Serial Data Link Circuit Check: Inspection

ESP WARNING LAMP INSPECTION CHART

Step	Action	YES	NO
1	Turn ignition switch to ON position. Does ESP® warning lamp come ON?	Go to Step 2.	Go to Step 6.
2	Turn ignition switch to OFF position. Are main fuses for ABS pump motor and ABS solenoid in good condition?	Go to Step 3.	Replace fuse and check for short.
3	Disconnect ESP® control module connector. Check for proper connection to ESP® control module connector at terminal "E53-35". If OK then turn ignition switch to ON position and measure voltage between terminal "E53-35" and vehicle body ground. Is it 10 - 14 V?	Go to Step 4.	"GRN/ORN" wire circuit open.
4	Turn ignition switch to OFF position. Check for proper connection to ESP® control module connector at terminals "E53-1" and "E53-32". If OK then turn ignition switch to ON position and measure voltage between each terminal of "E53-1", "E53-32" and vehicle body ground. Are they 10 - 14 V?	Go to Step 5.	"WHT/RED" and/or "WHT/BLU" wire circuit open.
5	Turn ignition switch to OFF position. Check for proper connection to ESP® control module connector at terminals "E53-16" and "E53-47". If OK, measure resistance between each terminal of "E53-16", "E53-47" and vehicle body ground. Are resistance less than 2 Ω?	Go to Step 6.	Ground circuit for ESP® control module open or high resistance.
6	Check if communication is possible by trying communication with other controller (ECM, TCM, BCM, 4WD control module or SDM). Is it possible to communicate with other controller?	Go to Step 7.	Repair open in common section of serial data circuit ("PPL/WHT" wire circuit) used by all controllers or short to ground or power circuit which has occurred somewhere in serial data circuit ("PPL/WHT" wire circuit).
7	Turn ignition switch to ON position. Measure voltage between terminal B of data link connector and vehicle body ground. Is voltage 10 - 12 V?	Go to step 8.	Terminal B circuit open or shorted to ground.
8	Turn ignition switch to OFF position. Measure resistance between the following terminals; Terminal G of data link connector and vehicle body ground. Terminal G1 of data link connector and vehicle body ground. Is each resistance 1 Ω or less?	Go to step 9.	Terminal G and/or G1 circuit open or high resistance.
9	Turn ignition switch to OFF position. Check proper connection at "E53-33" ("PPL/WHT" wire) terminal for serial data circuit. If OK, then check resistance between "E53-33" ("PPL/WHT" wire) terminal and "PPL/WHT" wire terminal (2) for serial data circuit in DLC (1). Is resistance 1 Ω or less? Courtesy of SUZUKI OF AMERICA CORP.	Substitute a known-good ESP® hydraulic unit/control module and recheck.	Repair high resistance or open in "PPL/WHT" wire circuit for anti lock brake system.