Pinpoint Test

1. Ignition ON.
2. Using a scan tool, carry out the ABS module self-test.

Is DTC C1B14:11, 12 or U3000:47 present? 

1. Yes: REFER to Diagnostic Routine AE: C1B14:11, 12 or U3000:47 .
2. No: If DTC C101A:2A or 62 is present, GO to 2  .

   If DTC C101A:1C or 2F is present, GO to  3  .

   For all other DTCs  , REFER to DTC Chart: Anti-Lock Brake System (ABS) Module .

1. Inspect the vacuum hoses, brake booster and brake booster seals for leaks or evidence of leaks.

Are any leaks or evidence of leaks found? 

1. Yes: REPAIR or INSTALL new components as necessary.
2. No: GO to 3  .

1. Ignition OFF.
2. Disconnect ABS Module electrical connector.
3. Disconnect Brake Booster Vacuum Sensor electrical connector.
4. Ignition ON.
5. Measure:

   ABS Module			Ground
   C135			Ground
   Pin	Circuit	Measurement / Action	Pin	Circuit
   26	VCA36 (YE/GN)		-	Ground
   27	RCA36 (GY/OG)		-	Ground
   30	LCA37 (YE/OG)		-	Ground

Is any voltage present? 

1. Yes: REPAIR the affected circuit(s).
2. No: GO to 4  .

1. Ignition OFF.
2. Measure:

   ABS Module			Ground
   C135			Ground
   Pin	Circuit	Measurement / Action	Pin	Circuit
   26	VCA36 (YE/GN)		-	Ground
   27	RCA36 (GY/OG)		-	Ground
   30	LCA37 (YE/OG)		-	Ground

Are the resistances greater than 10, 000 ohms? 

1. Yes: GO to 5  .
2. No: REPAIR the circuit.

1. Measure:

   ABS Module			Brake Booster Vacuum Sensor
   C135			C149
   Pin	Circuit	Measurement / Action	Pin	Circuit
   26	VCA36 (YE/GN)		3	VCA36 (YE/GN)
   27	RCA36 (GY/OG)		2	RCA36 (GY/OG)
   30	LCA37 (YE/OG)		1	LCA37 (YE/OG)

Are the resistances less than 3 ohms? 

1. Yes: GO to 6  .
2. No: REPAIR the affected circuit(s).

1. Measure:

   Brake Booster Vacuum Sensor			Brake Booster Vacuum Sensor
   C149			C149
   Pin	Circuit	Measurement / Action	Pin	Circuit
   1	LCA37 (YE/OG)		2	RCA36 (GY/OG)
   1	LCA37 (YE/OG)		3	VCA36 (YE/GN)
   2	RCA36 (GY/OG)		3	VCA36 (YE/GN)

Are the resistances greater than 10, 000 ohms? 

1. Yes: INSTALL a new brake booster vacuum sensor. REFER to Brake Booster Vacuum Sensor . DRIVE the vehicle at speeds greater than 10 kmh (6 mph) for at least 4 minutes and CARRY OUT at least 3 stops.

   REPEAT the ABS module self-test. If DTC C101A:1C, 2A, 2F or 62 returns, GO to 7  .

2. No: REPAIR the affected circuit(s).

1. Ignition OFF.
2. Disconnect and inspect the ABS Module electrical connector.
3. Repair:
   • corrosion (install new connector or terminal - clean module pins)
   • damaged or bent pins - install new terminals/pins
   • pushed-out pins - install new pins as necessary
4. Connect the ABS Module electrical connector. Make sure it seats and latches correctly.
5. Operate the system and determine if the concern is still present.

Is the concern still present? 

1. Yes: CHECK OASIS for any applicable TSBs  . If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions.

   If no TSBs  address this concern and the vehicle is not equipped with adaptive cruise control, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module .

   If no TSBs  address this concern and the vehicle is equipped with adaptive cruise control, INSTALL a new ABS module and HCU. REFER to Anti-Lock Brake System (ABS) Module  and Hydraulic Control Unit (HCU) .

2. No: 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.