
]
OK or NG |
GO TO 4. |
Repair open circuit or short to ground or short to power in harness or connectors. |
| 4 |
PERFORM DTC CONFIRMATION PROCEDURE
- With SDT
- Turn ignition switch ON.
- Select "DTC check" mode with SDT.
- Touch "Clear".
- Perform DTC Confirmation Procedure. See
[P0603 ECM POWER SUPPLY ].
- Is the 1st trip DTC P0603 displayed again?
- With GST
- Turn ignition switch ON.
- Select Service $04 with GST.
- Perform "DTC Confirmation Procedure". See
[P0603 ECM POWER SUPPLY ].
- Is the 1st trip DTC P0603 displayed again?
Yes or No |
GO TO 5. |
INSPECTION END |
| 5 |
REPLACE ECM
- Replace ECM.
- Perform initialization of immobilizer system and registration of all immobilizer system ignition key IDs. Refer to
[ECM RE-COMMUNICATING FUNCTION: SPECIAL REPAIR REQUIREMENT
]
- Perform "VIN Registration" in VIN Registration
.
- Perform "Accelerator Pedal Released Position Learning" in Accelerator Pedal Released Position Learning
.
- Perform "Throttle Valve Closed Position Learning" in Throttle Valve Closed Position Learning
.
- Perform "Idle Air Volume Learning" in Idle Air Volume Learning
.
|
INSPECTION END |
|