Visual Inspection and Diagnostic Pre-checks
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- Make sure the vehicle battery terminals and cables are free of any corrosion and other contaminants.
- Make sure the vehicle battery terminals are tightened to their correct torque specifications.
- Make sure BCM fuse 37 (20A) is OK.
NOTE:
Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
Harness Side
| Circuit | Pin |
|---|---|
| IGN START/RUN (Ignition START/RUN) - CBP37 | 4 (WHITE) |
CIRCUIT AND PIN DESCRIPTION
| Circuit | Pin |
|---|---|
| IGN START/RUN (Ignition START/RUN) - CBP37 | 4 (WHITE) |
- BL1: CHECK FOR OTHER SASM DTCS
- Ignition ON, engine OFF.
- Carry out the SASM self-test.
- Is DTC U3003:1C present?
Yes No Go to PINPOINT TEST BD . Go to BL2.
- BL2: CHECK FOR OTHER BCM DTCS
- Carry out the BCM self-test.
- Are any DTCs present in the BCM?
Yes No DIAGNOSE all BCM DTCs. Refer to Multifunction Electronic Modules article. Go to BL3.
- BL3: CHECK THE SASM IGNITION VOLTAGE CIRCUIT FOR AN OPEN
- Ignition OFF.
- SASM connector disconnected. (C2414)
- BCM_H connector disconnected. (C2280H)
- Measure the resistance between:
(+) BCM_A Connector, Harness Side (-) SASM (C2414) Connector, Harness Side IGN START/RUN IGN START/RUN - CBP37 - Pin 4 - Measure the resistance between:
(+) BCM_H (C2280H) Connector, Harness Side (-) SASM (C2414) Connector, Harness Side IGN START/RUN - CBP37 (WHITE) - Pin 4 IGN START/RUN - CBP37 - Pin 4 - Is the resistance less than 3 ohms?
Yes No Go to BL4. REPAIR the circuit.
- BL4: VERIFY ALL WIRING CONNECTIONS
- Using a good light source, inspect disconnected electrical connectors for the following:
- corrosion - install new connector or terminal and clean the module pins.
- damaged or bent pins - install new terminals or pins.
- pushed-out pins - install new pins as necessary.
- spread terminals - install new terminals as necessary.
- Are the connectors free of corrosion, damaged pins, bent pins, pushed-out pins and spread terminals?
Yes No Go to BL5. REPAIR the connector or terminals. REFER to OEM GROUND DISTRIBUTION article for schematic and connector information.
- Using a good light source, inspect disconnected electrical connectors for the following:
- BL5: CHECK FOR CORRECT SASM OPERATION
- BCM_H connector connected. (C2280H) Make sure the connector seats and latches correctly.
- SASM connector connected. (C2414) Make sure the connector seats and latches correctly.
- Operate the system and determine if the concern is still present.
- Is the concern still present?
Yes No INSTALL a new SASM.
CHECK OASIS for any applicable Technical Service Bulletins TSBs.
If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions.
If no service articles address this concern, INSTALL a new SASM-clockspring assembly. REFER to Supplemental Restraint System article.The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.